Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 1 | /* |
| 2 | * ADIS16204 Programmable High-g Digital Impact Sensor and Recorder |
| 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/irq.h> |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 11 | #include <linux/delay.h> |
| 12 | #include <linux/mutex.h> |
| 13 | #include <linux/device.h> |
| 14 | #include <linux/kernel.h> |
| 15 | #include <linux/spi/spi.h> |
| 16 | #include <linux/slab.h> |
| 17 | #include <linux/sysfs.h> |
| 18 | #include <linux/list.h> |
Paul Gortmaker | 99c9785 | 2011-07-03 15:49:50 -0400 | [diff] [blame] | 19 | #include <linux/module.h> |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 20 | |
| 21 | #include "../iio.h" |
| 22 | #include "../sysfs.h" |
Jonathan Cameron | af5046a | 2011-10-26 17:41:32 +0100 | [diff] [blame^] | 23 | #include "../buffer.h" |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 24 | |
| 25 | #include "adis16204.h" |
| 26 | |
| 27 | #define DRIVER_NAME "adis16204" |
| 28 | |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 29 | /** |
| 30 | * adis16204_spi_write_reg_8() - write single byte to a register |
| 31 | * @dev: device associated with child of actual device (iio_dev or iio_trig) |
| 32 | * @reg_address: the address of the register to be written |
| 33 | * @val: the value to write |
| 34 | **/ |
Jonathan Cameron | ad3eb9a | 2011-05-18 14:41:48 +0100 | [diff] [blame] | 35 | static int adis16204_spi_write_reg_8(struct iio_dev *indio_dev, |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 36 | u8 reg_address, |
| 37 | u8 val) |
| 38 | { |
| 39 | int ret; |
Jonathan Cameron | 4de66bb | 2011-06-27 13:07:12 +0100 | [diff] [blame] | 40 | struct adis16204_state *st = iio_priv(indio_dev); |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 41 | |
| 42 | mutex_lock(&st->buf_lock); |
| 43 | st->tx[0] = ADIS16204_WRITE_REG(reg_address); |
| 44 | st->tx[1] = val; |
| 45 | |
| 46 | ret = spi_write(st->us, st->tx, 2); |
| 47 | mutex_unlock(&st->buf_lock); |
| 48 | |
| 49 | return ret; |
| 50 | } |
| 51 | |
| 52 | /** |
| 53 | * adis16204_spi_write_reg_16() - write 2 bytes to a pair of registers |
Jonathan Cameron | ad3eb9a | 2011-05-18 14:41:48 +0100 | [diff] [blame] | 54 | * @indio_dev: iio device associated with child of actual device |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 55 | * @reg_address: the address of the lower of the two registers. Second register |
| 56 | * is assumed to have address one greater. |
| 57 | * @val: value to be written |
| 58 | **/ |
Jonathan Cameron | ad3eb9a | 2011-05-18 14:41:48 +0100 | [diff] [blame] | 59 | static int adis16204_spi_write_reg_16(struct iio_dev *indio_dev, |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 60 | u8 lower_reg_address, |
| 61 | u16 value) |
| 62 | { |
| 63 | int ret; |
| 64 | struct spi_message msg; |
Jonathan Cameron | 4de66bb | 2011-06-27 13:07:12 +0100 | [diff] [blame] | 65 | struct adis16204_state *st = iio_priv(indio_dev); |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 66 | struct spi_transfer xfers[] = { |
| 67 | { |
| 68 | .tx_buf = st->tx, |
| 69 | .bits_per_word = 8, |
| 70 | .len = 2, |
| 71 | .cs_change = 1, |
| 72 | }, { |
| 73 | .tx_buf = st->tx + 2, |
| 74 | .bits_per_word = 8, |
| 75 | .len = 2, |
| 76 | .cs_change = 1, |
| 77 | }, |
| 78 | }; |
| 79 | |
| 80 | mutex_lock(&st->buf_lock); |
| 81 | st->tx[0] = ADIS16204_WRITE_REG(lower_reg_address); |
| 82 | st->tx[1] = value & 0xFF; |
| 83 | st->tx[2] = ADIS16204_WRITE_REG(lower_reg_address + 1); |
| 84 | st->tx[3] = (value >> 8) & 0xFF; |
| 85 | |
| 86 | spi_message_init(&msg); |
| 87 | spi_message_add_tail(&xfers[0], &msg); |
| 88 | spi_message_add_tail(&xfers[1], &msg); |
| 89 | ret = spi_sync(st->us, &msg); |
| 90 | mutex_unlock(&st->buf_lock); |
| 91 | |
| 92 | return ret; |
| 93 | } |
| 94 | |
| 95 | /** |
| 96 | * adis16204_spi_read_reg_16() - read 2 bytes from a 16-bit register |
Jonathan Cameron | ad3eb9a | 2011-05-18 14:41:48 +0100 | [diff] [blame] | 97 | * @indio_dev: iio device associated with child of actual device |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 98 | * @reg_address: the address of the lower of the two registers. Second register |
| 99 | * is assumed to have address one greater. |
| 100 | * @val: somewhere to pass back the value read |
| 101 | **/ |
Jonathan Cameron | ad3eb9a | 2011-05-18 14:41:48 +0100 | [diff] [blame] | 102 | static int adis16204_spi_read_reg_16(struct iio_dev *indio_dev, |
| 103 | u8 lower_reg_address, |
| 104 | u16 *val) |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 105 | { |
| 106 | struct spi_message msg; |
Jonathan Cameron | 4de66bb | 2011-06-27 13:07:12 +0100 | [diff] [blame] | 107 | struct adis16204_state *st = iio_priv(indio_dev); |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 108 | int ret; |
| 109 | struct spi_transfer xfers[] = { |
| 110 | { |
| 111 | .tx_buf = st->tx, |
| 112 | .bits_per_word = 8, |
| 113 | .len = 2, |
| 114 | .cs_change = 1, |
| 115 | .delay_usecs = 20, |
| 116 | }, { |
| 117 | .rx_buf = st->rx, |
| 118 | .bits_per_word = 8, |
| 119 | .len = 2, |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 120 | .delay_usecs = 20, |
| 121 | }, |
| 122 | }; |
| 123 | |
| 124 | mutex_lock(&st->buf_lock); |
| 125 | st->tx[0] = ADIS16204_READ_REG(lower_reg_address); |
| 126 | st->tx[1] = 0; |
| 127 | |
| 128 | spi_message_init(&msg); |
| 129 | spi_message_add_tail(&xfers[0], &msg); |
| 130 | spi_message_add_tail(&xfers[1], &msg); |
| 131 | ret = spi_sync(st->us, &msg); |
| 132 | if (ret) { |
| 133 | dev_err(&st->us->dev, "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 | ad3eb9a | 2011-05-18 14:41:48 +0100 | [diff] [blame] | 144 | static int adis16204_check_status(struct iio_dev *indio_dev) |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 145 | { |
Jonathan Cameron | ad3eb9a | 2011-05-18 14:41:48 +0100 | [diff] [blame] | 146 | u16 status; |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 147 | int ret; |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 148 | |
Jonathan Cameron | ad3eb9a | 2011-05-18 14:41:48 +0100 | [diff] [blame] | 149 | ret = adis16204_spi_read_reg_16(indio_dev, |
| 150 | ADIS16204_DIAG_STAT, &status); |
| 151 | if (ret < 0) { |
| 152 | dev_err(&indio_dev->dev, "Reading status failed\n"); |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 153 | goto error_ret; |
Jonathan Cameron | ad3eb9a | 2011-05-18 14:41:48 +0100 | [diff] [blame] | 154 | } |
| 155 | ret = status & 0x1F; |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 156 | |
Jonathan Cameron | ad3eb9a | 2011-05-18 14:41:48 +0100 | [diff] [blame] | 157 | if (status & ADIS16204_DIAG_STAT_SELFTEST_FAIL) |
| 158 | dev_err(&indio_dev->dev, "Self test failure\n"); |
| 159 | if (status & ADIS16204_DIAG_STAT_SPI_FAIL) |
| 160 | dev_err(&indio_dev->dev, "SPI failure\n"); |
| 161 | if (status & ADIS16204_DIAG_STAT_FLASH_UPT) |
| 162 | dev_err(&indio_dev->dev, "Flash update failed\n"); |
| 163 | if (status & ADIS16204_DIAG_STAT_POWER_HIGH) |
| 164 | dev_err(&indio_dev->dev, "Power supply above 3.625V\n"); |
| 165 | if (status & ADIS16204_DIAG_STAT_POWER_LOW) |
| 166 | dev_err(&indio_dev->dev, "Power supply below 2.975V\n"); |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 167 | |
| 168 | error_ret: |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 169 | return ret; |
| 170 | } |
| 171 | |
| 172 | static ssize_t adis16204_read_14bit_signed(struct device *dev, |
| 173 | struct device_attribute *attr, |
| 174 | char *buf) |
| 175 | { |
| 176 | struct iio_dev *indio_dev = dev_get_drvdata(dev); |
| 177 | struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); |
| 178 | s16 val = 0; |
| 179 | ssize_t ret; |
| 180 | |
| 181 | mutex_lock(&indio_dev->mlock); |
| 182 | |
Jonathan Cameron | ad3eb9a | 2011-05-18 14:41:48 +0100 | [diff] [blame] | 183 | ret = adis16204_spi_read_reg_16(indio_dev, |
| 184 | this_attr->address, (u16 *)&val); |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 185 | if (!ret) { |
| 186 | if (val & ADIS16204_ERROR_ACTIVE) |
Jonathan Cameron | ad3eb9a | 2011-05-18 14:41:48 +0100 | [diff] [blame] | 187 | adis16204_check_status(indio_dev); |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 188 | |
| 189 | val = ((s16)(val << 2) >> 2); |
| 190 | ret = sprintf(buf, "%d\n", val); |
| 191 | } |
| 192 | |
| 193 | mutex_unlock(&indio_dev->mlock); |
| 194 | |
| 195 | return ret; |
| 196 | } |
| 197 | |
Jonathan Cameron | ad3eb9a | 2011-05-18 14:41:48 +0100 | [diff] [blame] | 198 | static int adis16204_reset(struct iio_dev *indio_dev) |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 199 | { |
| 200 | int ret; |
Jonathan Cameron | ad3eb9a | 2011-05-18 14:41:48 +0100 | [diff] [blame] | 201 | ret = adis16204_spi_write_reg_8(indio_dev, |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 202 | ADIS16204_GLOB_CMD, |
| 203 | ADIS16204_GLOB_CMD_SW_RESET); |
| 204 | if (ret) |
Jonathan Cameron | ad3eb9a | 2011-05-18 14:41:48 +0100 | [diff] [blame] | 205 | dev_err(&indio_dev->dev, "problem resetting device"); |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 206 | |
| 207 | return ret; |
| 208 | } |
| 209 | |
| 210 | static ssize_t adis16204_write_reset(struct device *dev, |
| 211 | struct device_attribute *attr, |
| 212 | const char *buf, size_t len) |
| 213 | { |
Jonathan Cameron | ad3eb9a | 2011-05-18 14:41:48 +0100 | [diff] [blame] | 214 | struct iio_dev *indio_dev = dev_get_drvdata(dev); |
| 215 | |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 216 | if (len < 1) |
| 217 | return -EINVAL; |
| 218 | switch (buf[0]) { |
| 219 | case '1': |
| 220 | case 'y': |
| 221 | case 'Y': |
Jonathan Cameron | ad3eb9a | 2011-05-18 14:41:48 +0100 | [diff] [blame] | 222 | return adis16204_reset(indio_dev); |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 223 | } |
| 224 | return -EINVAL; |
| 225 | } |
| 226 | |
Jonathan Cameron | ad3eb9a | 2011-05-18 14:41:48 +0100 | [diff] [blame] | 227 | int adis16204_set_irq(struct iio_dev *indio_dev, bool enable) |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 228 | { |
| 229 | int ret = 0; |
| 230 | u16 msc; |
| 231 | |
Jonathan Cameron | ad3eb9a | 2011-05-18 14:41:48 +0100 | [diff] [blame] | 232 | ret = adis16204_spi_read_reg_16(indio_dev, ADIS16204_MSC_CTRL, &msc); |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 233 | if (ret) |
| 234 | goto error_ret; |
| 235 | |
| 236 | msc |= ADIS16204_MSC_CTRL_ACTIVE_HIGH; |
| 237 | msc &= ~ADIS16204_MSC_CTRL_DATA_RDY_DIO2; |
| 238 | if (enable) |
| 239 | msc |= ADIS16204_MSC_CTRL_DATA_RDY_EN; |
| 240 | else |
| 241 | msc &= ~ADIS16204_MSC_CTRL_DATA_RDY_EN; |
| 242 | |
Jonathan Cameron | ad3eb9a | 2011-05-18 14:41:48 +0100 | [diff] [blame] | 243 | ret = adis16204_spi_write_reg_16(indio_dev, ADIS16204_MSC_CTRL, msc); |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 244 | |
| 245 | error_ret: |
| 246 | return ret; |
| 247 | } |
| 248 | |
Jonathan Cameron | ad3eb9a | 2011-05-18 14:41:48 +0100 | [diff] [blame] | 249 | static int adis16204_self_test(struct iio_dev *indio_dev) |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 250 | { |
| 251 | int ret; |
Jonathan Cameron | ad3eb9a | 2011-05-18 14:41:48 +0100 | [diff] [blame] | 252 | ret = adis16204_spi_write_reg_16(indio_dev, |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 253 | ADIS16204_MSC_CTRL, |
| 254 | ADIS16204_MSC_CTRL_SELF_TEST_EN); |
| 255 | if (ret) { |
Jonathan Cameron | ad3eb9a | 2011-05-18 14:41:48 +0100 | [diff] [blame] | 256 | dev_err(&indio_dev->dev, "problem starting self test"); |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 257 | goto err_ret; |
| 258 | } |
| 259 | |
Jonathan Cameron | ad3eb9a | 2011-05-18 14:41:48 +0100 | [diff] [blame] | 260 | adis16204_check_status(indio_dev); |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 261 | |
| 262 | err_ret: |
| 263 | return ret; |
| 264 | } |
| 265 | |
Jonathan Cameron | ad3eb9a | 2011-05-18 14:41:48 +0100 | [diff] [blame] | 266 | static int adis16204_initial_setup(struct iio_dev *indio_dev) |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 267 | { |
| 268 | int ret; |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 269 | |
| 270 | /* Disable IRQ */ |
Jonathan Cameron | ad3eb9a | 2011-05-18 14:41:48 +0100 | [diff] [blame] | 271 | ret = adis16204_set_irq(indio_dev, false); |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 272 | if (ret) { |
Jonathan Cameron | ad3eb9a | 2011-05-18 14:41:48 +0100 | [diff] [blame] | 273 | dev_err(&indio_dev->dev, "disable irq failed"); |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 274 | goto err_ret; |
| 275 | } |
| 276 | |
| 277 | /* Do self test */ |
Jonathan Cameron | ad3eb9a | 2011-05-18 14:41:48 +0100 | [diff] [blame] | 278 | ret = adis16204_self_test(indio_dev); |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 279 | if (ret) { |
Jonathan Cameron | ad3eb9a | 2011-05-18 14:41:48 +0100 | [diff] [blame] | 280 | dev_err(&indio_dev->dev, "self test failure"); |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 281 | goto err_ret; |
| 282 | } |
| 283 | |
| 284 | /* Read status register to check the result */ |
Jonathan Cameron | ad3eb9a | 2011-05-18 14:41:48 +0100 | [diff] [blame] | 285 | ret = adis16204_check_status(indio_dev); |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 286 | if (ret) { |
Jonathan Cameron | ad3eb9a | 2011-05-18 14:41:48 +0100 | [diff] [blame] | 287 | adis16204_reset(indio_dev); |
| 288 | dev_err(&indio_dev->dev, "device not playing ball -> reset"); |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 289 | msleep(ADIS16204_STARTUP_DELAY); |
Jonathan Cameron | ad3eb9a | 2011-05-18 14:41:48 +0100 | [diff] [blame] | 290 | ret = adis16204_check_status(indio_dev); |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 291 | if (ret) { |
Jonathan Cameron | ad3eb9a | 2011-05-18 14:41:48 +0100 | [diff] [blame] | 292 | dev_err(&indio_dev->dev, "giving up"); |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 293 | goto err_ret; |
| 294 | } |
| 295 | } |
| 296 | |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 297 | err_ret: |
| 298 | return ret; |
| 299 | } |
Jonathan Cameron | c9b9e49 | 2011-08-12 17:48:01 +0100 | [diff] [blame] | 300 | |
| 301 | /* Unique to this driver currently */ |
| 302 | #define IIO_DEV_ATTR_ACCEL_XY(_show, _addr) \ |
Jonathan Cameron | 322c956 | 2011-09-14 13:01:23 +0100 | [diff] [blame] | 303 | IIO_DEVICE_ATTR(in_accel_xy, S_IRUGO, _show, NULL, _addr) |
Jonathan Cameron | c9b9e49 | 2011-08-12 17:48:01 +0100 | [diff] [blame] | 304 | #define IIO_DEV_ATTR_ACCEL_XYPEAK(_show, _addr) \ |
Jonathan Cameron | 322c956 | 2011-09-14 13:01:23 +0100 | [diff] [blame] | 305 | IIO_DEVICE_ATTR(in_accel_xypeak, S_IRUGO, _show, NULL, _addr) |
Jonathan Cameron | c9b9e49 | 2011-08-12 17:48:01 +0100 | [diff] [blame] | 306 | |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 307 | static IIO_DEV_ATTR_ACCEL_XY(adis16204_read_14bit_signed, |
| 308 | ADIS16204_XY_RSS_OUT); |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 309 | static IIO_DEV_ATTR_ACCEL_XYPEAK(adis16204_read_14bit_signed, |
| 310 | ADIS16204_XY_PEAK_OUT); |
Jonathan Cameron | 322c956 | 2011-09-14 13:01:23 +0100 | [diff] [blame] | 311 | static IIO_CONST_ATTR(in_accel_xy_scale, "0.017125"); |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 312 | |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 313 | static IIO_DEVICE_ATTR(reset, S_IWUSR, NULL, adis16204_write_reset, 0); |
| 314 | |
Jonathan Cameron | ad3eb9a | 2011-05-18 14:41:48 +0100 | [diff] [blame] | 315 | enum adis16204_channel { |
| 316 | in_supply, |
| 317 | in_aux, |
| 318 | temp, |
| 319 | accel_x, |
| 320 | accel_y, |
| 321 | }; |
| 322 | |
Jonathan Cameron | c9b9e49 | 2011-08-12 17:48:01 +0100 | [diff] [blame] | 323 | static u8 adis16204_addresses[5][3] = { |
Jonathan Cameron | ad3eb9a | 2011-05-18 14:41:48 +0100 | [diff] [blame] | 324 | [in_supply] = { ADIS16204_SUPPLY_OUT }, |
| 325 | [in_aux] = { ADIS16204_AUX_ADC }, |
| 326 | [temp] = { ADIS16204_TEMP_OUT }, |
Jonathan Cameron | c9b9e49 | 2011-08-12 17:48:01 +0100 | [diff] [blame] | 327 | [accel_x] = { ADIS16204_XACCL_OUT, ADIS16204_XACCL_NULL, |
| 328 | ADIS16204_X_PEAK_OUT }, |
| 329 | [accel_y] = { ADIS16204_XACCL_OUT, ADIS16204_YACCL_NULL, |
| 330 | ADIS16204_Y_PEAK_OUT }, |
Jonathan Cameron | ad3eb9a | 2011-05-18 14:41:48 +0100 | [diff] [blame] | 331 | }; |
Jonathan Cameron | c9b9e49 | 2011-08-12 17:48:01 +0100 | [diff] [blame] | 332 | |
Jonathan Cameron | ad3eb9a | 2011-05-18 14:41:48 +0100 | [diff] [blame] | 333 | static int adis16204_read_raw(struct iio_dev *indio_dev, |
| 334 | struct iio_chan_spec const *chan, |
| 335 | int *val, int *val2, |
| 336 | long mask) |
| 337 | { |
| 338 | int ret; |
| 339 | int bits; |
| 340 | u8 addr; |
| 341 | s16 val16; |
Jonathan Cameron | c9b9e49 | 2011-08-12 17:48:01 +0100 | [diff] [blame] | 342 | int addrind; |
Jonathan Cameron | ad3eb9a | 2011-05-18 14:41:48 +0100 | [diff] [blame] | 343 | |
| 344 | switch (mask) { |
| 345 | case 0: |
| 346 | mutex_lock(&indio_dev->mlock); |
| 347 | addr = adis16204_addresses[chan->address][0]; |
| 348 | ret = adis16204_spi_read_reg_16(indio_dev, addr, &val16); |
Dan Carpenter | 8f89615 | 2011-07-30 11:45:09 +0300 | [diff] [blame] | 349 | if (ret) { |
| 350 | mutex_unlock(&indio_dev->mlock); |
Jonathan Cameron | ad3eb9a | 2011-05-18 14:41:48 +0100 | [diff] [blame] | 351 | return ret; |
Dan Carpenter | 8f89615 | 2011-07-30 11:45:09 +0300 | [diff] [blame] | 352 | } |
Jonathan Cameron | ad3eb9a | 2011-05-18 14:41:48 +0100 | [diff] [blame] | 353 | |
| 354 | if (val16 & ADIS16204_ERROR_ACTIVE) { |
| 355 | ret = adis16204_check_status(indio_dev); |
Dan Carpenter | 8f89615 | 2011-07-30 11:45:09 +0300 | [diff] [blame] | 356 | if (ret) { |
| 357 | mutex_unlock(&indio_dev->mlock); |
Jonathan Cameron | ad3eb9a | 2011-05-18 14:41:48 +0100 | [diff] [blame] | 358 | return ret; |
Dan Carpenter | 8f89615 | 2011-07-30 11:45:09 +0300 | [diff] [blame] | 359 | } |
Jonathan Cameron | ad3eb9a | 2011-05-18 14:41:48 +0100 | [diff] [blame] | 360 | } |
| 361 | val16 = val16 & ((1 << chan->scan_type.realbits) - 1); |
| 362 | if (chan->scan_type.sign == 's') |
| 363 | val16 = (s16)(val16 << |
| 364 | (16 - chan->scan_type.realbits)) >> |
| 365 | (16 - chan->scan_type.realbits); |
| 366 | *val = val16; |
| 367 | mutex_unlock(&indio_dev->mlock); |
| 368 | return IIO_VAL_INT; |
| 369 | case (1 << IIO_CHAN_INFO_SCALE_SEPARATE): |
| 370 | switch (chan->type) { |
Jonathan Cameron | 6835cb6 | 2011-09-27 09:56:41 +0100 | [diff] [blame] | 371 | case IIO_VOLTAGE: |
Jonathan Cameron | ad3eb9a | 2011-05-18 14:41:48 +0100 | [diff] [blame] | 372 | *val = 0; |
| 373 | if (chan->channel == 0) |
| 374 | *val2 = 1220; |
| 375 | else |
| 376 | *val2 = 610; |
| 377 | return IIO_VAL_INT_PLUS_MICRO; |
| 378 | case IIO_TEMP: |
| 379 | *val = 0; |
| 380 | *val2 = -470000; |
| 381 | return IIO_VAL_INT_PLUS_MICRO; |
| 382 | case IIO_ACCEL: |
| 383 | *val = 0; |
| 384 | if (chan->channel == 'x') |
| 385 | *val2 = 17125; |
| 386 | else |
| 387 | *val2 = 8407; |
| 388 | return IIO_VAL_INT_PLUS_MICRO; |
| 389 | default: |
| 390 | return -EINVAL; |
| 391 | } |
| 392 | break; |
| 393 | case (1 << IIO_CHAN_INFO_OFFSET_SEPARATE): |
| 394 | *val = 25; |
| 395 | return IIO_VAL_INT; |
| 396 | case (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE): |
Jonathan Cameron | c9b9e49 | 2011-08-12 17:48:01 +0100 | [diff] [blame] | 397 | case (1 << IIO_CHAN_INFO_PEAK_SEPARATE): |
| 398 | if (mask == (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE)) { |
Jonathan Cameron | ad3eb9a | 2011-05-18 14:41:48 +0100 | [diff] [blame] | 399 | bits = 12; |
Jonathan Cameron | c9b9e49 | 2011-08-12 17:48:01 +0100 | [diff] [blame] | 400 | addrind = 1; |
| 401 | } else { /* PEAK_SEPARATE */ |
| 402 | bits = 14; |
| 403 | addrind = 2; |
| 404 | } |
Jonathan Cameron | ad3eb9a | 2011-05-18 14:41:48 +0100 | [diff] [blame] | 405 | mutex_lock(&indio_dev->mlock); |
Jonathan Cameron | c9b9e49 | 2011-08-12 17:48:01 +0100 | [diff] [blame] | 406 | addr = adis16204_addresses[chan->address][addrind]; |
Jonathan Cameron | ad3eb9a | 2011-05-18 14:41:48 +0100 | [diff] [blame] | 407 | ret = adis16204_spi_read_reg_16(indio_dev, addr, &val16); |
| 408 | if (ret) { |
| 409 | mutex_unlock(&indio_dev->mlock); |
| 410 | return ret; |
| 411 | } |
| 412 | val16 &= (1 << bits) - 1; |
| 413 | val16 = (s16)(val16 << (16 - bits)) >> (16 - bits); |
| 414 | *val = val16; |
| 415 | mutex_unlock(&indio_dev->mlock); |
| 416 | return IIO_VAL_INT; |
| 417 | } |
| 418 | return -EINVAL; |
| 419 | } |
| 420 | |
| 421 | static int adis16204_write_raw(struct iio_dev *indio_dev, |
| 422 | struct iio_chan_spec const *chan, |
| 423 | int val, |
| 424 | int val2, |
| 425 | long mask) |
| 426 | { |
| 427 | int bits; |
| 428 | s16 val16; |
| 429 | u8 addr; |
| 430 | switch (mask) { |
| 431 | case (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE): |
| 432 | switch (chan->type) { |
| 433 | case IIO_ACCEL: |
| 434 | bits = 12; |
| 435 | break; |
| 436 | default: |
| 437 | return -EINVAL; |
| 438 | }; |
| 439 | val16 = val & ((1 << bits) - 1); |
| 440 | addr = adis16204_addresses[chan->address][1]; |
| 441 | return adis16204_spi_write_reg_16(indio_dev, addr, val16); |
| 442 | } |
| 443 | return -EINVAL; |
| 444 | } |
| 445 | |
| 446 | static struct iio_chan_spec adis16204_channels[] = { |
Jonathan Cameron | 6835cb6 | 2011-09-27 09:56:41 +0100 | [diff] [blame] | 447 | IIO_CHAN(IIO_VOLTAGE, 0, 0, 0, "supply", 0, 0, |
Jonathan Cameron | ad3eb9a | 2011-05-18 14:41:48 +0100 | [diff] [blame] | 448 | (1 << IIO_CHAN_INFO_SCALE_SEPARATE), |
| 449 | in_supply, ADIS16204_SCAN_SUPPLY, |
| 450 | IIO_ST('u', 12, 16, 0), 0), |
Jonathan Cameron | 6835cb6 | 2011-09-27 09:56:41 +0100 | [diff] [blame] | 451 | IIO_CHAN(IIO_VOLTAGE, 0, 1, 0, NULL, 1, 0, |
Jonathan Cameron | ad3eb9a | 2011-05-18 14:41:48 +0100 | [diff] [blame] | 452 | (1 << IIO_CHAN_INFO_SCALE_SEPARATE), |
| 453 | in_aux, ADIS16204_SCAN_AUX_ADC, |
| 454 | IIO_ST('u', 12, 16, 0), 0), |
| 455 | IIO_CHAN(IIO_TEMP, 0, 1, 0, NULL, 0, 0, |
| 456 | (1 << IIO_CHAN_INFO_SCALE_SEPARATE) | |
| 457 | (1 << IIO_CHAN_INFO_OFFSET_SEPARATE), |
| 458 | temp, ADIS16204_SCAN_TEMP, |
| 459 | IIO_ST('u', 12, 16, 0), 0), |
| 460 | IIO_CHAN(IIO_ACCEL, 1, 0, 0, NULL, 0, IIO_MOD_X, |
| 461 | (1 << IIO_CHAN_INFO_SCALE_SEPARATE) | |
Jonathan Cameron | c9b9e49 | 2011-08-12 17:48:01 +0100 | [diff] [blame] | 462 | (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE) | |
| 463 | (1 << IIO_CHAN_INFO_PEAK_SEPARATE), |
Jonathan Cameron | ad3eb9a | 2011-05-18 14:41:48 +0100 | [diff] [blame] | 464 | accel_x, ADIS16204_SCAN_ACC_X, |
| 465 | IIO_ST('s', 14, 16, 0), 0), |
| 466 | IIO_CHAN(IIO_ACCEL, 1, 0, 0, NULL, 0, IIO_MOD_Y, |
| 467 | (1 << IIO_CHAN_INFO_SCALE_SEPARATE) | |
Jonathan Cameron | c9b9e49 | 2011-08-12 17:48:01 +0100 | [diff] [blame] | 468 | (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE) | |
| 469 | (1 << IIO_CHAN_INFO_PEAK_SEPARATE), |
Jonathan Cameron | ad3eb9a | 2011-05-18 14:41:48 +0100 | [diff] [blame] | 470 | accel_y, ADIS16204_SCAN_ACC_Y, |
| 471 | IIO_ST('s', 14, 16, 0), 0), |
| 472 | IIO_CHAN_SOFT_TIMESTAMP(5), |
| 473 | }; |
Jonathan Cameron | c9b9e49 | 2011-08-12 17:48:01 +0100 | [diff] [blame] | 474 | |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 475 | static struct attribute *adis16204_attributes[] = { |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 476 | &iio_dev_attr_reset.dev_attr.attr, |
Jonathan Cameron | 322c956 | 2011-09-14 13:01:23 +0100 | [diff] [blame] | 477 | &iio_dev_attr_in_accel_xy.dev_attr.attr, |
| 478 | &iio_dev_attr_in_accel_xypeak.dev_attr.attr, |
| 479 | &iio_const_attr_in_accel_xy_scale.dev_attr.attr, |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 480 | NULL |
| 481 | }; |
| 482 | |
| 483 | static const struct attribute_group adis16204_attribute_group = { |
| 484 | .attrs = adis16204_attributes, |
| 485 | }; |
| 486 | |
Jonathan Cameron | 6fe8135 | 2011-05-18 14:42:37 +0100 | [diff] [blame] | 487 | static const struct iio_info adis16204_info = { |
| 488 | .attrs = &adis16204_attribute_group, |
| 489 | .read_raw = &adis16204_read_raw, |
| 490 | .write_raw = &adis16204_write_raw, |
| 491 | .driver_module = THIS_MODULE, |
| 492 | }; |
| 493 | |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 494 | static int __devinit adis16204_probe(struct spi_device *spi) |
| 495 | { |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 496 | int ret; |
Jonathan Cameron | 4de66bb | 2011-06-27 13:07:12 +0100 | [diff] [blame] | 497 | struct adis16204_state *st; |
| 498 | struct iio_dev *indio_dev; |
| 499 | |
| 500 | /* setup the industrialio driver allocated elements */ |
| 501 | indio_dev = iio_allocate_device(sizeof(*st)); |
| 502 | if (indio_dev == NULL) { |
| 503 | ret = -ENOMEM; |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 504 | goto error_ret; |
| 505 | } |
Jonathan Cameron | 4de66bb | 2011-06-27 13:07:12 +0100 | [diff] [blame] | 506 | st = iio_priv(indio_dev); |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 507 | /* this is only used for removal purposes */ |
Jonathan Cameron | 4de66bb | 2011-06-27 13:07:12 +0100 | [diff] [blame] | 508 | spi_set_drvdata(spi, indio_dev); |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 509 | st->us = spi; |
| 510 | mutex_init(&st->buf_lock); |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 511 | |
Jonathan Cameron | 4de66bb | 2011-06-27 13:07:12 +0100 | [diff] [blame] | 512 | indio_dev->name = spi->dev.driver->name; |
| 513 | indio_dev->dev.parent = &spi->dev; |
| 514 | indio_dev->info = &adis16204_info; |
| 515 | indio_dev->channels = adis16204_channels; |
| 516 | indio_dev->num_channels = ARRAY_SIZE(adis16204_channels); |
| 517 | indio_dev->modes = INDIO_DIRECT_MODE; |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 518 | |
Jonathan Cameron | 4de66bb | 2011-06-27 13:07:12 +0100 | [diff] [blame] | 519 | ret = adis16204_configure_ring(indio_dev); |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 520 | if (ret) |
| 521 | goto error_free_dev; |
| 522 | |
Jonathan Cameron | 14555b1 | 2011-09-21 11:15:57 +0100 | [diff] [blame] | 523 | ret = iio_buffer_register(indio_dev, |
| 524 | adis16204_channels, |
| 525 | ARRAY_SIZE(adis16204_channels)); |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 526 | if (ret) { |
| 527 | printk(KERN_ERR "failed to initialize the ring\n"); |
| 528 | goto error_unreg_ring_funcs; |
| 529 | } |
| 530 | |
| 531 | if (spi->irq) { |
Jonathan Cameron | 4de66bb | 2011-06-27 13:07:12 +0100 | [diff] [blame] | 532 | ret = adis16204_probe_trigger(indio_dev); |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 533 | if (ret) |
Jonathan Cameron | 37f9d27 | 2011-04-18 12:59:02 +0100 | [diff] [blame] | 534 | goto error_uninitialize_ring; |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 535 | } |
| 536 | |
| 537 | /* Get the device into a sane initial state */ |
Jonathan Cameron | 4de66bb | 2011-06-27 13:07:12 +0100 | [diff] [blame] | 538 | ret = adis16204_initial_setup(indio_dev); |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 539 | if (ret) |
| 540 | goto error_remove_trigger; |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 541 | ret = iio_device_register(indio_dev); |
| 542 | if (ret) |
| 543 | goto error_remove_trigger; |
| 544 | |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 545 | return 0; |
| 546 | |
| 547 | error_remove_trigger: |
Jonathan Cameron | 4de66bb | 2011-06-27 13:07:12 +0100 | [diff] [blame] | 548 | adis16204_remove_trigger(indio_dev); |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 549 | error_uninitialize_ring: |
Jonathan Cameron | 14555b1 | 2011-09-21 11:15:57 +0100 | [diff] [blame] | 550 | iio_buffer_unregister(indio_dev); |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 551 | error_unreg_ring_funcs: |
Jonathan Cameron | 4de66bb | 2011-06-27 13:07:12 +0100 | [diff] [blame] | 552 | adis16204_unconfigure_ring(indio_dev); |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 553 | error_free_dev: |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 554 | iio_free_device(indio_dev); |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 555 | error_ret: |
| 556 | return ret; |
| 557 | } |
| 558 | |
| 559 | static int adis16204_remove(struct spi_device *spi) |
| 560 | { |
Jonathan Cameron | 4de66bb | 2011-06-27 13:07:12 +0100 | [diff] [blame] | 561 | struct iio_dev *indio_dev = spi_get_drvdata(spi); |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 562 | |
Jonathan Cameron | d2fffd6 | 2011-10-14 14:46:58 +0100 | [diff] [blame] | 563 | iio_device_unregister(indio_dev); |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 564 | adis16204_remove_trigger(indio_dev); |
Jonathan Cameron | 14555b1 | 2011-09-21 11:15:57 +0100 | [diff] [blame] | 565 | iio_buffer_unregister(indio_dev); |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 566 | adis16204_unconfigure_ring(indio_dev); |
Jonathan Cameron | d2fffd6 | 2011-10-14 14:46:58 +0100 | [diff] [blame] | 567 | iio_free_device(indio_dev); |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 568 | |
| 569 | return 0; |
| 570 | } |
| 571 | |
| 572 | static struct spi_driver adis16204_driver = { |
| 573 | .driver = { |
| 574 | .name = "adis16204", |
| 575 | .owner = THIS_MODULE, |
| 576 | }, |
| 577 | .probe = adis16204_probe, |
| 578 | .remove = __devexit_p(adis16204_remove), |
| 579 | }; |
| 580 | |
| 581 | static __init int adis16204_init(void) |
| 582 | { |
| 583 | return spi_register_driver(&adis16204_driver); |
| 584 | } |
| 585 | module_init(adis16204_init); |
| 586 | |
| 587 | static __exit void adis16204_exit(void) |
| 588 | { |
| 589 | spi_unregister_driver(&adis16204_driver); |
| 590 | } |
| 591 | module_exit(adis16204_exit); |
| 592 | |
| 593 | MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>"); |
Jonathan Cameron | ad3eb9a | 2011-05-18 14:41:48 +0100 | [diff] [blame] | 594 | MODULE_DESCRIPTION("ADIS16204 High-g Digital Impact Sensor and Recorder"); |
Barry Song | bb6f19e | 2010-10-27 21:43:51 -0400 | [diff] [blame] | 595 | MODULE_LICENSE("GPL v2"); |