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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59 snd_printk(KERN_ERR "the uart_enter option is obsolete; remove it\n");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 err = snd_card_register(card);
108 if (err < 0) {
109 snd_card_free(card);
110 return err;
111 }
112 platform_set_drvdata(devptr, card);
113 return 0;
114}
115
116static int snd_mpu401_remove(struct platform_device *devptr)
117{
118 snd_card_free(platform_get_drvdata(devptr));
119 return 0;
120}
121
122#define SND_MPU401_DRIVER "snd_mpu401"
123
124static struct platform_driver snd_mpu401_driver = {
125 .probe = snd_mpu401_probe,
126 .remove = snd_mpu401_remove,
127 .driver = {
128 .name = SND_MPU401_DRIVER,
129 },
130};
131
132
133#ifdef CONFIG_PNP
134
135#define IO_EXTENT 2
136
137static const struct pnp_device_id snd_mpu401_pnpids[] = {
138 { .id = "PNPb006" },
139 { .id = "" }
140};
141
142MODULE_DEVICE_TABLE(pnp, snd_mpu401_pnpids);
143
144static int snd_mpu401_pnp(int dev, struct pnp_dev *device,
145 const struct pnp_device_id *id)
146{
147 if (!pnp_port_valid(device, 0) ||
148 pnp_port_flags(device, 0) & IORESOURCE_DISABLED) {
149 snd_printk(KERN_ERR "no PnP port\n");
150 return -ENODEV;
151 }
152 if (pnp_port_len(device, 0) < IO_EXTENT) {
153 snd_printk(KERN_ERR "PnP port length is %llu, expected %d\n",
154 (unsigned long long)pnp_port_len(device, 0),
155 IO_EXTENT);
156 return -ENODEV;
157 }
158 port[dev] = pnp_port_start(device, 0);
159
160 if (!pnp_irq_valid(device, 0) ||
161 pnp_irq_flags(device, 0) & IORESOURCE_DISABLED) {
162 snd_printk(KERN_WARNING "no PnP irq, using polling\n");
163 irq[dev] = -1;
164 } else {
165 irq[dev] = pnp_irq(device, 0);
166 }
167 return 0;
168}
169
170static int snd_mpu401_pnp_probe(struct pnp_dev *pnp_dev,
171 const struct pnp_device_id *id)
172{
173 static int dev;
174 struct snd_card *card;
175 int err;
176
177 for ( ; dev < SNDRV_CARDS; ++dev) {
178 if (!enable[dev] || !pnp[dev])
179 continue;
180 err = snd_mpu401_pnp(dev, pnp_dev, id);
181 if (err < 0)
182 return err;
183 err = snd_mpu401_create(&pnp_dev->dev, dev, &card);
184 if (err < 0)
185 return err;
186 err = snd_card_register(card);
187 if (err < 0) {
188 snd_card_free(card);
189 return err;
190 }
191 pnp_set_drvdata(pnp_dev, card);
192 snd_mpu401_devices++;
193 ++dev;
194 return 0;
195 }
196 return -ENODEV;
197}
198
199static void snd_mpu401_pnp_remove(struct pnp_dev *dev)
200{
201 struct snd_card *card = (struct snd_card *) pnp_get_drvdata(dev);
202
203 snd_card_disconnect(card);
204 snd_card_free_when_closed(card);
205}
206
207static struct pnp_driver snd_mpu401_pnp_driver = {
208 .name = "mpu401",
209 .id_table = snd_mpu401_pnpids,
210 .probe = snd_mpu401_pnp_probe,
211 .remove = snd_mpu401_pnp_remove,
212};
213#else
214static struct pnp_driver snd_mpu401_pnp_driver;
215#endif
216
217static void snd_mpu401_unregister_all(void)
218{
219 int i;
220
221 if (pnp_registered)
222 pnp_unregister_driver(&snd_mpu401_pnp_driver);
223 for (i = 0; i < ARRAY_SIZE(platform_devices); ++i)
224 platform_device_unregister(platform_devices[i]);
225 platform_driver_unregister(&snd_mpu401_driver);
226}
227
228static int __init alsa_card_mpu401_init(void)
229{
230 int i, err;
231
232 err = platform_driver_register(&snd_mpu401_driver);
233 if (err < 0)
234 return err;
235
236 for (i = 0; i < SNDRV_CARDS; i++) {
237 struct platform_device *device;
238 if (! enable[i])
239 continue;
240#ifdef CONFIG_PNP
241 if (pnp[i])
242 continue;
243#endif
244 device = platform_device_register_simple(SND_MPU401_DRIVER,
245 i, NULL, 0);
246 if (IS_ERR(device))
247 continue;
248 if (!platform_get_drvdata(device)) {
249 platform_device_unregister(device);
250 continue;
251 }
252 platform_devices[i] = device;
253 snd_mpu401_devices++;
254 }
255 err = pnp_register_driver(&snd_mpu401_pnp_driver);
256 if (!err)
257 pnp_registered = 1;
258
259 if (!snd_mpu401_devices) {
260#ifdef MODULE
261 printk(KERN_ERR "MPU-401 device not found or device busy\n");
262#endif
263 snd_mpu401_unregister_all();
264 return -ENODEV;
265 }
266 return 0;
267}
268
269static void __exit alsa_card_mpu401_exit(void)
270{
271 snd_mpu401_unregister_all();
272}
273
274module_init(alsa_card_mpu401_init)
275module_exit(alsa_card_mpu401_exit)
276
