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11#include <linux/module.h>
12#include <linux/kernel.h>
13#include <linux/init.h>
14#include <linux/err.h>
15#include <linux/input.h>
16#include <linux/interrupt.h>
17#include <linux/workqueue.h>
18#include <linux/spi/spi.h>
19#include <linux/pm.h>
20
21#include "lis3lv02d.h"
22
23#define DRV_NAME "lis3lv02d_spi"
24#define LIS3_SPI_READ 0x80
25
26static int lis3_spi_read(struct lis3lv02d *lis3, int reg, u8 *v)
27{
28 struct spi_device *spi = lis3->bus_priv;
29 int ret = spi_w8r8(spi, reg | LIS3_SPI_READ);
30 if (ret < 0)
31 return -EINVAL;
32
33 *v = (u8) ret;
34 return 0;
35}
36
37static int lis3_spi_write(struct lis3lv02d *lis3, int reg, u8 val)
38{
39 u8 tmp[2] = { reg, val };
40 struct spi_device *spi = lis3->bus_priv;
41 return spi_write(spi, tmp, sizeof(tmp));
42}
43
44static int lis3_spi_init(struct lis3lv02d *lis3)
45{
46 u8 reg;
47 int ret;
48
49
50 ret = lis3->read(lis3, CTRL_REG1, ®);
51 if (ret < 0)
52 return ret;
53
54 reg |= CTRL1_PD0 | CTRL1_Xen | CTRL1_Yen | CTRL1_Zen;
55 return lis3->write(lis3, CTRL_REG1, reg);
56}
57
58static union axis_conversion lis3lv02d_axis_normal =
59 { .as_array = { 1, 2, 3 } };
60
61static int __devinit lis302dl_spi_probe(struct spi_device *spi)
62{
63 int ret;
64
65 spi->bits_per_word = 8;
66 spi->mode = SPI_MODE_0;
67 ret = spi_setup(spi);
68 if (ret < 0)
69 return ret;
70
71 lis3_dev.bus_priv = spi;
72 lis3_dev.init = lis3_spi_init;
73 lis3_dev.read = lis3_spi_read;
74 lis3_dev.write = lis3_spi_write;
75 lis3_dev.irq = spi->irq;
76 lis3_dev.ac = lis3lv02d_axis_normal;
77 lis3_dev.pdata = spi->dev.platform_data;
78 spi_set_drvdata(spi, &lis3_dev);
79
80 return lis3lv02d_init_device(&lis3_dev);
81}
82
83static int __devexit lis302dl_spi_remove(struct spi_device *spi)
84{
85 struct lis3lv02d *lis3 = spi_get_drvdata(spi);
86 lis3lv02d_joystick_disable(lis3);
87 lis3lv02d_poweroff(lis3);
88
89 return lis3lv02d_remove_fs(&lis3_dev);
90}
91
92#ifdef CONFIG_PM_SLEEP
93static int lis3lv02d_spi_suspend(struct device *dev)
94{
95 struct spi_device *spi = to_spi_device(dev);
96 struct lis3lv02d *lis3 = spi_get_drvdata(spi);
97
98 if (!lis3->pdata || !lis3->pdata->wakeup_flags)
99 lis3lv02d_poweroff(&lis3_dev);
100
101 return 0;
102}
103
104static int lis3lv02d_spi_resume(struct device *dev)
105{
106 struct spi_device *spi = to_spi_device(dev);
107 struct lis3lv02d *lis3 = spi_get_drvdata(spi);
108
109 if (!lis3->pdata || !lis3->pdata->wakeup_flags)
110 lis3lv02d_poweron(lis3);
111
112 return 0;
113}
114#endif
115
116static SIMPLE_DEV_PM_OPS(lis3lv02d_spi_pm, lis3lv02d_spi_suspend,
117 lis3lv02d_spi_resume);
118
119static struct spi_driver lis302dl_spi_driver = {
120 .driver = {
121 .name = DRV_NAME,
122 .owner = THIS_MODULE,
123 .pm = &lis3lv02d_spi_pm,
124 },
125 .probe = lis302dl_spi_probe,
126 .remove = __devexit_p(lis302dl_spi_remove),
127};
128
129static int __init lis302dl_init(void)
130{
131 return spi_register_driver(&lis302dl_spi_driver);
132}
133
134static void __exit lis302dl_exit(void)
135{
136 spi_unregister_driver(&lis302dl_spi_driver);
137}
138
139module_init(lis302dl_init);
140module_exit(lis302dl_exit);
141
142MODULE_AUTHOR("Daniel Mack <daniel@caiaq.de>");
143MODULE_DESCRIPTION("lis3lv02d SPI glue layer");
144MODULE_LICENSE("GPL");
145MODULE_ALIAS("spi:" DRV_NAME);
146
