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8#include <linux/init.h>
9#include <linux/pnp.h>
10#include <linux/err.h>
11#include <linux/platform_device.h>
12#include <linux/module.h>
13#include <sound/core.h>
14#include <sound/mpu401.h>
15#include <sound/initval.h>
16
17MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
18MODULE_DESCRIPTION("MPU-401 UART");
19MODULE_LICENSE("GPL");
20
21static int index[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = -2};
22static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
23static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE;
24#ifdef CONFIG_PNP
25static bool pnp[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1};
26#endif
27static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;
28static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ;
29static bool uart_enter[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1};
30
31module_param_array(index, int, NULL, 0444);
32MODULE_PARM_DESC(index, "Index value for MPU-401 device.");
33module_param_array(id, charp, NULL, 0444);
34MODULE_PARM_DESC(id, "ID string for MPU-401 device.");
35module_param_array(enable, bool, NULL, 0444);
36MODULE_PARM_DESC(enable, "Enable MPU-401 device.");
37#ifdef CONFIG_PNP
38module_param_array(pnp, bool, NULL, 0444);
39MODULE_PARM_DESC(pnp, "PnP detection for MPU-401 device.");
40#endif
41module_param_hw_array(port, long, ioport, NULL, 0444);
42MODULE_PARM_DESC(port, "Port # for MPU-401 device.");
43module_param_hw_array(irq, int, irq, NULL, 0444);
44MODULE_PARM_DESC(irq, "IRQ # for MPU-401 device.");
45module_param_array(uart_enter, bool, NULL, 0444);
46MODULE_PARM_DESC(uart_enter, "Issue UART_ENTER command at open.");
47
48static struct platform_device *platform_devices[SNDRV_CARDS];
49static int pnp_registered;
50static unsigned int snd_mpu401_devices;
51
52static int snd_mpu401_create(struct device *devptr, int dev,
53 struct snd_card **rcard)
54{
55 struct snd_card *card;
56 int err;
57
58 if (!uart_enter[dev])
59 snd_printk(KERN_ERR "the uart_enter option is obsolete; remove it\n");
60
61 *rcard = NULL;
62 err = snd_card_new(devptr, index[dev], id[dev], THIS_MODULE,
63 0, &card);
64 if (err < 0)
65 return err;
66 strcpy(card->driver, "MPU-401 UART");
67 strcpy(card->shortname, card->driver);
68 sprintf(card->longname, "%s at %#lx, ", card->shortname, port[dev]);
69 if (irq[dev] >= 0) {
70 sprintf(card->longname + strlen(card->longname), "irq %d", irq[dev]);
71 } else {
72 strcat(card->longname, "polled");
73 }
74
75 err = snd_mpu401_uart_new(card, 0, MPU401_HW_MPU401, port[dev], 0,
76 irq[dev], NULL);
77 if (err < 0) {
78 printk(KERN_ERR "MPU401 not detected at 0x%lx\n", port[dev]);
79 goto _err;
80 }
81
82 *rcard = card;
83 return 0;
84
85 _err:
86 snd_card_free(card);
87 return err;
88}
89
90static int snd_mpu401_probe(struct platform_device *devptr)
91{
92 int dev = devptr->id;
93 int err;
94 struct snd_card *card;
95
96 if (port[dev] == SNDRV_AUTO_PORT) {
97 snd_printk(KERN_ERR "specify port\n");
98 return -EINVAL;
99 }
100 if (irq[dev] == SNDRV_AUTO_IRQ) {
101 snd_printk(KERN_ERR "specify or disable IRQ\n");
102 return -EINVAL;
103 }
104 err = snd_mpu401_create(&devptr->dev, dev, &card);
105 if (err < 0)
106 return err;
107 if ((err = snd_card_register(card)) < 0) {
108 snd_card_free(card);
109 return err;
110 }
111 platform_set_drvdata(devptr, card);
112 return 0;
113}
114
115static int snd_mpu401_remove(struct platform_device *devptr)
116{
117 snd_card_free(platform_get_drvdata(devptr));
118 return 0;
119}
120
121#define SND_MPU401_DRIVER "snd_mpu401"
122
123static struct platform_driver snd_mpu401_driver = {
124 .probe = snd_mpu401_probe,
125 .remove = snd_mpu401_remove,
126 .driver = {
127 .name = SND_MPU401_DRIVER,
128 },
129};
130
131
132#ifdef CONFIG_PNP
133
134#define IO_EXTENT 2
135
136static const struct pnp_device_id snd_mpu401_pnpids[] = {
137 { .id = "PNPb006" },
138 { .id = "" }
139};
140
141MODULE_DEVICE_TABLE(pnp, snd_mpu401_pnpids);
142
143static int snd_mpu401_pnp(int dev, struct pnp_dev *device,
144 const struct pnp_device_id *id)
145{
146 if (!pnp_port_valid(device, 0) ||
147 pnp_port_flags(device, 0) & IORESOURCE_DISABLED) {
148 snd_printk(KERN_ERR "no PnP port\n");
149 return -ENODEV;
150 }
151 if (pnp_port_len(device, 0) < IO_EXTENT) {
152 snd_printk(KERN_ERR "PnP port length is %llu, expected %d\n",
153 (unsigned long long)pnp_port_len(device, 0),
154 IO_EXTENT);
155 return -ENODEV;
156 }
157 port[dev] = pnp_port_start(device, 0);
158
159 if (!pnp_irq_valid(device, 0) ||
160 pnp_irq_flags(device, 0) & IORESOURCE_DISABLED) {
161 snd_printk(KERN_WARNING "no PnP irq, using polling\n");
162 irq[dev] = -1;
163 } else {
164 irq[dev] = pnp_irq(device, 0);
165 }
166 return 0;
167}
168
169static int snd_mpu401_pnp_probe(struct pnp_dev *pnp_dev,
170 const struct pnp_device_id *id)
171{
172 static int dev;
173 struct snd_card *card;
174 int err;
175
176 for ( ; dev < SNDRV_CARDS; ++dev) {
177 if (!enable[dev] || !pnp[dev])
178 continue;
179 err = snd_mpu401_pnp(dev, pnp_dev, id);
180 if (err < 0)
181 return err;
182 err = snd_mpu401_create(&pnp_dev->dev, dev, &card);
183 if (err < 0)
184 return err;
185 if ((err = snd_card_register(card)) < 0) {
186 snd_card_free(card);
187 return err;
188 }
189 pnp_set_drvdata(pnp_dev, card);
190 snd_mpu401_devices++;
191 ++dev;
192 return 0;
193 }
194 return -ENODEV;
195}
196
197static void snd_mpu401_pnp_remove(struct pnp_dev *dev)
198{
199 struct snd_card *card = (struct snd_card *) pnp_get_drvdata(dev);
200
201 snd_card_disconnect(card);
202 snd_card_free_when_closed(card);
203}
204
205static struct pnp_driver snd_mpu401_pnp_driver = {
206 .name = "mpu401",
207 .id_table = snd_mpu401_pnpids,
208 .probe = snd_mpu401_pnp_probe,
209 .remove = snd_mpu401_pnp_remove,
210};
211#else
212static struct pnp_driver snd_mpu401_pnp_driver;
213#endif
214
215static void snd_mpu401_unregister_all(void)
216{
217 int i;
218
219 if (pnp_registered)
220 pnp_unregister_driver(&snd_mpu401_pnp_driver);
221 for (i = 0; i < ARRAY_SIZE(platform_devices); ++i)
222 platform_device_unregister(platform_devices[i]);
223 platform_driver_unregister(&snd_mpu401_driver);
224}
225
226static int __init alsa_card_mpu401_init(void)
227{
228 int i, err;
229
230 if ((err = platform_driver_register(&snd_mpu401_driver)) < 0)
231 return err;
232
233 for (i = 0; i < SNDRV_CARDS; i++) {
234 struct platform_device *device;
235 if (! enable[i])
236 continue;
237#ifdef CONFIG_PNP
238 if (pnp[i])
239 continue;
240#endif
241 device = platform_device_register_simple(SND_MPU401_DRIVER,
242 i, NULL, 0);
243 if (IS_ERR(device))
244 continue;
245 if (!platform_get_drvdata(device)) {
246 platform_device_unregister(device);
247 continue;
248 }
249 platform_devices[i] = device;
250 snd_mpu401_devices++;
251 }
252 err = pnp_register_driver(&snd_mpu401_pnp_driver);
253 if (!err)
254 pnp_registered = 1;
255
256 if (!snd_mpu401_devices) {
257#ifdef MODULE
258 printk(KERN_ERR "MPU-401 device not found or device busy\n");
259#endif
260 snd_mpu401_unregister_all();
261 return -ENODEV;
262 }
263 return 0;
264}
265
266static void __exit alsa_card_mpu401_exit(void)
267{
268 snd_mpu401_unregister_all();
269}
270
271module_init(alsa_card_mpu401_init)
272module_exit(alsa_card_mpu401_exit)
273
