Commit | Line | Data |
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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> | |
25985edc | 11 | * If something doesn't work and it worked before spliting, e-mail me, |
d9105c2b MV |
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> |
5a0e3ad6 | 25 | #include <linux/slab.h> |
d9105c2b MV |
26 | #include <linux/ucb1400.h> |
27 | ||
cbf806dd SAS |
28 | unsigned int ucb1400_adc_read(struct snd_ac97 *ac97, u16 adc_channel, |
29 | int adcsync) | |
30 | { | |
31 | unsigned int val; | |
32 | ||
33 | if (adcsync) | |
34 | adc_channel |= UCB_ADC_SYNC_ENA; | |
35 | ||
36 | ucb1400_reg_write(ac97, UCB_ADC_CR, UCB_ADC_ENA | adc_channel); | |
37 | ucb1400_reg_write(ac97, UCB_ADC_CR, UCB_ADC_ENA | adc_channel | | |
38 | UCB_ADC_START); | |
39 | ||
40 | while (!((val = ucb1400_reg_read(ac97, UCB_ADC_DATA)) | |
41 | & UCB_ADC_DAT_VALID)) | |
42 | schedule_timeout_uninterruptible(1); | |
43 | ||
44 | return val & UCB_ADC_DAT_MASK; | |
45 | } | |
46 | EXPORT_SYMBOL_GPL(ucb1400_adc_read); | |
47 | ||
d9105c2b MV |
48 | static int ucb1400_core_probe(struct device *dev) |
49 | { | |
50 | int err; | |
51 | struct ucb1400 *ucb; | |
52 | struct ucb1400_ts ucb_ts; | |
4cf8e53b | 53 | struct ucb1400_gpio ucb_gpio; |
d9105c2b | 54 | struct snd_ac97 *ac97; |
fb141597 | 55 | struct ucb1400_pdata *pdata = dev->platform_data; |
d9105c2b MV |
56 | |
57 | memset(&ucb_ts, 0, sizeof(ucb_ts)); | |
4cf8e53b | 58 | memset(&ucb_gpio, 0, sizeof(ucb_gpio)); |
d9105c2b MV |
59 | |
60 | ucb = kzalloc(sizeof(struct ucb1400), GFP_KERNEL); | |
61 | if (!ucb) { | |
62 | err = -ENOMEM; | |
63 | goto err; | |
64 | } | |
65 | ||
66 | dev_set_drvdata(dev, ucb); | |
67 | ||
68 | ac97 = to_ac97_t(dev); | |
69 | ||
70 | ucb_ts.id = ucb1400_reg_read(ac97, UCB_ID); | |
71 | if (ucb_ts.id != UCB_ID_1400) { | |
72 | err = -ENODEV; | |
73 | goto err0; | |
74 | } | |
75 | ||
4cf8e53b MV |
76 | /* GPIO */ |
77 | ucb_gpio.ac97 = ac97; | |
78 | ucb->ucb1400_gpio = platform_device_alloc("ucb1400_gpio", -1); | |
79 | if (!ucb->ucb1400_gpio) { | |
80 | err = -ENOMEM; | |
81 | goto err0; | |
82 | } | |
83 | err = platform_device_add_data(ucb->ucb1400_gpio, &ucb_gpio, | |
84 | sizeof(ucb_gpio)); | |
85 | if (err) | |
86 | goto err1; | |
87 | err = platform_device_add(ucb->ucb1400_gpio); | |
88 | if (err) | |
89 | goto err1; | |
90 | ||
d9105c2b MV |
91 | /* TOUCHSCREEN */ |
92 | ucb_ts.ac97 = ac97; | |
fb141597 MV |
93 | |
94 | if (pdata != NULL && pdata->irq >= 0) | |
95 | ucb_ts.irq = pdata->irq; | |
96 | else | |
97 | ucb_ts.irq = -1; | |
98 | ||
d9105c2b MV |
99 | ucb->ucb1400_ts = platform_device_alloc("ucb1400_ts", -1); |
100 | if (!ucb->ucb1400_ts) { | |
101 | err = -ENOMEM; | |
4cf8e53b | 102 | goto err2; |
d9105c2b MV |
103 | } |
104 | err = platform_device_add_data(ucb->ucb1400_ts, &ucb_ts, | |
105 | sizeof(ucb_ts)); | |
106 | if (err) | |
4cf8e53b | 107 | goto err3; |
d9105c2b MV |
108 | err = platform_device_add(ucb->ucb1400_ts); |
109 | if (err) | |
4cf8e53b | 110 | goto err3; |
d9105c2b MV |
111 | |
112 | return 0; | |
113 | ||
4cf8e53b | 114 | err3: |
d9105c2b | 115 | platform_device_put(ucb->ucb1400_ts); |
4cf8e53b | 116 | err2: |
ef256176 | 117 | platform_device_del(ucb->ucb1400_gpio); |
4cf8e53b MV |
118 | err1: |
119 | platform_device_put(ucb->ucb1400_gpio); | |
d9105c2b MV |
120 | err0: |
121 | kfree(ucb); | |
122 | err: | |
123 | return err; | |
124 | } | |
125 | ||
126 | static int ucb1400_core_remove(struct device *dev) | |
127 | { | |
128 | struct ucb1400 *ucb = dev_get_drvdata(dev); | |
129 | ||
130 | platform_device_unregister(ucb->ucb1400_ts); | |
4cf8e53b MV |
131 | platform_device_unregister(ucb->ucb1400_gpio); |
132 | ||
d9105c2b MV |
133 | kfree(ucb); |
134 | return 0; | |
135 | } | |
136 | ||
137 | static struct device_driver ucb1400_core_driver = { | |
138 | .name = "ucb1400_core", | |
139 | .bus = &ac97_bus_type, | |
140 | .probe = ucb1400_core_probe, | |
141 | .remove = ucb1400_core_remove, | |
142 | }; | |
143 | ||
144 | static int __init ucb1400_core_init(void) | |
145 | { | |
146 | return driver_register(&ucb1400_core_driver); | |
147 | } | |
148 | ||
149 | static void __exit ucb1400_core_exit(void) | |
150 | { | |
151 | driver_unregister(&ucb1400_core_driver); | |
152 | } | |
153 | ||
154 | module_init(ucb1400_core_init); | |
155 | module_exit(ucb1400_core_exit); | |
156 | ||
157 | MODULE_DESCRIPTION("Philips UCB1400 driver"); | |
158 | MODULE_LICENSE("GPL"); |