[ALSA] unregister platform devices
[linux-2.6.git] / sound / isa / ad1848 / ad1848.c
1 /*
2  *  Generic driver for AD1848/AD1847/CS4248 chips (0.1 Alpha)
3  *  Copyright (c) by Tugrul Galatali <galatalt@stuy.edu>,
4  *                   Jaroslav Kysela <perex@suse.cz>
5  *  Based on card-4232.c by Jaroslav Kysela <perex@suse.cz>
6  *
7  *
8  *   This program is free software; you can redistribute it and/or modify
9  *   it under the terms of the GNU General Public License as published by
10  *   the Free Software Foundation; either version 2 of the License, or
11  *   (at your option) any later version.
12  *
13  *   This program is distributed in the hope that it will be useful,
14  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
15  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16  *   GNU General Public License for more details.
17  *
18  *   You should have received a copy of the GNU General Public License
19  *   along with this program; if not, write to the Free Software
20  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
21  *
22  */
23
24 #include <sound/driver.h>
25 #include <linux/init.h>
26 #include <linux/err.h>
27 #include <linux/platform_device.h>
28 #include <linux/time.h>
29 #include <linux/wait.h>
30 #include <linux/moduleparam.h>
31 #include <sound/core.h>
32 #include <sound/ad1848.h>
33 #include <sound/initval.h>
34
35 MODULE_AUTHOR("Tugrul Galatali <galatalt@stuy.edu>, Jaroslav Kysela <perex@suse.cz>");
36 MODULE_DESCRIPTION("AD1848/AD1847/CS4248");
37 MODULE_LICENSE("GPL");
38 MODULE_SUPPORTED_DEVICE("{{Analog Devices,AD1848},"
39                 "{Analog Devices,AD1847},"
40                 "{Crystal Semiconductors,CS4248}}");
41
42 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-MAX */
43 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
44 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE;  /* Enable this card */
45 static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;     /* PnP setup */
46 static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ;        /* 5,7,9,11,12,15 */
47 static int dma1[SNDRV_CARDS] = SNDRV_DEFAULT_DMA;       /* 0,1,3,5,6,7 */
48 static int thinkpad[SNDRV_CARDS];                       /* Thinkpad special case */
49
50 module_param_array(index, int, NULL, 0444);
51 MODULE_PARM_DESC(index, "Index value for AD1848 soundcard.");
52 module_param_array(id, charp, NULL, 0444);
53 MODULE_PARM_DESC(id, "ID string for AD1848 soundcard.");
54 module_param_array(enable, bool, NULL, 0444);
55 MODULE_PARM_DESC(enable, "Enable AD1848 soundcard.");
56 module_param_array(port, long, NULL, 0444);
57 MODULE_PARM_DESC(port, "Port # for AD1848 driver.");
58 module_param_array(irq, int, NULL, 0444);
59 MODULE_PARM_DESC(irq, "IRQ # for AD1848 driver.");
60 module_param_array(dma1, int, NULL, 0444);
61 MODULE_PARM_DESC(dma1, "DMA1 # for AD1848 driver.");
62 module_param_array(thinkpad, bool, NULL, 0444);
63 MODULE_PARM_DESC(thinkpad, "Enable only for the onboard CS4248 of IBM Thinkpad 360/750/755 series.");
64
65 static struct platform_device *devices[SNDRV_CARDS];
66
67
68 static int __init snd_ad1848_probe(struct platform_device *pdev)
69 {
70         int dev = pdev->id;
71         struct snd_card *card;
72         struct snd_ad1848 *chip;
73         struct snd_pcm *pcm;
74         int err;
75
76         if (port[dev] == SNDRV_AUTO_PORT) {
77                 snd_printk(KERN_ERR "ad1848: specify port\n");
78                 return -EINVAL;
79         }
80         if (irq[dev] == SNDRV_AUTO_IRQ) {
81                 snd_printk(KERN_ERR "ad1848: specify irq\n");
82                 return -EINVAL;
83         }
84         if (dma1[dev] == SNDRV_AUTO_DMA) {
85                 snd_printk(KERN_ERR "ad1848: specify dma1\n");
86                 return -EINVAL;
87         }
88
89         card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
90         if (card == NULL)
91                 return -ENOMEM;
92
93         if ((err = snd_ad1848_create(card, port[dev],
94                                      irq[dev],
95                                      dma1[dev],
96                                      thinkpad[dev] ? AD1848_HW_THINKPAD : AD1848_HW_DETECT,
97                                      &chip)) < 0)
98                 goto _err;
99         card->private_data = chip;
100
101         if ((err = snd_ad1848_pcm(chip, 0, &pcm)) < 0)
102                 goto _err;
103
104         if ((err = snd_ad1848_mixer(chip)) < 0)
105                 goto _err;
106
107         strcpy(card->driver, "AD1848");
108         strcpy(card->shortname, pcm->name);
109
110         sprintf(card->longname, "%s at 0x%lx, irq %d, dma %d",
111                 pcm->name, chip->port, irq[dev], dma1[dev]);
112
113         if (thinkpad[dev])
114                 strcat(card->longname, " [Thinkpad]");
115
116         snd_card_set_dev(card, &pdev->dev);
117
118         if ((err = snd_card_register(card)) < 0)
119                 goto _err;
120
121         platform_set_drvdata(pdev, card);
122         return 0;
123
124  _err:
125         snd_card_free(card);
126         return err;
127 }
128
129 static int __devexit snd_ad1848_remove(struct platform_device *devptr)
130 {
131         snd_card_free(platform_get_drvdata(devptr));
132         platform_set_drvdata(devptr, NULL);
133         return 0;
134 }
135
136 #ifdef CONFIG_PM
137 static int snd_ad1848_suspend(struct platform_device *pdev, pm_message_t state)
138 {
139         struct snd_card *card = platform_get_drvdata(pdev);
140         struct snd_ad1848 *chip = card->private_data;
141
142         snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
143         chip->suspend(chip);
144         return 0;
145 }
146
147 static int snd_ad1848_resume(struct platform_device *pdev)
148 {
149         struct snd_card *card = platform_get_drvdata(pdev);
150         struct snd_ad1848 *chip = card->private_data;
151
152         chip->resume(chip);
153         snd_power_change_state(card, SNDRV_CTL_POWER_D0);
154         return 0;
155 }
156 #endif
157
158 #define SND_AD1848_DRIVER       "snd_ad1848"
159
160 static struct platform_driver snd_ad1848_driver = {
161         .probe          = snd_ad1848_probe,
162         .remove         = __devexit_p(snd_ad1848_remove),
163 #ifdef CONFIG_PM
164         .suspend        = snd_ad1848_suspend,
165         .resume         = snd_ad1848_resume,
166 #endif
167         .driver         = {
168                 .name   = SND_AD1848_DRIVER
169         },
170 };
171
172 static void __init_or_module snd_ad1848_unregister_all(void)
173 {
174         int i;
175
176         for (i = 0; i < ARRAY_SIZE(devices); ++i)
177                 platform_device_unregister(devices[i]);
178         platform_driver_unregister(&snd_ad1848_driver);
179 }
180
181 static int __init alsa_card_ad1848_init(void)
182 {
183         int i, cards, err;
184
185         err = platform_driver_register(&snd_ad1848_driver);
186         if (err < 0)
187                 return err;
188
189         cards = 0;
190         for (i = 0; i < SNDRV_CARDS && enable[i]; i++) {
191                 struct platform_device *device;
192                 device = platform_device_register_simple(SND_AD1848_DRIVER,
193                                                          i, NULL, 0);
194                 if (IS_ERR(device)) {
195                         err = PTR_ERR(device);
196                         goto errout;
197                 }
198                 devices[i] = device;
199                 cards++;
200         }
201         if (!cards) {
202 #ifdef MODULE
203                 printk(KERN_ERR "AD1848 soundcard not found or device busy\n");
204 #endif
205                 err = -ENODEV;
206                 goto errout;
207         }
208         return 0;
209
210  errout:
211         snd_ad1848_unregister_all();
212         return err;
213 }
214
215 static void __exit alsa_card_ad1848_exit(void)
216 {
217         snd_ad1848_unregister_all();
218 }
219
220 module_init(alsa_card_ad1848_init)
221 module_exit(alsa_card_ad1848_exit)