Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 1 | /* |
| 2 | * ADIS16201 Programmable Digital Vibration Sensor driver |
| 3 | * |
| 4 | * Copyright 2010 Analog Devices Inc. |
| 5 | * |
| 6 | * Licensed under the GPL-2 or later. |
| 7 | */ |
| 8 | |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 9 | #include <linux/delay.h> |
| 10 | #include <linux/mutex.h> |
| 11 | #include <linux/device.h> |
| 12 | #include <linux/kernel.h> |
| 13 | #include <linux/spi/spi.h> |
| 14 | #include <linux/slab.h> |
| 15 | #include <linux/sysfs.h> |
Paul Gortmaker | 99c9785 | 2011-07-03 15:49:50 -0400 | [diff] [blame] | 16 | #include <linux/module.h> |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 17 | |
| 18 | #include "../iio.h" |
| 19 | #include "../sysfs.h" |
Jonathan Cameron | af5046a | 2011-10-26 17:41:32 +0100 | [diff] [blame^] | 20 | #include "../buffer.h" |
Jonathan Cameron | cf96ffd | 2011-05-18 14:41:46 +0100 | [diff] [blame] | 21 | |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 22 | #include "adis16201.h" |
| 23 | |
Jonathan Cameron | cf96ffd | 2011-05-18 14:41:46 +0100 | [diff] [blame] | 24 | enum adis16201_chan { |
| 25 | in_supply, |
| 26 | temp, |
| 27 | accel_x, |
| 28 | accel_y, |
| 29 | incli_x, |
| 30 | incli_y, |
| 31 | in_aux, |
| 32 | }; |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 33 | |
| 34 | /** |
| 35 | * adis16201_spi_write_reg_8() - write single byte to a register |
| 36 | * @dev: device associated with child of actual device (iio_dev or iio_trig) |
| 37 | * @reg_address: the address of the register to be written |
| 38 | * @val: the value to write |
| 39 | **/ |
Jonathan Cameron | d31907f | 2011-06-27 13:07:58 +0100 | [diff] [blame] | 40 | static int adis16201_spi_write_reg_8(struct iio_dev *indio_dev, |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 41 | u8 reg_address, |
| 42 | u8 val) |
| 43 | { |
| 44 | int ret; |
Jonathan Cameron | d31907f | 2011-06-27 13:07:58 +0100 | [diff] [blame] | 45 | struct adis16201_state *st = iio_priv(indio_dev); |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 46 | |
| 47 | mutex_lock(&st->buf_lock); |
| 48 | st->tx[0] = ADIS16201_WRITE_REG(reg_address); |
| 49 | st->tx[1] = val; |
| 50 | |
| 51 | ret = spi_write(st->us, st->tx, 2); |
| 52 | mutex_unlock(&st->buf_lock); |
| 53 | |
| 54 | return ret; |
| 55 | } |
| 56 | |
| 57 | /** |
| 58 | * adis16201_spi_write_reg_16() - write 2 bytes to a pair of registers |
Jonathan Cameron | cf96ffd | 2011-05-18 14:41:46 +0100 | [diff] [blame] | 59 | * @indio_dev: iio device associated with child of actual device |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 60 | * @reg_address: the address of the lower of the two registers. Second register |
| 61 | * is assumed to have address one greater. |
| 62 | * @val: value to be written |
| 63 | **/ |
Jonathan Cameron | cf96ffd | 2011-05-18 14:41:46 +0100 | [diff] [blame] | 64 | static int adis16201_spi_write_reg_16(struct iio_dev *indio_dev, |
| 65 | u8 lower_reg_address, |
| 66 | u16 value) |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 67 | { |
| 68 | int ret; |
| 69 | struct spi_message msg; |
Jonathan Cameron | d31907f | 2011-06-27 13:07:58 +0100 | [diff] [blame] | 70 | struct adis16201_state *st = iio_priv(indio_dev); |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 71 | struct spi_transfer xfers[] = { |
| 72 | { |
| 73 | .tx_buf = st->tx, |
| 74 | .bits_per_word = 8, |
| 75 | .len = 2, |
| 76 | .cs_change = 1, |
| 77 | }, { |
| 78 | .tx_buf = st->tx + 2, |
| 79 | .bits_per_word = 8, |
| 80 | .len = 2, |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 81 | }, |
| 82 | }; |
| 83 | |
| 84 | mutex_lock(&st->buf_lock); |
| 85 | st->tx[0] = ADIS16201_WRITE_REG(lower_reg_address); |
| 86 | st->tx[1] = value & 0xFF; |
| 87 | st->tx[2] = ADIS16201_WRITE_REG(lower_reg_address + 1); |
| 88 | st->tx[3] = (value >> 8) & 0xFF; |
| 89 | |
| 90 | spi_message_init(&msg); |
| 91 | spi_message_add_tail(&xfers[0], &msg); |
| 92 | spi_message_add_tail(&xfers[1], &msg); |
| 93 | ret = spi_sync(st->us, &msg); |
| 94 | mutex_unlock(&st->buf_lock); |
| 95 | |
| 96 | return ret; |
| 97 | } |
| 98 | |
| 99 | /** |
| 100 | * adis16201_spi_read_reg_16() - read 2 bytes from a 16-bit register |
Jonathan Cameron | cf96ffd | 2011-05-18 14:41:46 +0100 | [diff] [blame] | 101 | * @indio_dev: iio device associated with child of actual device |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 102 | * @reg_address: the address of the lower of the two registers. Second register |
| 103 | * is assumed to have address one greater. |
| 104 | * @val: somewhere to pass back the value read |
| 105 | **/ |
Jonathan Cameron | cf96ffd | 2011-05-18 14:41:46 +0100 | [diff] [blame] | 106 | static int adis16201_spi_read_reg_16(struct iio_dev *indio_dev, |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 107 | u8 lower_reg_address, |
| 108 | u16 *val) |
| 109 | { |
| 110 | struct spi_message msg; |
Jonathan Cameron | d31907f | 2011-06-27 13:07:58 +0100 | [diff] [blame] | 111 | struct adis16201_state *st = iio_priv(indio_dev); |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 112 | int ret; |
| 113 | struct spi_transfer xfers[] = { |
| 114 | { |
| 115 | .tx_buf = st->tx, |
| 116 | .bits_per_word = 8, |
| 117 | .len = 2, |
| 118 | .cs_change = 1, |
| 119 | .delay_usecs = 20, |
| 120 | }, { |
| 121 | .rx_buf = st->rx, |
| 122 | .bits_per_word = 8, |
| 123 | .len = 2, |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 124 | .delay_usecs = 20, |
| 125 | }, |
| 126 | }; |
| 127 | |
| 128 | mutex_lock(&st->buf_lock); |
| 129 | st->tx[0] = ADIS16201_READ_REG(lower_reg_address); |
| 130 | st->tx[1] = 0; |
| 131 | |
| 132 | spi_message_init(&msg); |
| 133 | spi_message_add_tail(&xfers[0], &msg); |
| 134 | spi_message_add_tail(&xfers[1], &msg); |
| 135 | ret = spi_sync(st->us, &msg); |
| 136 | if (ret) { |
| 137 | dev_err(&st->us->dev, "problem when reading 16 bit register 0x%02X", |
| 138 | lower_reg_address); |
| 139 | goto error_ret; |
| 140 | } |
| 141 | *val = (st->rx[0] << 8) | st->rx[1]; |
| 142 | |
| 143 | error_ret: |
| 144 | mutex_unlock(&st->buf_lock); |
| 145 | return ret; |
| 146 | } |
| 147 | |
Jonathan Cameron | d31907f | 2011-06-27 13:07:58 +0100 | [diff] [blame] | 148 | static int adis16201_reset(struct iio_dev *indio_dev) |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 149 | { |
| 150 | int ret; |
Jonathan Cameron | d31907f | 2011-06-27 13:07:58 +0100 | [diff] [blame] | 151 | struct adis16201_state *st = iio_priv(indio_dev); |
| 152 | |
| 153 | ret = adis16201_spi_write_reg_8(indio_dev, |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 154 | ADIS16201_GLOB_CMD, |
| 155 | ADIS16201_GLOB_CMD_SW_RESET); |
| 156 | if (ret) |
Jonathan Cameron | d31907f | 2011-06-27 13:07:58 +0100 | [diff] [blame] | 157 | dev_err(&st->us->dev, "problem resetting device"); |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 158 | |
| 159 | return ret; |
| 160 | } |
| 161 | |
| 162 | static ssize_t adis16201_write_reset(struct device *dev, |
| 163 | struct device_attribute *attr, |
| 164 | const char *buf, size_t len) |
| 165 | { |
Jonathan Cameron | d31907f | 2011-06-27 13:07:58 +0100 | [diff] [blame] | 166 | int ret; |
| 167 | bool res; |
| 168 | |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 169 | if (len < 1) |
| 170 | return -EINVAL; |
Jonathan Cameron | d31907f | 2011-06-27 13:07:58 +0100 | [diff] [blame] | 171 | ret = strtobool(buf, &res); |
| 172 | if (ret || !res) |
| 173 | return ret; |
| 174 | return adis16201_reset(dev_get_drvdata(dev)); |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 175 | } |
| 176 | |
Jonathan Cameron | cf96ffd | 2011-05-18 14:41:46 +0100 | [diff] [blame] | 177 | int adis16201_set_irq(struct iio_dev *indio_dev, bool enable) |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 178 | { |
| 179 | int ret = 0; |
| 180 | u16 msc; |
| 181 | |
Jonathan Cameron | cf96ffd | 2011-05-18 14:41:46 +0100 | [diff] [blame] | 182 | ret = adis16201_spi_read_reg_16(indio_dev, ADIS16201_MSC_CTRL, &msc); |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 183 | if (ret) |
| 184 | goto error_ret; |
| 185 | |
| 186 | msc |= ADIS16201_MSC_CTRL_ACTIVE_HIGH; |
| 187 | msc &= ~ADIS16201_MSC_CTRL_DATA_RDY_DIO1; |
| 188 | if (enable) |
| 189 | msc |= ADIS16201_MSC_CTRL_DATA_RDY_EN; |
| 190 | else |
| 191 | msc &= ~ADIS16201_MSC_CTRL_DATA_RDY_EN; |
| 192 | |
Jonathan Cameron | cf96ffd | 2011-05-18 14:41:46 +0100 | [diff] [blame] | 193 | ret = adis16201_spi_write_reg_16(indio_dev, ADIS16201_MSC_CTRL, msc); |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 194 | |
| 195 | error_ret: |
| 196 | return ret; |
| 197 | } |
| 198 | |
Jonathan Cameron | cf96ffd | 2011-05-18 14:41:46 +0100 | [diff] [blame] | 199 | static int adis16201_check_status(struct iio_dev *indio_dev) |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 200 | { |
| 201 | u16 status; |
| 202 | int ret; |
| 203 | |
Jonathan Cameron | cf96ffd | 2011-05-18 14:41:46 +0100 | [diff] [blame] | 204 | ret = adis16201_spi_read_reg_16(indio_dev, |
| 205 | ADIS16201_DIAG_STAT, &status); |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 206 | if (ret < 0) { |
Jonathan Cameron | cf96ffd | 2011-05-18 14:41:46 +0100 | [diff] [blame] | 207 | dev_err(&indio_dev->dev, "Reading status failed\n"); |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 208 | goto error_ret; |
| 209 | } |
| 210 | ret = status & 0xF; |
| 211 | if (ret) |
| 212 | ret = -EFAULT; |
| 213 | |
| 214 | if (status & ADIS16201_DIAG_STAT_SPI_FAIL) |
Jonathan Cameron | cf96ffd | 2011-05-18 14:41:46 +0100 | [diff] [blame] | 215 | dev_err(&indio_dev->dev, "SPI failure\n"); |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 216 | if (status & ADIS16201_DIAG_STAT_FLASH_UPT) |
Jonathan Cameron | cf96ffd | 2011-05-18 14:41:46 +0100 | [diff] [blame] | 217 | dev_err(&indio_dev->dev, "Flash update failed\n"); |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 218 | if (status & ADIS16201_DIAG_STAT_POWER_HIGH) |
Jonathan Cameron | cf96ffd | 2011-05-18 14:41:46 +0100 | [diff] [blame] | 219 | dev_err(&indio_dev->dev, "Power supply above 3.625V\n"); |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 220 | if (status & ADIS16201_DIAG_STAT_POWER_LOW) |
Jonathan Cameron | cf96ffd | 2011-05-18 14:41:46 +0100 | [diff] [blame] | 221 | dev_err(&indio_dev->dev, "Power supply below 3.15V\n"); |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 222 | |
| 223 | error_ret: |
| 224 | return ret; |
| 225 | } |
| 226 | |
Jonathan Cameron | cf96ffd | 2011-05-18 14:41:46 +0100 | [diff] [blame] | 227 | static int adis16201_self_test(struct iio_dev *indio_dev) |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 228 | { |
| 229 | int ret; |
Jonathan Cameron | cf96ffd | 2011-05-18 14:41:46 +0100 | [diff] [blame] | 230 | ret = adis16201_spi_write_reg_16(indio_dev, |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 231 | ADIS16201_MSC_CTRL, |
| 232 | ADIS16201_MSC_CTRL_SELF_TEST_EN); |
| 233 | if (ret) { |
Jonathan Cameron | cf96ffd | 2011-05-18 14:41:46 +0100 | [diff] [blame] | 234 | dev_err(&indio_dev->dev, "problem starting self test"); |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 235 | goto err_ret; |
| 236 | } |
| 237 | |
Jonathan Cameron | cf96ffd | 2011-05-18 14:41:46 +0100 | [diff] [blame] | 238 | ret = adis16201_check_status(indio_dev); |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 239 | |
| 240 | err_ret: |
| 241 | return ret; |
| 242 | } |
| 243 | |
Jonathan Cameron | d31907f | 2011-06-27 13:07:58 +0100 | [diff] [blame] | 244 | static int adis16201_initial_setup(struct iio_dev *indio_dev) |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 245 | { |
| 246 | int ret; |
Jonathan Cameron | d31907f | 2011-06-27 13:07:58 +0100 | [diff] [blame] | 247 | struct device *dev = &indio_dev->dev; |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 248 | |
| 249 | /* Disable IRQ */ |
Jonathan Cameron | d31907f | 2011-06-27 13:07:58 +0100 | [diff] [blame] | 250 | ret = adis16201_set_irq(indio_dev, false); |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 251 | if (ret) { |
| 252 | dev_err(dev, "disable irq failed"); |
| 253 | goto err_ret; |
| 254 | } |
| 255 | |
| 256 | /* Do self test */ |
Jonathan Cameron | d31907f | 2011-06-27 13:07:58 +0100 | [diff] [blame] | 257 | ret = adis16201_self_test(indio_dev); |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 258 | if (ret) { |
| 259 | dev_err(dev, "self test failure"); |
| 260 | goto err_ret; |
| 261 | } |
| 262 | |
| 263 | /* Read status register to check the result */ |
Jonathan Cameron | d31907f | 2011-06-27 13:07:58 +0100 | [diff] [blame] | 264 | ret = adis16201_check_status(indio_dev); |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 265 | if (ret) { |
Jonathan Cameron | d31907f | 2011-06-27 13:07:58 +0100 | [diff] [blame] | 266 | adis16201_reset(indio_dev); |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 267 | dev_err(dev, "device not playing ball -> reset"); |
| 268 | msleep(ADIS16201_STARTUP_DELAY); |
Jonathan Cameron | d31907f | 2011-06-27 13:07:58 +0100 | [diff] [blame] | 269 | ret = adis16201_check_status(indio_dev); |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 270 | if (ret) { |
| 271 | dev_err(dev, "giving up"); |
| 272 | goto err_ret; |
| 273 | } |
| 274 | } |
| 275 | |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 276 | err_ret: |
| 277 | return ret; |
| 278 | } |
| 279 | |
Jonathan Cameron | cf96ffd | 2011-05-18 14:41:46 +0100 | [diff] [blame] | 280 | static u8 adis16201_addresses[7][2] = { |
| 281 | [in_supply] = { ADIS16201_SUPPLY_OUT, }, |
| 282 | [temp] = { ADIS16201_TEMP_OUT }, |
| 283 | [accel_x] = { ADIS16201_XACCL_OUT, ADIS16201_XACCL_OFFS }, |
| 284 | [accel_y] = { ADIS16201_YACCL_OUT, ADIS16201_YACCL_OFFS }, |
| 285 | [in_aux] = { ADIS16201_AUX_ADC }, |
| 286 | [incli_x] = { ADIS16201_XINCL_OUT }, |
| 287 | [incli_y] = { ADIS16201_YINCL_OUT }, |
| 288 | }; |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 289 | |
Jonathan Cameron | cf96ffd | 2011-05-18 14:41:46 +0100 | [diff] [blame] | 290 | static int adis16201_read_raw(struct iio_dev *indio_dev, |
| 291 | struct iio_chan_spec const *chan, |
| 292 | int *val, int *val2, |
| 293 | long mask) |
| 294 | { |
| 295 | int ret; |
| 296 | int bits; |
| 297 | u8 addr; |
| 298 | s16 val16; |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 299 | |
Jonathan Cameron | cf96ffd | 2011-05-18 14:41:46 +0100 | [diff] [blame] | 300 | switch (mask) { |
| 301 | case 0: |
| 302 | mutex_lock(&indio_dev->mlock); |
| 303 | addr = adis16201_addresses[chan->address][0]; |
| 304 | ret = adis16201_spi_read_reg_16(indio_dev, addr, &val16); |
Dan Carpenter | 85ee35e | 2011-06-30 12:01:31 +0300 | [diff] [blame] | 305 | if (ret) { |
| 306 | mutex_unlock(&indio_dev->mlock); |
Jonathan Cameron | cf96ffd | 2011-05-18 14:41:46 +0100 | [diff] [blame] | 307 | return ret; |
Dan Carpenter | 85ee35e | 2011-06-30 12:01:31 +0300 | [diff] [blame] | 308 | } |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 309 | |
Jonathan Cameron | cf96ffd | 2011-05-18 14:41:46 +0100 | [diff] [blame] | 310 | if (val16 & ADIS16201_ERROR_ACTIVE) { |
| 311 | ret = adis16201_check_status(indio_dev); |
Dan Carpenter | 85ee35e | 2011-06-30 12:01:31 +0300 | [diff] [blame] | 312 | if (ret) { |
| 313 | mutex_unlock(&indio_dev->mlock); |
Jonathan Cameron | cf96ffd | 2011-05-18 14:41:46 +0100 | [diff] [blame] | 314 | return ret; |
Dan Carpenter | 85ee35e | 2011-06-30 12:01:31 +0300 | [diff] [blame] | 315 | } |
Jonathan Cameron | cf96ffd | 2011-05-18 14:41:46 +0100 | [diff] [blame] | 316 | } |
| 317 | val16 = val16 & ((1 << chan->scan_type.realbits) - 1); |
| 318 | if (chan->scan_type.sign == 's') |
| 319 | val16 = (s16)(val16 << |
| 320 | (16 - chan->scan_type.realbits)) >> |
| 321 | (16 - chan->scan_type.realbits); |
| 322 | *val = val16; |
| 323 | mutex_unlock(&indio_dev->mlock); |
| 324 | return IIO_VAL_INT; |
| 325 | case (1 << IIO_CHAN_INFO_SCALE_SEPARATE): |
| 326 | case (1 << IIO_CHAN_INFO_SCALE_SHARED): |
| 327 | switch (chan->type) { |
Jonathan Cameron | 6835cb6 | 2011-09-27 09:56:41 +0100 | [diff] [blame] | 328 | case IIO_VOLTAGE: |
Jonathan Cameron | cf96ffd | 2011-05-18 14:41:46 +0100 | [diff] [blame] | 329 | *val = 0; |
| 330 | if (chan->channel == 0) |
| 331 | *val2 = 1220; |
| 332 | else |
| 333 | *val2 = 610; |
| 334 | return IIO_VAL_INT_PLUS_MICRO; |
| 335 | case IIO_TEMP: |
| 336 | *val = 0; |
| 337 | *val2 = -470000; |
| 338 | return IIO_VAL_INT_PLUS_MICRO; |
| 339 | case IIO_ACCEL: |
| 340 | *val = 0; |
| 341 | *val2 = 462500; |
| 342 | return IIO_VAL_INT_PLUS_MICRO; |
| 343 | case IIO_INCLI: |
| 344 | *val = 0; |
| 345 | *val2 = 100000; |
| 346 | return IIO_VAL_INT_PLUS_MICRO; |
| 347 | default: |
| 348 | return -EINVAL; |
| 349 | } |
| 350 | break; |
| 351 | case (1 << IIO_CHAN_INFO_OFFSET_SEPARATE): |
| 352 | *val = 25; |
| 353 | return IIO_VAL_INT; |
| 354 | case (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE): |
| 355 | switch (chan->type) { |
| 356 | case IIO_ACCEL: |
| 357 | bits = 12; |
| 358 | break; |
| 359 | case IIO_INCLI: |
| 360 | bits = 9; |
| 361 | break; |
| 362 | default: |
| 363 | return -EINVAL; |
| 364 | }; |
| 365 | mutex_lock(&indio_dev->mlock); |
| 366 | addr = adis16201_addresses[chan->address][1]; |
| 367 | ret = adis16201_spi_read_reg_16(indio_dev, addr, &val16); |
| 368 | if (ret) { |
| 369 | mutex_unlock(&indio_dev->mlock); |
| 370 | return ret; |
| 371 | } |
| 372 | val16 &= (1 << bits) - 1; |
| 373 | val16 = (s16)(val16 << (16 - bits)) >> (16 - bits); |
| 374 | *val = val16; |
| 375 | mutex_unlock(&indio_dev->mlock); |
| 376 | return IIO_VAL_INT; |
| 377 | } |
| 378 | return -EINVAL; |
| 379 | } |
| 380 | |
| 381 | static int adis16201_write_raw(struct iio_dev *indio_dev, |
| 382 | struct iio_chan_spec const *chan, |
| 383 | int val, |
| 384 | int val2, |
| 385 | long mask) |
| 386 | { |
| 387 | int bits; |
| 388 | s16 val16; |
| 389 | u8 addr; |
| 390 | switch (mask) { |
| 391 | case (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE): |
| 392 | switch (chan->type) { |
| 393 | case IIO_ACCEL: |
| 394 | bits = 12; |
| 395 | break; |
| 396 | case IIO_INCLI: |
| 397 | bits = 9; |
| 398 | break; |
| 399 | default: |
| 400 | return -EINVAL; |
| 401 | }; |
| 402 | val16 = val & ((1 << bits) - 1); |
| 403 | addr = adis16201_addresses[chan->address][1]; |
| 404 | return adis16201_spi_write_reg_16(indio_dev, addr, val16); |
| 405 | } |
| 406 | return -EINVAL; |
| 407 | } |
| 408 | |
| 409 | static struct iio_chan_spec adis16201_channels[] = { |
Jonathan Cameron | 6835cb6 | 2011-09-27 09:56:41 +0100 | [diff] [blame] | 410 | IIO_CHAN(IIO_VOLTAGE, 0, 1, 0, "supply", 0, 0, |
Jonathan Cameron | cf96ffd | 2011-05-18 14:41:46 +0100 | [diff] [blame] | 411 | (1 << IIO_CHAN_INFO_SCALE_SEPARATE), |
| 412 | in_supply, ADIS16201_SCAN_SUPPLY, |
| 413 | IIO_ST('u', 12, 16, 0), 0), |
| 414 | IIO_CHAN(IIO_TEMP, 0, 1, 0, NULL, 0, 0, |
| 415 | (1 << IIO_CHAN_INFO_SCALE_SEPARATE) | |
| 416 | (1 << IIO_CHAN_INFO_OFFSET_SEPARATE), |
| 417 | temp, ADIS16201_SCAN_TEMP, |
| 418 | IIO_ST('u', 12, 16, 0), 0), |
| 419 | IIO_CHAN(IIO_ACCEL, 1, 0, 0, NULL, 0, IIO_MOD_X, |
| 420 | (1 << IIO_CHAN_INFO_SCALE_SHARED) | |
| 421 | (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE), |
| 422 | accel_x, ADIS16201_SCAN_ACC_X, |
| 423 | IIO_ST('s', 14, 16, 0), 0), |
| 424 | IIO_CHAN(IIO_ACCEL, 1, 0, 0, NULL, 0, IIO_MOD_Y, |
| 425 | (1 << IIO_CHAN_INFO_SCALE_SHARED) | |
| 426 | (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE), |
| 427 | accel_y, ADIS16201_SCAN_ACC_Y, |
| 428 | IIO_ST('s', 14, 16, 0), 0), |
Jonathan Cameron | 6835cb6 | 2011-09-27 09:56:41 +0100 | [diff] [blame] | 429 | IIO_CHAN(IIO_VOLTAGE, 0, 1, 0, NULL, 1, 0, |
Jonathan Cameron | cf96ffd | 2011-05-18 14:41:46 +0100 | [diff] [blame] | 430 | (1 << IIO_CHAN_INFO_SCALE_SEPARATE), |
| 431 | in_aux, ADIS16201_SCAN_AUX_ADC, |
| 432 | IIO_ST('u', 12, 16, 0), 0), |
| 433 | IIO_CHAN(IIO_INCLI, 1, 0, 0, NULL, 0, IIO_MOD_X, |
| 434 | (1 << IIO_CHAN_INFO_SCALE_SHARED) | |
| 435 | (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE), |
| 436 | incli_x, ADIS16201_SCAN_INCLI_X, |
| 437 | IIO_ST('s', 14, 16, 0), 0), |
| 438 | IIO_CHAN(IIO_INCLI, 1, 0, 0, NULL, 0, IIO_MOD_Y, |
| 439 | (1 << IIO_CHAN_INFO_SCALE_SHARED) | |
| 440 | (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE), |
| 441 | incli_y, ADIS16201_SCAN_INCLI_Y, |
| 442 | IIO_ST('s', 14, 16, 0), 0), |
| 443 | IIO_CHAN_SOFT_TIMESTAMP(7) |
| 444 | }; |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 445 | |
| 446 | static IIO_DEVICE_ATTR(reset, S_IWUSR, NULL, adis16201_write_reset, 0); |
| 447 | |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 448 | static struct attribute *adis16201_attributes[] = { |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 449 | &iio_dev_attr_reset.dev_attr.attr, |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 450 | NULL |
| 451 | }; |
| 452 | |
| 453 | static const struct attribute_group adis16201_attribute_group = { |
| 454 | .attrs = adis16201_attributes, |
| 455 | }; |
| 456 | |
Jonathan Cameron | 6fe8135 | 2011-05-18 14:42:37 +0100 | [diff] [blame] | 457 | static const struct iio_info adis16201_info = { |
| 458 | .attrs = &adis16201_attribute_group, |
| 459 | .read_raw = &adis16201_read_raw, |
| 460 | .write_raw = &adis16201_write_raw, |
| 461 | .driver_module = THIS_MODULE, |
| 462 | }; |
| 463 | |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 464 | static int __devinit adis16201_probe(struct spi_device *spi) |
| 465 | { |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 466 | int ret; |
Jonathan Cameron | d31907f | 2011-06-27 13:07:58 +0100 | [diff] [blame] | 467 | struct adis16201_state *st; |
| 468 | struct iio_dev *indio_dev; |
| 469 | |
| 470 | /* setup the industrialio driver allocated elements */ |
| 471 | indio_dev = iio_allocate_device(sizeof(*st)); |
| 472 | if (indio_dev == NULL) { |
| 473 | ret = -ENOMEM; |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 474 | goto error_ret; |
| 475 | } |
Jonathan Cameron | d31907f | 2011-06-27 13:07:58 +0100 | [diff] [blame] | 476 | st = iio_priv(indio_dev); |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 477 | /* this is only used for removal purposes */ |
Jonathan Cameron | d31907f | 2011-06-27 13:07:58 +0100 | [diff] [blame] | 478 | spi_set_drvdata(spi, indio_dev); |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 479 | |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 480 | st->us = spi; |
| 481 | mutex_init(&st->buf_lock); |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 482 | |
Jonathan Cameron | d31907f | 2011-06-27 13:07:58 +0100 | [diff] [blame] | 483 | indio_dev->name = spi->dev.driver->name; |
| 484 | indio_dev->dev.parent = &spi->dev; |
| 485 | indio_dev->info = &adis16201_info; |
Jonathan Cameron | 6fe8135 | 2011-05-18 14:42:37 +0100 | [diff] [blame] | 486 | |
Jonathan Cameron | d31907f | 2011-06-27 13:07:58 +0100 | [diff] [blame] | 487 | indio_dev->channels = adis16201_channels; |
| 488 | indio_dev->num_channels = ARRAY_SIZE(adis16201_channels); |
| 489 | indio_dev->modes = INDIO_DIRECT_MODE; |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 490 | |
Jonathan Cameron | d31907f | 2011-06-27 13:07:58 +0100 | [diff] [blame] | 491 | ret = adis16201_configure_ring(indio_dev); |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 492 | if (ret) |
| 493 | goto error_free_dev; |
| 494 | |
Jonathan Cameron | 14555b1 | 2011-09-21 11:15:57 +0100 | [diff] [blame] | 495 | ret = iio_buffer_register(indio_dev, |
| 496 | adis16201_channels, |
| 497 | ARRAY_SIZE(adis16201_channels)); |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 498 | if (ret) { |
| 499 | printk(KERN_ERR "failed to initialize the ring\n"); |
| 500 | goto error_unreg_ring_funcs; |
| 501 | } |
| 502 | |
| 503 | if (spi->irq) { |
Jonathan Cameron | d31907f | 2011-06-27 13:07:58 +0100 | [diff] [blame] | 504 | ret = adis16201_probe_trigger(indio_dev); |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 505 | if (ret) |
Jonathan Cameron | 8078244 | 2011-04-18 12:59:03 +0100 | [diff] [blame] | 506 | goto error_uninitialize_ring; |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 507 | } |
| 508 | |
| 509 | /* Get the device into a sane initial state */ |
Jonathan Cameron | d31907f | 2011-06-27 13:07:58 +0100 | [diff] [blame] | 510 | ret = adis16201_initial_setup(indio_dev); |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 511 | if (ret) |
| 512 | goto error_remove_trigger; |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 513 | |
| 514 | ret = iio_device_register(indio_dev); |
| 515 | if (ret < 0) |
| 516 | goto error_remove_trigger; |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 517 | return 0; |
| 518 | |
| 519 | error_remove_trigger: |
Jonathan Cameron | d31907f | 2011-06-27 13:07:58 +0100 | [diff] [blame] | 520 | adis16201_remove_trigger(indio_dev); |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 521 | error_uninitialize_ring: |
Jonathan Cameron | 14555b1 | 2011-09-21 11:15:57 +0100 | [diff] [blame] | 522 | iio_buffer_unregister(indio_dev); |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 523 | error_unreg_ring_funcs: |
Jonathan Cameron | d31907f | 2011-06-27 13:07:58 +0100 | [diff] [blame] | 524 | adis16201_unconfigure_ring(indio_dev); |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 525 | error_free_dev: |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 526 | iio_free_device(indio_dev); |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 527 | error_ret: |
| 528 | return ret; |
| 529 | } |
| 530 | |
| 531 | static int adis16201_remove(struct spi_device *spi) |
| 532 | { |
Jonathan Cameron | d31907f | 2011-06-27 13:07:58 +0100 | [diff] [blame] | 533 | struct iio_dev *indio_dev = spi_get_drvdata(spi); |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 534 | |
Jonathan Cameron | d2fffd6 | 2011-10-14 14:46:58 +0100 | [diff] [blame] | 535 | iio_device_unregister(indio_dev); |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 536 | adis16201_remove_trigger(indio_dev); |
Jonathan Cameron | 14555b1 | 2011-09-21 11:15:57 +0100 | [diff] [blame] | 537 | iio_buffer_unregister(indio_dev); |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 538 | adis16201_unconfigure_ring(indio_dev); |
Jonathan Cameron | d2fffd6 | 2011-10-14 14:46:58 +0100 | [diff] [blame] | 539 | iio_free_device(indio_dev); |
Barry Song | f7fe1d1 | 2010-10-27 21:43:49 -0400 | [diff] [blame] | 540 | |
| 541 | return 0; |
| 542 | } |
| 543 | |
| 544 | static struct spi_driver adis16201_driver = { |
| 545 | .driver = { |
| 546 | .name = "adis16201", |
| 547 | .owner = THIS_MODULE, |
| 548 | }, |
| 549 | .probe = adis16201_probe, |
| 550 | .remove = __devexit_p(adis16201_remove), |
| 551 | }; |
| 552 | |
| 553 | static __init int adis16201_init(void) |
| 554 | { |
| 555 | return spi_register_driver(&adis16201_driver); |
| 556 | } |
| 557 | module_init(adis16201_init); |
| 558 | |
| 559 | static __exit void adis16201_exit(void) |
| 560 | { |
| 561 | spi_unregister_driver(&adis16201_driver); |
| 562 | } |
| 563 | module_exit(adis16201_exit); |
| 564 | |
| 565 | MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>"); |
| 566 | MODULE_DESCRIPTION("Analog Devices ADIS16201 Programmable Digital Vibration Sensor driver"); |
| 567 | MODULE_LICENSE("GPL v2"); |