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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 | 53 | struct snd_ac97 *ac97; |
fb141597 | 54 | struct ucb1400_pdata *pdata = dev->platform_data; |
d9105c2b MV |
55 | |
56 | memset(&ucb_ts, 0, sizeof(ucb_ts)); | |
4cf8e53b | 57 | memset(&ucb_gpio, 0, sizeof(ucb_gpio)); |
d9105c2b MV |
58 | |
59 | ucb = kzalloc(sizeof(struct ucb1400), GFP_KERNEL); | |
60 | if (!ucb) { | |
61 | err = -ENOMEM; | |
62 | goto err; | |
63 | } | |
64 | ||
65 | dev_set_drvdata(dev, ucb); | |
66 | ||
67 | ac97 = to_ac97_t(dev); | |
68 | ||
69 | ucb_ts.id = ucb1400_reg_read(ac97, UCB_ID); | |
70 | if (ucb_ts.id != UCB_ID_1400) { | |
71 | err = -ENODEV; | |
72 | goto err0; | |
73 | } | |
74 | ||
4cf8e53b MV |
75 | /* GPIO */ |
76 | ucb_gpio.ac97 = ac97; | |
77 | ucb->ucb1400_gpio = platform_device_alloc("ucb1400_gpio", -1); | |
78 | if (!ucb->ucb1400_gpio) { | |
79 | err = -ENOMEM; | |
80 | goto err0; | |
81 | } | |
82 | err = platform_device_add_data(ucb->ucb1400_gpio, &ucb_gpio, | |
83 | sizeof(ucb_gpio)); | |
84 | if (err) | |
85 | goto err1; | |
86 | err = platform_device_add(ucb->ucb1400_gpio); | |
87 | if (err) | |
88 | goto err1; | |
89 | ||
d9105c2b MV |
90 | /* TOUCHSCREEN */ |
91 | ucb_ts.ac97 = ac97; | |
fb141597 MV |
92 | |
93 | if (pdata != NULL && pdata->irq >= 0) | |
94 | ucb_ts.irq = pdata->irq; | |
95 | else | |
96 | ucb_ts.irq = -1; | |
97 | ||
d9105c2b MV |
98 | ucb->ucb1400_ts = platform_device_alloc("ucb1400_ts", -1); |
99 | if (!ucb->ucb1400_ts) { | |
100 | err = -ENOMEM; | |
4cf8e53b | 101 | goto err2; |
d9105c2b MV |
102 | } |
103 | err = platform_device_add_data(ucb->ucb1400_ts, &ucb_ts, | |
104 | sizeof(ucb_ts)); | |
105 | if (err) | |
4cf8e53b | 106 | goto err3; |
d9105c2b MV |
107 | err = platform_device_add(ucb->ucb1400_ts); |
108 | if (err) | |
4cf8e53b | 109 | goto err3; |
d9105c2b MV |
110 | |
111 | return 0; | |
112 | ||
4cf8e53b | 113 | err3: |
d9105c2b | 114 | platform_device_put(ucb->ucb1400_ts); |
4cf8e53b MV |
115 | err2: |
116 | platform_device_unregister(ucb->ucb1400_gpio); | |
117 | err1: | |
118 | platform_device_put(ucb->ucb1400_gpio); | |
d9105c2b MV |
119 | err0: |
120 | kfree(ucb); | |
121 | err: | |
122 | return err; | |
123 | } | |
124 | ||
125 | static int ucb1400_core_remove(struct device *dev) | |
126 | { | |
127 | struct ucb1400 *ucb = dev_get_drvdata(dev); | |
128 | ||
129 | platform_device_unregister(ucb->ucb1400_ts); | |
4cf8e53b MV |
130 | platform_device_unregister(ucb->ucb1400_gpio); |
131 | ||
d9105c2b MV |
132 | kfree(ucb); |
133 | return 0; | |
134 | } | |
135 | ||
136 | static struct device_driver ucb1400_core_driver = { | |
137 | .name = "ucb1400_core", | |
138 | .bus = &ac97_bus_type, | |
139 | .probe = ucb1400_core_probe, | |
140 | .remove = ucb1400_core_remove, | |
141 | }; | |
142 | ||
143 | static int __init ucb1400_core_init(void) | |
144 | { | |
145 | return driver_register(&ucb1400_core_driver); | |
146 | } | |
147 | ||
148 | static void __exit ucb1400_core_exit(void) | |
149 | { | |
150 | driver_unregister(&ucb1400_core_driver); | |
151 | } | |
152 | ||
153 | module_init(ucb1400_core_init); | |
154 | module_exit(ucb1400_core_exit); | |
155 | ||
156 | MODULE_DESCRIPTION("Philips UCB1400 driver"); | |
157 | MODULE_LICENSE("GPL"); |