1#include <linux/interrupt.h>
2#include <linux/irq.h>
3#include <linux/gpio.h>
4#include <linux/workqueue.h>
5#include <linux/mutex.h>
6#include <linux/device.h>
7#include <linux/kernel.h>
8#include <linux/spi/spi.h>
9#include <linux/slab.h>
10#include <linux/sysfs.h>
11#include <linux/list.h>
12
13#include "../iio.h"
14#include "../sysfs.h"
15#include "../ring_sw.h"
16#include "accel.h"
17#include "../trigger.h"
18#include "adis16203.h"
19
20static IIO_SCAN_EL_C(in_supply, ADIS16203_SCAN_SUPPLY, ADIS16203_SUPPLY_OUT, NULL);
21static IIO_CONST_ATTR_SCAN_EL_TYPE(in_supply, u, 12, 16);
22static IIO_SCAN_EL_C(in0, ADIS16203_SCAN_AUX_ADC, ADIS16203_AUX_ADC, NULL);
23static IIO_CONST_ATTR_SCAN_EL_TYPE(in0, u, 12, 16);
24static IIO_SCAN_EL_C(temp, ADIS16203_SCAN_TEMP, ADIS16203_TEMP_OUT, NULL);
25static IIO_CONST_ATTR_SCAN_EL_TYPE(temp, u, 12, 16);
26static IIO_SCAN_EL_C(incli_x, ADIS16203_SCAN_INCLI_X,
27 ADIS16203_XINCL_OUT, NULL);
28static IIO_SCAN_EL_C(incli_y, ADIS16203_SCAN_INCLI_Y,
29 ADIS16203_YINCL_OUT, NULL);
30static IIO_CONST_ATTR_SCAN_EL_TYPE(incli, s, 14, 16);
31static IIO_SCAN_EL_TIMESTAMP(5);
32static IIO_CONST_ATTR_SCAN_EL_TYPE(timestamp, s, 64, 64);
33
34static struct attribute *adis16203_scan_el_attrs[] = {
35 &iio_scan_el_in_supply.dev_attr.attr,
36 &iio_const_attr_in_supply_index.dev_attr.attr,
37 &iio_const_attr_in_supply_type.dev_attr.attr,
38 &iio_scan_el_in0.dev_attr.attr,
39 &iio_const_attr_in0_index.dev_attr.attr,
40 &iio_const_attr_in0_type.dev_attr.attr,
41 &iio_scan_el_temp.dev_attr.attr,
42 &iio_const_attr_temp_index.dev_attr.attr,
43 &iio_const_attr_temp_type.dev_attr.attr,
44 &iio_scan_el_incli_x.dev_attr.attr,
45 &iio_const_attr_incli_x_index.dev_attr.attr,
46 &iio_scan_el_incli_y.dev_attr.attr,
47 &iio_const_attr_incli_y_index.dev_attr.attr,
48 &iio_const_attr_incli_type.dev_attr.attr,
49 &iio_scan_el_timestamp.dev_attr.attr,
50 &iio_const_attr_timestamp_index.dev_attr.attr,
51 &iio_const_attr_timestamp_type.dev_attr.attr,
52 NULL,
53};
54
55static struct attribute_group adis16203_scan_el_group = {
56 .attrs = adis16203_scan_el_attrs,
57 .name = "scan_elements",
58};
59
60
61
62
63
64static void adis16203_poll_func_th(struct iio_dev *indio_dev, s64 timestamp)
65{
66 struct adis16203_state *st = iio_dev_get_devdata(indio_dev);
67 st->last_timestamp = timestamp;
68 schedule_work(&st->work_trigger_to_ring);
69}
70
71
72
73
74
75
76static int adis16203_read_ring_data(struct device *dev, u8 *rx)
77{
78 struct spi_message msg;
79 struct iio_dev *indio_dev = dev_get_drvdata(dev);
80 struct adis16203_state *st = iio_dev_get_devdata(indio_dev);
81 struct spi_transfer xfers[ADIS16203_OUTPUTS + 1];
82 int ret;
83 int i;
84
85 mutex_lock(&st->buf_lock);
86
87 spi_message_init(&msg);
88
89 memset(xfers, 0, sizeof(xfers));
90 for (i = 0; i <= ADIS16203_OUTPUTS; i++) {
91 xfers[i].bits_per_word = 8;
92 xfers[i].cs_change = 1;
93 xfers[i].len = 2;
94 xfers[i].delay_usecs = 20;
95 xfers[i].tx_buf = st->tx + 2 * i;
96 if (i < 1)
97 st->tx[2 * i] = ADIS16203_READ_REG(ADIS16203_SUPPLY_OUT + 2 * i);
98 else
99 st->tx[2 * i] = ADIS16203_READ_REG(ADIS16203_SUPPLY_OUT + 2 * i + 6);
100 st->tx[2 * i + 1] = 0;
101 if (i >= 1)
102 xfers[i].rx_buf = rx + 2 * (i - 1);
103 spi_message_add_tail(&xfers[i], &msg);
104 }
105
106 ret = spi_sync(st->us, &msg);
107 if (ret)
108 dev_err(&st->us->dev, "problem when burst reading");
109
110 mutex_unlock(&st->buf_lock);
111
112 return ret;
113}
114
115
116
117
118static void adis16203_trigger_bh_to_ring(struct work_struct *work_s)
119{
120 struct adis16203_state *st
121 = container_of(work_s, struct adis16203_state,
122 work_trigger_to_ring);
123 struct iio_ring_buffer *ring = st->indio_dev->ring;
124
125 int i = 0;
126 s16 *data;
127 size_t datasize = ring->access.get_bytes_per_datum(ring);
128
129 data = kmalloc(datasize, GFP_KERNEL);
130 if (data == NULL) {
131 dev_err(&st->us->dev, "memory alloc failed in ring bh");
132 return;
133 }
134
135 if (ring->scan_count)
136 if (adis16203_read_ring_data(&st->indio_dev->dev, st->rx) >= 0)
137 for (; i < ring->scan_count; i++)
138 data[i] = be16_to_cpup(
139 (__be16 *)&(st->rx[i*2]));
140
141
142 if (ring->scan_timestamp)
143 *((s64 *)(data + ((i + 3)/4)*4)) = st->last_timestamp;
144
145 ring->access.store_to(ring,
146 (u8 *)data,
147 st->last_timestamp);
148
149 iio_trigger_notify_done(st->indio_dev->trig);
150 kfree(data);
151
152 return;
153}
154
155void adis16203_unconfigure_ring(struct iio_dev *indio_dev)
156{
157 kfree(indio_dev->pollfunc);
158 iio_sw_rb_free(indio_dev->ring);
159}
160
161int adis16203_configure_ring(struct iio_dev *indio_dev)
162{
163 int ret = 0;
164 struct adis16203_state *st = indio_dev->dev_data;
165 struct iio_ring_buffer *ring;
166 INIT_WORK(&st->work_trigger_to_ring, adis16203_trigger_bh_to_ring);
167
168 ring = iio_sw_rb_allocate(indio_dev);
169 if (!ring) {
170 ret = -ENOMEM;
171 return ret;
172 }
173 indio_dev->ring = ring;
174
175 iio_ring_sw_register_funcs(&ring->access);
176 ring->bpe = 2;
177 ring->scan_el_attrs = &adis16203_scan_el_group;
178 ring->scan_timestamp = true;
179 ring->preenable = &iio_sw_ring_preenable;
180 ring->postenable = &iio_triggered_ring_postenable;
181 ring->predisable = &iio_triggered_ring_predisable;
182 ring->owner = THIS_MODULE;
183
184
185 iio_scan_mask_set(ring, iio_scan_el_in_supply.number);
186 iio_scan_mask_set(ring, iio_scan_el_temp.number);
187 iio_scan_mask_set(ring, iio_scan_el_in0.number);
188 iio_scan_mask_set(ring, iio_scan_el_incli_x.number);
189 iio_scan_mask_set(ring, iio_scan_el_incli_y.number);
190
191 ret = iio_alloc_pollfunc(indio_dev, NULL, &adis16203_poll_func_th);
192 if (ret)
193 goto error_iio_sw_rb_free;
194
195 indio_dev->modes |= INDIO_RING_TRIGGERED;
196 return 0;
197
198error_iio_sw_rb_free:
199 iio_sw_rb_free(indio_dev->ring);
200 return ret;
201}
202
203int adis16203_initialize_ring(struct iio_ring_buffer *ring)
204{
205 return iio_ring_buffer_register(ring, 0);
206}
207
208void adis16203_uninitialize_ring(struct iio_ring_buffer *ring)
209{
210 iio_ring_buffer_unregister(ring);
211}
212
