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d9105c2b MV |
1 | /* |
2 | * Core functions for: | |
3 | * Philips UCB1400 multifunction chip | |
4 | * | |
5 | * Based on ucb1400_ts.c: | |
6 | * Author: Nicolas Pitre | |
7 | * Created: September 25, 2006 | |
8 | * Copyright: MontaVista Software, Inc. | |
9 | * | |
10 | * Spliting done by: Marek Vasut <marek.vasut@gmail.com> | |
11 | * If something doesnt work and it worked before spliting, e-mail me, | |
12 | * dont bother Nicolas please ;-) | |
13 | * | |
14 | * This program is free software; you can redistribute it and/or modify | |
15 | * it under the terms of the GNU General Public License version 2 as | |
16 | * published by the Free Software Foundation. | |
17 | * | |
18 | * This code is heavily based on ucb1x00-*.c copyrighted by Russell King | |
19 | * covering the UCB1100, UCB1200 and UCB1300.. Support for the UCB1400 has | |
20 | * been made separate from ucb1x00-core/ucb1x00-ts on Russell's request. | |
21 | */ | |
22 | ||
23 | #include <linux/module.h> | |
a99bbaf5 | 24 | #include <linux/sched.h> |
d9105c2b MV |
25 | #include <linux/ucb1400.h> |
26 | ||
cbf806dd SAS |
27 | unsigned int ucb1400_adc_read(struct snd_ac97 *ac97, u16 adc_channel, |
28 | int adcsync) | |
29 | { | |
30 | unsigned int val; | |
31 | ||
32 | if (adcsync) | |
33 | adc_channel |= UCB_ADC_SYNC_ENA; | |
34 | ||
35 | ucb1400_reg_write(ac97, UCB_ADC_CR, UCB_ADC_ENA | adc_channel); | |
36 | ucb1400_reg_write(ac97, UCB_ADC_CR, UCB_ADC_ENA | adc_channel | | |
37 | UCB_ADC_START); | |
38 | ||
39 | while (!((val = ucb1400_reg_read(ac97, UCB_ADC_DATA)) | |
40 | & UCB_ADC_DAT_VALID)) | |
41 | schedule_timeout_uninterruptible(1); | |
42 | ||
43 | return val & UCB_ADC_DAT_MASK; | |
44 | } | |
45 | EXPORT_SYMBOL_GPL(ucb1400_adc_read); | |
46 | ||
d9105c2b MV |
47 | static int ucb1400_core_probe(struct device *dev) |
48 | { | |
49 | int err; | |
50 | struct ucb1400 *ucb; | |
51 | struct ucb1400_ts ucb_ts; | |
4cf8e53b | 52 | struct ucb1400_gpio ucb_gpio; |
d9105c2b MV |
53 | struct snd_ac97 *ac97; |
54 | ||
55 | memset(&ucb_ts, 0, sizeof(ucb_ts)); | |
4cf8e53b | 56 | memset(&ucb_gpio, 0, sizeof(ucb_gpio)); |
d9105c2b MV |
57 | |
58 | ucb = kzalloc(sizeof(struct ucb1400), GFP_KERNEL); | |
59 | if (!ucb) { | |
60 | err = -ENOMEM; | |
61 | goto err; | |
62 | } | |
63 | ||
64 | dev_set_drvdata(dev, ucb); | |
65 | ||
66 | ac97 = to_ac97_t(dev); | |
67 | ||
68 | ucb_ts.id = ucb1400_reg_read(ac97, UCB_ID); | |
69 | if (ucb_ts.id != UCB_ID_1400) { | |
70 | err = -ENODEV; | |
71 | goto err0; | |
72 | } | |
73 | ||
4cf8e53b MV |
74 | /* GPIO */ |
75 | ucb_gpio.ac97 = ac97; | |
76 | ucb->ucb1400_gpio = platform_device_alloc("ucb1400_gpio", -1); | |
77 | if (!ucb->ucb1400_gpio) { | |
78 | err = -ENOMEM; | |
79 | goto err0; | |
80 | } | |
81 | err = platform_device_add_data(ucb->ucb1400_gpio, &ucb_gpio, | |
82 | sizeof(ucb_gpio)); | |
83 | if (err) | |
84 | goto err1; | |
85 | err = platform_device_add(ucb->ucb1400_gpio); | |
86 | if (err) | |
87 | goto err1; | |
88 | ||
d9105c2b MV |
89 | /* TOUCHSCREEN */ |
90 | ucb_ts.ac97 = ac97; | |
91 | ucb->ucb1400_ts = platform_device_alloc("ucb1400_ts", -1); | |
92 | if (!ucb->ucb1400_ts) { | |
93 | err = -ENOMEM; | |
4cf8e53b | 94 | goto err2; |
d9105c2b MV |
95 | } |
96 | err = platform_device_add_data(ucb->ucb1400_ts, &ucb_ts, | |
97 | sizeof(ucb_ts)); | |
98 | if (err) | |
4cf8e53b | 99 | goto err3; |
d9105c2b MV |
100 | err = platform_device_add(ucb->ucb1400_ts); |
101 | if (err) | |
4cf8e53b | 102 | goto err3; |
d9105c2b MV |
103 | |
104 | return 0; | |
105 | ||
4cf8e53b | 106 | err3: |
d9105c2b | 107 | platform_device_put(ucb->ucb1400_ts); |
4cf8e53b MV |
108 | err2: |
109 | platform_device_unregister(ucb->ucb1400_gpio); | |
110 | err1: | |
111 | platform_device_put(ucb->ucb1400_gpio); | |
d9105c2b MV |
112 | err0: |
113 | kfree(ucb); | |
114 | err: | |
115 | return err; | |
116 | } | |
117 | ||
118 | static int ucb1400_core_remove(struct device *dev) | |
119 | { | |
120 | struct ucb1400 *ucb = dev_get_drvdata(dev); | |
121 | ||
122 | platform_device_unregister(ucb->ucb1400_ts); | |
4cf8e53b MV |
123 | platform_device_unregister(ucb->ucb1400_gpio); |
124 | ||
d9105c2b MV |
125 | kfree(ucb); |
126 | return 0; | |
127 | } | |
128 | ||
129 | static struct device_driver ucb1400_core_driver = { | |
130 | .name = "ucb1400_core", | |
131 | .bus = &ac97_bus_type, | |
132 | .probe = ucb1400_core_probe, | |
133 | .remove = ucb1400_core_remove, | |
134 | }; | |
135 | ||
136 | static int __init ucb1400_core_init(void) | |
137 | { | |
138 | return driver_register(&ucb1400_core_driver); | |
139 | } | |
140 | ||
141 | static void __exit ucb1400_core_exit(void) | |
142 | { | |
143 | driver_unregister(&ucb1400_core_driver); | |
144 | } | |
145 | ||
146 | module_init(ucb1400_core_init); | |
147 | module_exit(ucb1400_core_exit); | |
148 | ||
149 | MODULE_DESCRIPTION("Philips UCB1400 driver"); | |
150 | MODULE_LICENSE("GPL"); |