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bb233fdf DM |
1 | /* |
2 | * lis3lv02d_spi - SPI glue layer for lis3lv02d | |
3 | * | |
4 | * Copyright (c) 2009 Daniel Mack <daniel@caiaq.de> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * publishhed by the Free Software Foundation. | |
9 | */ | |
10 | ||
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 | ||
20 | #include "lis3lv02d.h" | |
21 | ||
22 | #define DRV_NAME "lis3lv02d_spi" | |
23 | #define LIS3_SPI_READ 0x80 | |
24 | ||
25 | static int lis3_spi_read(struct lis3lv02d *lis3, int reg, u8 *v) | |
26 | { | |
27 | struct spi_device *spi = lis3->bus_priv; | |
28 | int ret = spi_w8r8(spi, reg | LIS3_SPI_READ); | |
29 | if (ret < 0) | |
30 | return -EINVAL; | |
31 | ||
32 | *v = (u8) ret; | |
33 | return 0; | |
34 | } | |
35 | ||
36 | static int lis3_spi_write(struct lis3lv02d *lis3, int reg, u8 val) | |
37 | { | |
38 | u8 tmp[2] = { reg, val }; | |
39 | struct spi_device *spi = lis3->bus_priv; | |
40 | return spi_write(spi, tmp, sizeof(tmp)); | |
41 | } | |
42 | ||
43 | static int lis3_spi_init(struct lis3lv02d *lis3) | |
44 | { | |
45 | u8 reg; | |
46 | int ret; | |
47 | ||
48 | /* power up the device */ | |
49 | ret = lis3->read(lis3, CTRL_REG1, ®); | |
50 | if (ret < 0) | |
51 | return ret; | |
52 | ||
53 | reg |= CTRL1_PD0; | |
54 | return lis3->write(lis3, CTRL_REG1, reg); | |
55 | } | |
56 | ||
57 | static struct axis_conversion lis3lv02d_axis_normal = { 1, 2, 3 }; | |
58 | ||
59 | static int __devinit lis302dl_spi_probe(struct spi_device *spi) | |
60 | { | |
61 | int ret; | |
62 | ||
63 | spi->bits_per_word = 8; | |
64 | spi->mode = SPI_MODE_0; | |
65 | ret = spi_setup(spi); | |
66 | if (ret < 0) | |
67 | return ret; | |
68 | ||
69 | lis3_dev.bus_priv = spi; | |
70 | lis3_dev.init = lis3_spi_init; | |
71 | lis3_dev.read = lis3_spi_read; | |
72 | lis3_dev.write = lis3_spi_write; | |
73 | lis3_dev.irq = spi->irq; | |
74 | lis3_dev.ac = lis3lv02d_axis_normal; | |
8f3128e7 | 75 | lis3_dev.pdata = spi->dev.platform_data; |
bb233fdf DM |
76 | spi_set_drvdata(spi, &lis3_dev); |
77 | ||
78 | ret = lis3lv02d_init_device(&lis3_dev); | |
79 | return ret; | |
80 | } | |
81 | ||
82 | static int __devexit lis302dl_spi_remove(struct spi_device *spi) | |
83 | { | |
84 | struct lis3lv02d *lis3 = spi_get_drvdata(spi); | |
85 | lis3lv02d_joystick_disable(); | |
86 | lis3lv02d_poweroff(lis3); | |
87 | return 0; | |
88 | } | |
89 | ||
90 | static struct spi_driver lis302dl_spi_driver = { | |
91 | .driver = { | |
92 | .name = DRV_NAME, | |
93 | .owner = THIS_MODULE, | |
94 | }, | |
95 | .probe = lis302dl_spi_probe, | |
96 | .remove = __devexit_p(lis302dl_spi_remove), | |
97 | }; | |
98 | ||
99 | static int __init lis302dl_init(void) | |
100 | { | |
101 | return spi_register_driver(&lis302dl_spi_driver); | |
102 | } | |
103 | ||
104 | static void __exit lis302dl_exit(void) | |
105 | { | |
106 | spi_unregister_driver(&lis302dl_spi_driver); | |
107 | } | |
108 | ||
109 | module_init(lis302dl_init); | |
110 | module_exit(lis302dl_exit); | |
111 | ||
112 | MODULE_AUTHOR("Daniel Mack <daniel@caiaq.de>"); | |
113 | MODULE_DESCRIPTION("lis3lv02d SPI glue layer"); | |
114 | MODULE_LICENSE("GPL"); | |
115 |