Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 1 | /* |
| 2 | * ADIS16209 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 | 671ece1 | 2010-05-07 15:38:59 +0100 | [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> |
Mike Frysinger | 1cb6c1f | 2010-05-23 03:10:35 -0400 | [diff] [blame] | 14 | #include <linux/slab.h> |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 15 | #include <linux/sysfs.h> |
| 16 | #include <linux/list.h> |
Paul Gortmaker | 99c9785 | 2011-07-03 15:49:50 -0400 | [diff] [blame] | 17 | #include <linux/module.h> |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 18 | |
| 19 | #include "../iio.h" |
| 20 | #include "../sysfs.h" |
Jonathan Cameron | 2662051 | 2010-07-11 16:39:14 +0100 | [diff] [blame] | 21 | #include "../ring_generic.h" |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 22 | |
| 23 | #include "adis16209.h" |
| 24 | |
| 25 | #define DRIVER_NAME "adis16209" |
| 26 | |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 27 | /** |
| 28 | * adis16209_spi_write_reg_8() - write single byte to a register |
Jonathan Cameron | a34c26dc | 2011-05-18 14:41:49 +0100 | [diff] [blame] | 29 | * @indio_dev: iio device associated with actual device |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 30 | * @reg_address: the address of the register to be written |
| 31 | * @val: the value to write |
| 32 | **/ |
Jonathan Cameron | a34c26dc | 2011-05-18 14:41:49 +0100 | [diff] [blame] | 33 | static int adis16209_spi_write_reg_8(struct iio_dev *indio_dev, |
| 34 | u8 reg_address, |
| 35 | u8 val) |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 36 | { |
| 37 | int ret; |
Jonathan Cameron | 35212df | 2011-06-27 13:07:13 +0100 | [diff] [blame] | 38 | struct adis16209_state *st = iio_priv(indio_dev); |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 39 | |
| 40 | mutex_lock(&st->buf_lock); |
| 41 | st->tx[0] = ADIS16209_WRITE_REG(reg_address); |
| 42 | st->tx[1] = val; |
| 43 | |
| 44 | ret = spi_write(st->us, st->tx, 2); |
| 45 | mutex_unlock(&st->buf_lock); |
| 46 | |
| 47 | return ret; |
| 48 | } |
| 49 | |
| 50 | /** |
| 51 | * adis16209_spi_write_reg_16() - write 2 bytes to a pair of registers |
Jonathan Cameron | a34c26dc | 2011-05-18 14:41:49 +0100 | [diff] [blame] | 52 | * @indio_dev: iio device associated actual device |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 53 | * @reg_address: the address of the lower of the two registers. Second register |
| 54 | * is assumed to have address one greater. |
| 55 | * @val: value to be written |
| 56 | **/ |
Jonathan Cameron | a34c26dc | 2011-05-18 14:41:49 +0100 | [diff] [blame] | 57 | static int adis16209_spi_write_reg_16(struct iio_dev *indio_dev, |
| 58 | u8 lower_reg_address, |
| 59 | u16 value) |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 60 | { |
| 61 | int ret; |
| 62 | struct spi_message msg; |
Jonathan Cameron | 35212df | 2011-06-27 13:07:13 +0100 | [diff] [blame] | 63 | struct adis16209_state *st = iio_priv(indio_dev); |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 64 | struct spi_transfer xfers[] = { |
| 65 | { |
| 66 | .tx_buf = st->tx, |
| 67 | .bits_per_word = 8, |
| 68 | .len = 2, |
| 69 | .cs_change = 1, |
Barry Song | 00ae794 | 2010-06-04 17:19:54 +0800 | [diff] [blame] | 70 | .delay_usecs = 30, |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 71 | }, { |
| 72 | .tx_buf = st->tx + 2, |
| 73 | .bits_per_word = 8, |
| 74 | .len = 2, |
Barry Song | 00ae794 | 2010-06-04 17:19:54 +0800 | [diff] [blame] | 75 | .delay_usecs = 30, |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 76 | }, |
| 77 | }; |
| 78 | |
| 79 | mutex_lock(&st->buf_lock); |
| 80 | st->tx[0] = ADIS16209_WRITE_REG(lower_reg_address); |
| 81 | st->tx[1] = value & 0xFF; |
| 82 | st->tx[2] = ADIS16209_WRITE_REG(lower_reg_address + 1); |
| 83 | st->tx[3] = (value >> 8) & 0xFF; |
| 84 | |
| 85 | spi_message_init(&msg); |
| 86 | spi_message_add_tail(&xfers[0], &msg); |
| 87 | spi_message_add_tail(&xfers[1], &msg); |
| 88 | ret = spi_sync(st->us, &msg); |
| 89 | mutex_unlock(&st->buf_lock); |
| 90 | |
| 91 | return ret; |
| 92 | } |
| 93 | |
| 94 | /** |
| 95 | * adis16209_spi_read_reg_16() - read 2 bytes from a 16-bit register |
Jonathan Cameron | a34c26dc | 2011-05-18 14:41:49 +0100 | [diff] [blame] | 96 | * @indio_dev: iio device associated with device |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 97 | * @reg_address: the address of the lower of the two registers. Second register |
| 98 | * is assumed to have address one greater. |
| 99 | * @val: somewhere to pass back the value read |
| 100 | **/ |
Jonathan Cameron | a34c26dc | 2011-05-18 14:41:49 +0100 | [diff] [blame] | 101 | static int adis16209_spi_read_reg_16(struct iio_dev *indio_dev, |
| 102 | u8 lower_reg_address, |
| 103 | u16 *val) |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 104 | { |
| 105 | struct spi_message msg; |
Jonathan Cameron | 35212df | 2011-06-27 13:07:13 +0100 | [diff] [blame] | 106 | struct adis16209_state *st = iio_priv(indio_dev); |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 107 | int ret; |
| 108 | struct spi_transfer xfers[] = { |
| 109 | { |
| 110 | .tx_buf = st->tx, |
| 111 | .bits_per_word = 8, |
| 112 | .len = 2, |
| 113 | .cs_change = 1, |
Barry Song | 00ae794 | 2010-06-04 17:19:54 +0800 | [diff] [blame] | 114 | .delay_usecs = 30, |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 115 | }, { |
| 116 | .rx_buf = st->rx, |
| 117 | .bits_per_word = 8, |
| 118 | .len = 2, |
Barry Song | 00ae794 | 2010-06-04 17:19:54 +0800 | [diff] [blame] | 119 | .delay_usecs = 30, |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 120 | }, |
| 121 | }; |
| 122 | |
| 123 | mutex_lock(&st->buf_lock); |
| 124 | st->tx[0] = ADIS16209_READ_REG(lower_reg_address); |
| 125 | st->tx[1] = 0; |
| 126 | |
| 127 | spi_message_init(&msg); |
| 128 | spi_message_add_tail(&xfers[0], &msg); |
| 129 | spi_message_add_tail(&xfers[1], &msg); |
| 130 | ret = spi_sync(st->us, &msg); |
| 131 | if (ret) { |
| 132 | dev_err(&st->us->dev, |
| 133 | "problem when reading 16 bit register 0x%02X", |
| 134 | lower_reg_address); |
| 135 | goto error_ret; |
| 136 | } |
| 137 | *val = (st->rx[0] << 8) | st->rx[1]; |
| 138 | |
| 139 | error_ret: |
| 140 | mutex_unlock(&st->buf_lock); |
| 141 | return ret; |
| 142 | } |
| 143 | |
Jonathan Cameron | a34c26dc | 2011-05-18 14:41:49 +0100 | [diff] [blame] | 144 | static int adis16209_reset(struct iio_dev *indio_dev) |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 145 | { |
| 146 | int ret; |
Jonathan Cameron | a34c26dc | 2011-05-18 14:41:49 +0100 | [diff] [blame] | 147 | ret = adis16209_spi_write_reg_8(indio_dev, |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 148 | ADIS16209_GLOB_CMD, |
| 149 | ADIS16209_GLOB_CMD_SW_RESET); |
| 150 | if (ret) |
Jonathan Cameron | a34c26dc | 2011-05-18 14:41:49 +0100 | [diff] [blame] | 151 | dev_err(&indio_dev->dev, "problem resetting device"); |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 152 | |
| 153 | return ret; |
| 154 | } |
| 155 | |
| 156 | static ssize_t adis16209_write_reset(struct device *dev, |
| 157 | struct device_attribute *attr, |
| 158 | const char *buf, size_t len) |
| 159 | { |
Jonathan Cameron | a34c26dc | 2011-05-18 14:41:49 +0100 | [diff] [blame] | 160 | struct iio_dev *indio_dev = dev_get_drvdata(dev); |
| 161 | |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 162 | if (len < 1) |
| 163 | return -EINVAL; |
| 164 | switch (buf[0]) { |
| 165 | case '1': |
| 166 | case 'y': |
| 167 | case 'Y': |
Jonathan Cameron | a34c26dc | 2011-05-18 14:41:49 +0100 | [diff] [blame] | 168 | return adis16209_reset(indio_dev); |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 169 | } |
| 170 | return -EINVAL; |
| 171 | } |
| 172 | |
Jonathan Cameron | a34c26dc | 2011-05-18 14:41:49 +0100 | [diff] [blame] | 173 | int adis16209_set_irq(struct iio_dev *indio_dev, bool enable) |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 174 | { |
| 175 | int ret = 0; |
| 176 | u16 msc; |
| 177 | |
Jonathan Cameron | a34c26dc | 2011-05-18 14:41:49 +0100 | [diff] [blame] | 178 | ret = adis16209_spi_read_reg_16(indio_dev, ADIS16209_MSC_CTRL, &msc); |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 179 | if (ret) |
| 180 | goto error_ret; |
| 181 | |
| 182 | msc |= ADIS16209_MSC_CTRL_ACTIVE_HIGH; |
| 183 | msc &= ~ADIS16209_MSC_CTRL_DATA_RDY_DIO2; |
| 184 | if (enable) |
| 185 | msc |= ADIS16209_MSC_CTRL_DATA_RDY_EN; |
| 186 | else |
| 187 | msc &= ~ADIS16209_MSC_CTRL_DATA_RDY_EN; |
| 188 | |
Jonathan Cameron | a34c26dc | 2011-05-18 14:41:49 +0100 | [diff] [blame] | 189 | ret = adis16209_spi_write_reg_16(indio_dev, ADIS16209_MSC_CTRL, msc); |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 190 | |
| 191 | error_ret: |
| 192 | return ret; |
| 193 | } |
| 194 | |
Jonathan Cameron | a34c26dc | 2011-05-18 14:41:49 +0100 | [diff] [blame] | 195 | static int adis16209_check_status(struct iio_dev *indio_dev) |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 196 | { |
| 197 | u16 status; |
| 198 | int ret; |
| 199 | |
Jonathan Cameron | a34c26dc | 2011-05-18 14:41:49 +0100 | [diff] [blame] | 200 | ret = adis16209_spi_read_reg_16(indio_dev, |
| 201 | ADIS16209_DIAG_STAT, &status); |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 202 | if (ret < 0) { |
Jonathan Cameron | a34c26dc | 2011-05-18 14:41:49 +0100 | [diff] [blame] | 203 | dev_err(&indio_dev->dev, "Reading status failed\n"); |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 204 | goto error_ret; |
| 205 | } |
| 206 | ret = status & 0x1F; |
| 207 | |
| 208 | if (status & ADIS16209_DIAG_STAT_SELFTEST_FAIL) |
Jonathan Cameron | a34c26dc | 2011-05-18 14:41:49 +0100 | [diff] [blame] | 209 | dev_err(&indio_dev->dev, "Self test failure\n"); |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 210 | if (status & ADIS16209_DIAG_STAT_SPI_FAIL) |
Jonathan Cameron | a34c26dc | 2011-05-18 14:41:49 +0100 | [diff] [blame] | 211 | dev_err(&indio_dev->dev, "SPI failure\n"); |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 212 | if (status & ADIS16209_DIAG_STAT_FLASH_UPT) |
Jonathan Cameron | a34c26dc | 2011-05-18 14:41:49 +0100 | [diff] [blame] | 213 | dev_err(&indio_dev->dev, "Flash update failed\n"); |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 214 | if (status & ADIS16209_DIAG_STAT_POWER_HIGH) |
Jonathan Cameron | a34c26dc | 2011-05-18 14:41:49 +0100 | [diff] [blame] | 215 | dev_err(&indio_dev->dev, "Power supply above 3.625V\n"); |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 216 | if (status & ADIS16209_DIAG_STAT_POWER_LOW) |
Jonathan Cameron | a34c26dc | 2011-05-18 14:41:49 +0100 | [diff] [blame] | 217 | dev_err(&indio_dev->dev, "Power supply below 3.15V\n"); |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 218 | |
| 219 | error_ret: |
| 220 | return ret; |
| 221 | } |
| 222 | |
Jonathan Cameron | a34c26dc | 2011-05-18 14:41:49 +0100 | [diff] [blame] | 223 | static int adis16209_self_test(struct iio_dev *indio_dev) |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 224 | { |
| 225 | int ret; |
Jonathan Cameron | a34c26dc | 2011-05-18 14:41:49 +0100 | [diff] [blame] | 226 | ret = adis16209_spi_write_reg_16(indio_dev, |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 227 | ADIS16209_MSC_CTRL, |
| 228 | ADIS16209_MSC_CTRL_SELF_TEST_EN); |
| 229 | if (ret) { |
Jonathan Cameron | a34c26dc | 2011-05-18 14:41:49 +0100 | [diff] [blame] | 230 | dev_err(&indio_dev->dev, "problem starting self test"); |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 231 | goto err_ret; |
| 232 | } |
| 233 | |
Jonathan Cameron | a34c26dc | 2011-05-18 14:41:49 +0100 | [diff] [blame] | 234 | adis16209_check_status(indio_dev); |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 235 | |
| 236 | err_ret: |
| 237 | return ret; |
| 238 | } |
| 239 | |
Jonathan Cameron | a34c26dc | 2011-05-18 14:41:49 +0100 | [diff] [blame] | 240 | static int adis16209_initial_setup(struct iio_dev *indio_dev) |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 241 | { |
| 242 | int ret; |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 243 | |
| 244 | /* Disable IRQ */ |
Jonathan Cameron | a34c26dc | 2011-05-18 14:41:49 +0100 | [diff] [blame] | 245 | ret = adis16209_set_irq(indio_dev, false); |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 246 | if (ret) { |
Jonathan Cameron | a34c26dc | 2011-05-18 14:41:49 +0100 | [diff] [blame] | 247 | dev_err(&indio_dev->dev, "disable irq failed"); |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 248 | goto err_ret; |
| 249 | } |
| 250 | |
| 251 | /* Do self test */ |
Jonathan Cameron | a34c26dc | 2011-05-18 14:41:49 +0100 | [diff] [blame] | 252 | ret = adis16209_self_test(indio_dev); |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 253 | if (ret) { |
Jonathan Cameron | a34c26dc | 2011-05-18 14:41:49 +0100 | [diff] [blame] | 254 | dev_err(&indio_dev->dev, "self test failure"); |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 255 | goto err_ret; |
| 256 | } |
| 257 | |
| 258 | /* Read status register to check the result */ |
Jonathan Cameron | a34c26dc | 2011-05-18 14:41:49 +0100 | [diff] [blame] | 259 | ret = adis16209_check_status(indio_dev); |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 260 | if (ret) { |
Jonathan Cameron | a34c26dc | 2011-05-18 14:41:49 +0100 | [diff] [blame] | 261 | adis16209_reset(indio_dev); |
| 262 | dev_err(&indio_dev->dev, "device not playing ball -> reset"); |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 263 | msleep(ADIS16209_STARTUP_DELAY); |
Jonathan Cameron | a34c26dc | 2011-05-18 14:41:49 +0100 | [diff] [blame] | 264 | ret = adis16209_check_status(indio_dev); |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 265 | if (ret) { |
Jonathan Cameron | a34c26dc | 2011-05-18 14:41:49 +0100 | [diff] [blame] | 266 | dev_err(&indio_dev->dev, "giving up"); |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 267 | goto err_ret; |
| 268 | } |
| 269 | } |
| 270 | |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 271 | err_ret: |
| 272 | return ret; |
| 273 | } |
| 274 | |
Jonathan Cameron | a34c26dc | 2011-05-18 14:41:49 +0100 | [diff] [blame] | 275 | enum adis16209_chan { |
| 276 | in_supply, |
| 277 | temp, |
| 278 | accel_x, |
| 279 | accel_y, |
| 280 | incli_x, |
| 281 | incli_y, |
| 282 | in_aux, |
| 283 | rot, |
| 284 | }; |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 285 | |
Jonathan Cameron | a34c26dc | 2011-05-18 14:41:49 +0100 | [diff] [blame] | 286 | static const u8 adis16209_addresses[8][2] = { |
| 287 | [in_supply] = { ADIS16209_SUPPLY_OUT }, |
| 288 | [in_aux] = { ADIS16209_AUX_ADC }, |
| 289 | [accel_x] = { ADIS16209_XACCL_OUT, ADIS16209_XACCL_NULL }, |
| 290 | [accel_y] = { ADIS16209_YACCL_OUT, ADIS16209_YACCL_NULL }, |
| 291 | [incli_x] = { ADIS16209_XINCL_OUT, ADIS16209_XINCL_NULL }, |
| 292 | [incli_y] = { ADIS16209_YINCL_OUT, ADIS16209_YINCL_NULL }, |
| 293 | [rot] = { ADIS16209_ROT_OUT }, |
| 294 | [temp] = { ADIS16209_TEMP_OUT }, |
| 295 | }; |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 296 | |
Jonathan Cameron | a34c26dc | 2011-05-18 14:41:49 +0100 | [diff] [blame] | 297 | static int adis16209_write_raw(struct iio_dev *indio_dev, |
| 298 | struct iio_chan_spec const *chan, |
| 299 | int val, |
| 300 | int val2, |
| 301 | long mask) |
| 302 | { |
| 303 | int bits; |
| 304 | s16 val16; |
| 305 | u8 addr; |
| 306 | switch (mask) { |
| 307 | case (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE): |
| 308 | switch (chan->type) { |
| 309 | case IIO_ACCEL: |
| 310 | case IIO_INCLI: |
| 311 | bits = 14; |
| 312 | break; |
| 313 | default: |
| 314 | return -EINVAL; |
| 315 | }; |
| 316 | val16 = val & ((1 << bits) - 1); |
| 317 | addr = adis16209_addresses[chan->address][1]; |
| 318 | return adis16209_spi_write_reg_16(indio_dev, addr, val16); |
| 319 | } |
| 320 | return -EINVAL; |
| 321 | } |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 322 | |
Jonathan Cameron | a34c26dc | 2011-05-18 14:41:49 +0100 | [diff] [blame] | 323 | static int adis16209_read_raw(struct iio_dev *indio_dev, |
| 324 | struct iio_chan_spec const *chan, |
| 325 | int *val, int *val2, |
| 326 | long mask) |
| 327 | { |
| 328 | int ret; |
| 329 | int bits; |
| 330 | u8 addr; |
| 331 | s16 val16; |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 332 | |
Jonathan Cameron | a34c26dc | 2011-05-18 14:41:49 +0100 | [diff] [blame] | 333 | switch (mask) { |
| 334 | case 0: |
| 335 | mutex_lock(&indio_dev->mlock); |
| 336 | addr = adis16209_addresses[chan->address][0]; |
| 337 | ret = adis16209_spi_read_reg_16(indio_dev, addr, &val16); |
Dan Carpenter | 8f89615 | 2011-07-30 11:45:09 +0300 | [diff] [blame] | 338 | if (ret) { |
| 339 | mutex_unlock(&indio_dev->mlock); |
Jonathan Cameron | a34c26dc | 2011-05-18 14:41:49 +0100 | [diff] [blame] | 340 | return ret; |
Dan Carpenter | 8f89615 | 2011-07-30 11:45:09 +0300 | [diff] [blame] | 341 | } |
Jonathan Cameron | a34c26dc | 2011-05-18 14:41:49 +0100 | [diff] [blame] | 342 | |
| 343 | if (val16 & ADIS16209_ERROR_ACTIVE) { |
| 344 | ret = adis16209_check_status(indio_dev); |
Dan Carpenter | 8f89615 | 2011-07-30 11:45:09 +0300 | [diff] [blame] | 345 | if (ret) { |
| 346 | mutex_unlock(&indio_dev->mlock); |
Jonathan Cameron | a34c26dc | 2011-05-18 14:41:49 +0100 | [diff] [blame] | 347 | return ret; |
Dan Carpenter | 8f89615 | 2011-07-30 11:45:09 +0300 | [diff] [blame] | 348 | } |
Jonathan Cameron | a34c26dc | 2011-05-18 14:41:49 +0100 | [diff] [blame] | 349 | } |
| 350 | val16 = val16 & ((1 << chan->scan_type.realbits) - 1); |
| 351 | if (chan->scan_type.sign == 's') |
| 352 | val16 = (s16)(val16 << |
| 353 | (16 - chan->scan_type.realbits)) >> |
| 354 | (16 - chan->scan_type.realbits); |
| 355 | *val = val16; |
| 356 | mutex_unlock(&indio_dev->mlock); |
| 357 | return IIO_VAL_INT; |
| 358 | case (1 << IIO_CHAN_INFO_SCALE_SEPARATE): |
| 359 | case (1 << IIO_CHAN_INFO_SCALE_SHARED): |
| 360 | switch (chan->type) { |
| 361 | case IIO_IN: |
| 362 | *val = 0; |
| 363 | if (chan->channel == 0) |
| 364 | *val2 = 305180; |
| 365 | else |
| 366 | *val2 = 610500; |
| 367 | return IIO_VAL_INT_PLUS_MICRO; |
| 368 | case IIO_TEMP: |
| 369 | *val = 0; |
| 370 | *val2 = -470000; |
| 371 | return IIO_VAL_INT_PLUS_MICRO; |
| 372 | case IIO_ACCEL: |
| 373 | *val = 0; |
| 374 | *val2 = 2394; |
| 375 | return IIO_VAL_INT_PLUS_MICRO; |
| 376 | case IIO_INCLI: |
| 377 | *val = 0; |
| 378 | *val2 = 436; |
| 379 | return IIO_VAL_INT_PLUS_MICRO; |
| 380 | default: |
| 381 | return -EINVAL; |
| 382 | } |
| 383 | break; |
| 384 | case (1 << IIO_CHAN_INFO_OFFSET_SEPARATE): |
| 385 | *val = 25; |
| 386 | return IIO_VAL_INT; |
| 387 | case (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE): |
| 388 | switch (chan->type) { |
| 389 | case IIO_ACCEL: |
| 390 | bits = 14; |
| 391 | break; |
| 392 | default: |
| 393 | return -EINVAL; |
| 394 | }; |
| 395 | mutex_lock(&indio_dev->mlock); |
| 396 | addr = adis16209_addresses[chan->address][1]; |
| 397 | ret = adis16209_spi_read_reg_16(indio_dev, addr, &val16); |
| 398 | if (ret) { |
| 399 | mutex_unlock(&indio_dev->mlock); |
| 400 | return ret; |
| 401 | } |
| 402 | val16 &= (1 << bits) - 1; |
| 403 | val16 = (s16)(val16 << (16 - bits)) >> (16 - bits); |
| 404 | *val = val16; |
| 405 | mutex_unlock(&indio_dev->mlock); |
| 406 | return IIO_VAL_INT; |
| 407 | } |
| 408 | return -EINVAL; |
| 409 | } |
| 410 | |
| 411 | static struct iio_chan_spec adis16209_channels[] = { |
| 412 | IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0, |
| 413 | (1 << IIO_CHAN_INFO_SCALE_SEPARATE), |
| 414 | in_supply, ADIS16209_SCAN_SUPPLY, |
| 415 | IIO_ST('u', 14, 16, 0), 0), |
| 416 | IIO_CHAN(IIO_TEMP, 0, 1, 0, NULL, 0, 0, |
| 417 | (1 << IIO_CHAN_INFO_SCALE_SEPARATE) | |
| 418 | (1 << IIO_CHAN_INFO_OFFSET_SEPARATE), |
| 419 | temp, ADIS16209_SCAN_TEMP, |
| 420 | IIO_ST('u', 12, 16, 0), 0), |
| 421 | IIO_CHAN(IIO_ACCEL, 1, 0, 0, NULL, 0, IIO_MOD_X, |
| 422 | (1 << IIO_CHAN_INFO_SCALE_SHARED) | |
| 423 | (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE), |
| 424 | accel_x, ADIS16209_SCAN_ACC_X, |
| 425 | IIO_ST('s', 14, 16, 0), 0), |
| 426 | IIO_CHAN(IIO_ACCEL, 1, 0, 0, NULL, 0, IIO_MOD_Y, |
| 427 | (1 << IIO_CHAN_INFO_SCALE_SHARED) | |
| 428 | (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE), |
| 429 | accel_y, ADIS16209_SCAN_ACC_Y, |
| 430 | IIO_ST('s', 14, 16, 0), 0), |
| 431 | IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 1, 0, |
| 432 | (1 << IIO_CHAN_INFO_SCALE_SEPARATE), |
| 433 | in_aux, ADIS16209_SCAN_AUX_ADC, |
| 434 | IIO_ST('u', 12, 16, 0), 0), |
| 435 | IIO_CHAN(IIO_INCLI, 0, 1, 0, NULL, 0, IIO_MOD_X, |
| 436 | (1 << IIO_CHAN_INFO_SCALE_SHARED), |
| 437 | incli_x, ADIS16209_SCAN_INCLI_X, |
| 438 | IIO_ST('s', 14, 16, 0), 0), |
| 439 | IIO_CHAN(IIO_INCLI, 0, 1, 0, NULL, 0, IIO_MOD_Y, |
| 440 | (1 << IIO_CHAN_INFO_SCALE_SHARED), |
| 441 | incli_y, ADIS16209_SCAN_INCLI_Y, |
| 442 | IIO_ST('s', 14, 16, 0), 0), |
| 443 | IIO_CHAN(IIO_ROT, 0, 1, 0, NULL, 0, IIO_MOD_X, |
| 444 | 0, |
| 445 | rot, ADIS16209_SCAN_ROT, |
| 446 | IIO_ST('s', 14, 16, 0), 0), |
| 447 | IIO_CHAN_SOFT_TIMESTAMP(8) |
| 448 | }; |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 449 | |
| 450 | static IIO_DEVICE_ATTR(reset, S_IWUSR, NULL, adis16209_write_reset, 0); |
| 451 | |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 452 | static struct attribute *adis16209_attributes[] = { |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 453 | &iio_dev_attr_reset.dev_attr.attr, |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 454 | NULL |
| 455 | }; |
| 456 | |
| 457 | static const struct attribute_group adis16209_attribute_group = { |
| 458 | .attrs = adis16209_attributes, |
| 459 | }; |
| 460 | |
Jonathan Cameron | 6fe8135 | 2011-05-18 14:42:37 +0100 | [diff] [blame] | 461 | static const struct iio_info adis16209_info = { |
| 462 | .attrs = &adis16209_attribute_group, |
| 463 | .read_raw = &adis16209_read_raw, |
| 464 | .write_raw = &adis16209_write_raw, |
| 465 | .driver_module = THIS_MODULE, |
| 466 | }; |
| 467 | |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 468 | static int __devinit adis16209_probe(struct spi_device *spi) |
| 469 | { |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame^] | 470 | int ret; |
Jonathan Cameron | 35212df | 2011-06-27 13:07:13 +0100 | [diff] [blame] | 471 | struct adis16209_state *st; |
| 472 | struct iio_dev *indio_dev; |
| 473 | |
| 474 | /* setup the industrialio driver allocated elements */ |
| 475 | indio_dev = iio_allocate_device(sizeof(*st)); |
| 476 | if (indio_dev == NULL) { |
| 477 | ret = -ENOMEM; |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 478 | goto error_ret; |
| 479 | } |
Jonathan Cameron | 35212df | 2011-06-27 13:07:13 +0100 | [diff] [blame] | 480 | st = iio_priv(indio_dev); |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 481 | /* this is only used for removal purposes */ |
Jonathan Cameron | 35212df | 2011-06-27 13:07:13 +0100 | [diff] [blame] | 482 | spi_set_drvdata(spi, indio_dev); |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 483 | st->us = spi; |
| 484 | mutex_init(&st->buf_lock); |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 485 | |
Jonathan Cameron | 35212df | 2011-06-27 13:07:13 +0100 | [diff] [blame] | 486 | indio_dev->name = spi->dev.driver->name; |
| 487 | indio_dev->dev.parent = &spi->dev; |
| 488 | indio_dev->info = &adis16209_info; |
| 489 | indio_dev->channels = adis16209_channels; |
| 490 | indio_dev->num_channels = ARRAY_SIZE(adis16209_channels); |
| 491 | indio_dev->modes = INDIO_DIRECT_MODE; |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 492 | |
Jonathan Cameron | 35212df | 2011-06-27 13:07:13 +0100 | [diff] [blame] | 493 | ret = adis16209_configure_ring(indio_dev); |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 494 | if (ret) |
| 495 | goto error_free_dev; |
| 496 | |
Jonathan Cameron | c009f7e | 2011-08-30 12:41:14 +0100 | [diff] [blame] | 497 | ret = iio_ring_buffer_register(indio_dev, |
| 498 | adis16209_channels, |
| 499 | ARRAY_SIZE(adis16209_channels)); |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 500 | if (ret) { |
| 501 | printk(KERN_ERR "failed to initialize the ring\n"); |
| 502 | goto error_unreg_ring_funcs; |
| 503 | } |
| 504 | |
| 505 | if (spi->irq) { |
Jonathan Cameron | 35212df | 2011-06-27 13:07:13 +0100 | [diff] [blame] | 506 | ret = adis16209_probe_trigger(indio_dev); |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 507 | if (ret) |
Jonathan Cameron | 48f2719 | 2011-04-18 12:59:05 +0100 | [diff] [blame] | 508 | goto error_uninitialize_ring; |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 509 | } |
| 510 | |
| 511 | /* Get the device into a sane initial state */ |
Jonathan Cameron | 35212df | 2011-06-27 13:07:13 +0100 | [diff] [blame] | 512 | ret = adis16209_initial_setup(indio_dev); |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 513 | if (ret) |
| 514 | goto error_remove_trigger; |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame^] | 515 | ret = iio_device_register(indio_dev); |
| 516 | if (ret) |
| 517 | goto error_remove_trigger; |
| 518 | |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 519 | return 0; |
| 520 | |
| 521 | error_remove_trigger: |
Jonathan Cameron | 35212df | 2011-06-27 13:07:13 +0100 | [diff] [blame] | 522 | adis16209_remove_trigger(indio_dev); |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 523 | error_uninitialize_ring: |
Jonathan Cameron | 1aa0427 | 2011-08-30 12:32:47 +0100 | [diff] [blame] | 524 | iio_ring_buffer_unregister(indio_dev); |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 525 | error_unreg_ring_funcs: |
Jonathan Cameron | 35212df | 2011-06-27 13:07:13 +0100 | [diff] [blame] | 526 | adis16209_unconfigure_ring(indio_dev); |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 527 | error_free_dev: |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame^] | 528 | iio_free_device(indio_dev); |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 529 | error_ret: |
| 530 | return ret; |
| 531 | } |
| 532 | |
| 533 | static int adis16209_remove(struct spi_device *spi) |
| 534 | { |
Jonathan Cameron | 35212df | 2011-06-27 13:07:13 +0100 | [diff] [blame] | 535 | struct iio_dev *indio_dev = spi_get_drvdata(spi); |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 536 | |
| 537 | flush_scheduled_work(); |
| 538 | |
| 539 | adis16209_remove_trigger(indio_dev); |
Jonathan Cameron | 1aa0427 | 2011-08-30 12:32:47 +0100 | [diff] [blame] | 540 | iio_ring_buffer_unregister(indio_dev); |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 541 | adis16209_unconfigure_ring(indio_dev); |
Jonathan Cameron | 3e39440 | 2011-08-30 12:41:18 +0100 | [diff] [blame] | 542 | iio_device_unregister(indio_dev); |
Barry Song | 671ece1 | 2010-05-07 15:38:59 +0100 | [diff] [blame] | 543 | |
| 544 | return 0; |
| 545 | } |
| 546 | |
| 547 | static struct spi_driver adis16209_driver = { |
| 548 | .driver = { |
| 549 | .name = "adis16209", |
| 550 | .owner = THIS_MODULE, |
| 551 | }, |
| 552 | .probe = adis16209_probe, |
| 553 | .remove = __devexit_p(adis16209_remove), |
| 554 | }; |
| 555 | |
| 556 | static __init int adis16209_init(void) |
| 557 | { |
| 558 | return spi_register_driver(&adis16209_driver); |
| 559 | } |
| 560 | module_init(adis16209_init); |
| 561 | |
| 562 | static __exit void adis16209_exit(void) |
| 563 | { |
| 564 | spi_unregister_driver(&adis16209_driver); |
| 565 | } |
| 566 | module_exit(adis16209_exit); |
| 567 | |
| 568 | MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>"); |
| 569 | MODULE_DESCRIPTION("Analog Devices ADIS16209 Digital Vibration Sensor driver"); |
| 570 | MODULE_LICENSE("GPL v2"); |