ALSA: gus: More constifications
[muen/linux.git] / sound / isa / gus / gusclassic.c
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  *  Driver for Gravis UltraSound Classic soundcard
4  *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
5  */
6
7 #include <linux/init.h>
8 #include <linux/err.h>
9 #include <linux/isa.h>
10 #include <linux/delay.h>
11 #include <linux/time.h>
12 #include <linux/module.h>
13 #include <asm/dma.h>
14 #include <sound/core.h>
15 #include <sound/gus.h>
16 #define SNDRV_LEGACY_FIND_FREE_IRQ
17 #define SNDRV_LEGACY_FIND_FREE_DMA
18 #include <sound/initval.h>
19
20 #define CRD_NAME "Gravis UltraSound Classic"
21 #define DEV_NAME "gusclassic"
22
23 MODULE_DESCRIPTION(CRD_NAME);
24 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
25 MODULE_LICENSE("GPL");
26 MODULE_SUPPORTED_DEVICE("{{Gravis,UltraSound Classic}}");
27
28 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-MAX */
29 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
30 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE; /* Enable this card */
31 static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;     /* 0x220,0x230,0x240,0x250,0x260 */
32 static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ;        /* 3,5,9,11,12,15 */
33 static int dma1[SNDRV_CARDS] = SNDRV_DEFAULT_DMA;       /* 1,3,5,6,7 */
34 static int dma2[SNDRV_CARDS] = SNDRV_DEFAULT_DMA;       /* 1,3,5,6,7 */
35 static int joystick_dac[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 29};
36                                 /* 0 to 31, (0.59V-4.52V or 0.389V-2.98V) */
37 static int channels[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 24};
38 static int pcm_channels[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 2};
39
40 module_param_array(index, int, NULL, 0444);
41 MODULE_PARM_DESC(index, "Index value for " CRD_NAME " soundcard.");
42 module_param_array(id, charp, NULL, 0444);
43 MODULE_PARM_DESC(id, "ID string for " CRD_NAME " soundcard.");
44 module_param_array(enable, bool, NULL, 0444);
45 MODULE_PARM_DESC(enable, "Enable " CRD_NAME " soundcard.");
46 module_param_hw_array(port, long, ioport, NULL, 0444);
47 MODULE_PARM_DESC(port, "Port # for " CRD_NAME " driver.");
48 module_param_hw_array(irq, int, irq, NULL, 0444);
49 MODULE_PARM_DESC(irq, "IRQ # for " CRD_NAME " driver.");
50 module_param_hw_array(dma1, int, dma, NULL, 0444);
51 MODULE_PARM_DESC(dma1, "DMA1 # for " CRD_NAME " driver.");
52 module_param_hw_array(dma2, int, dma, NULL, 0444);
53 MODULE_PARM_DESC(dma2, "DMA2 # for " CRD_NAME " driver.");
54 module_param_array(joystick_dac, int, NULL, 0444);
55 MODULE_PARM_DESC(joystick_dac, "Joystick DAC level 0.59V-4.52V or 0.389V-2.98V for " CRD_NAME " driver.");
56 module_param_array(channels, int, NULL, 0444);
57 MODULE_PARM_DESC(channels, "GF1 channels for " CRD_NAME " driver.");
58 module_param_array(pcm_channels, int, NULL, 0444);
59 MODULE_PARM_DESC(pcm_channels, "Reserved PCM channels for " CRD_NAME " driver.");
60
61 static int snd_gusclassic_match(struct device *dev, unsigned int n)
62 {
63         return enable[n];
64 }
65
66 static int snd_gusclassic_create(struct snd_card *card,
67                                  struct device *dev, unsigned int n,
68                                  struct snd_gus_card **rgus)
69 {
70         static const long possible_ports[] = {0x220, 0x230, 0x240, 0x250, 0x260};
71         static const int possible_irqs[] = {5, 11, 12, 9, 7, 15, 3, 4, -1};
72         static const int possible_dmas[] = {5, 6, 7, 1, 3, -1};
73
74         int i, error;
75
76         if (irq[n] == SNDRV_AUTO_IRQ) {
77                 irq[n] = snd_legacy_find_free_irq(possible_irqs);
78                 if (irq[n] < 0) {
79                         dev_err(dev, "unable to find a free IRQ\n");
80                         return -EBUSY;
81                 }
82         }
83         if (dma1[n] == SNDRV_AUTO_DMA) {
84                 dma1[n] = snd_legacy_find_free_dma(possible_dmas);
85                 if (dma1[n] < 0) {
86                         dev_err(dev, "unable to find a free DMA1\n");
87                         return -EBUSY;
88                 }
89         }
90         if (dma2[n] == SNDRV_AUTO_DMA) {
91                 dma2[n] = snd_legacy_find_free_dma(possible_dmas);
92                 if (dma2[n] < 0) {
93                         dev_err(dev, "unable to find a free DMA2\n");
94                         return -EBUSY;
95                 }
96         }
97
98         if (port[n] != SNDRV_AUTO_PORT)
99                 return snd_gus_create(card, port[n], irq[n], dma1[n], dma2[n],
100                                 0, channels[n], pcm_channels[n], 0, rgus);
101
102         i = 0;
103         do {
104                 port[n] = possible_ports[i];
105                 error = snd_gus_create(card, port[n], irq[n], dma1[n], dma2[n],
106                                 0, channels[n], pcm_channels[n], 0, rgus);
107         } while (error < 0 && ++i < ARRAY_SIZE(possible_ports));
108
109         return error;
110 }
111
112 static int snd_gusclassic_detect(struct snd_gus_card *gus)
113 {
114         unsigned char d;
115
116         snd_gf1_i_write8(gus, SNDRV_GF1_GB_RESET, 0);   /* reset GF1 */
117         if (((d = snd_gf1_i_look8(gus, SNDRV_GF1_GB_RESET)) & 0x07) != 0) {
118                 snd_printdd("[0x%lx] check 1 failed - 0x%x\n", gus->gf1.port, d);
119                 return -ENODEV;
120         }
121         udelay(160);
122         snd_gf1_i_write8(gus, SNDRV_GF1_GB_RESET, 1);   /* release reset */
123         udelay(160);
124         if (((d = snd_gf1_i_look8(gus, SNDRV_GF1_GB_RESET)) & 0x07) != 1) {
125                 snd_printdd("[0x%lx] check 2 failed - 0x%x\n", gus->gf1.port, d);
126                 return -ENODEV;
127         }
128         return 0;
129 }
130
131 static int snd_gusclassic_probe(struct device *dev, unsigned int n)
132 {
133         struct snd_card *card;
134         struct snd_gus_card *gus;
135         int error;
136
137         error = snd_card_new(dev, index[n], id[n], THIS_MODULE, 0, &card);
138         if (error < 0)
139                 return error;
140
141         if (pcm_channels[n] < 2)
142                 pcm_channels[n] = 2;
143
144         error = snd_gusclassic_create(card, dev, n, &gus);
145         if (error < 0)
146                 goto out;
147
148         error = snd_gusclassic_detect(gus);
149         if (error < 0)
150                 goto out;
151
152         gus->joystick_dac = joystick_dac[n];
153
154         error = snd_gus_initialize(gus);
155         if (error < 0)
156                 goto out;
157
158         error = -ENODEV;
159         if (gus->max_flag || gus->ess_flag) {
160                 dev_err(dev, "GUS Classic or ACE soundcard was "
161                         "not detected at 0x%lx\n", gus->gf1.port);
162                 goto out;
163         }
164
165         error = snd_gf1_new_mixer(gus);
166         if (error < 0)
167                 goto out;
168
169         error = snd_gf1_pcm_new(gus, 0, 0);
170         if (error < 0)
171                 goto out;
172
173         if (!gus->ace_flag) {
174                 error = snd_gf1_rawmidi_new(gus, 0);
175                 if (error < 0)
176                         goto out;
177         }
178
179         sprintf(card->longname + strlen(card->longname),
180                 " at 0x%lx, irq %d, dma %d",
181                 gus->gf1.port, gus->gf1.irq, gus->gf1.dma1);
182
183         if (gus->gf1.dma2 >= 0)
184                 sprintf(card->longname + strlen(card->longname),
185                         "&%d", gus->gf1.dma2);
186
187         error = snd_card_register(card);
188         if (error < 0)
189                 goto out;
190
191         dev_set_drvdata(dev, card);
192         return 0;
193
194 out:    snd_card_free(card);
195         return error;
196 }
197
198 static int snd_gusclassic_remove(struct device *dev, unsigned int n)
199 {
200         snd_card_free(dev_get_drvdata(dev));
201         return 0;
202 }
203
204 static struct isa_driver snd_gusclassic_driver = {
205         .match          = snd_gusclassic_match,
206         .probe          = snd_gusclassic_probe,
207         .remove         = snd_gusclassic_remove,
208 #if 0   /* FIXME */
209         .suspend        = snd_gusclassic_suspend,
210         .remove         = snd_gusclassic_remove,
211 #endif
212         .driver         = {
213                 .name   = DEV_NAME
214         }
215 };
216
217 module_isa_driver(snd_gusclassic_driver, SNDRV_CARDS);