1 /* 2 * Driver for generic MPU-401 boards (UART mode only) 3 * Copyright (c) by Jaroslav Kysela <perex@suse.cz> 4 * Copyright (c) 2004 by Castet Matthieu <castet.matthieu@free.fr> 5 * 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 20 * 21 */ 22 23 #include <sound/driver.h> 24 #include <linux/init.h> 25 #include <linux/pnp.h> 26 #include <linux/err.h> 27 #include <linux/platform_device.h> 28 #include <linux/moduleparam.h> 29 #include <sound/core.h> 30 #include <sound/mpu401.h> 31 #include <sound/initval.h> 32 33 MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>"); 34 MODULE_DESCRIPTION("MPU-401 UART"); 35 MODULE_LICENSE("GPL"); 36 37 static int index[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = -2}; /* exclude the first card */ 38 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */ 39 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE; /* Enable this card */ 40 #ifdef CONFIG_PNP 41 static int pnp[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1}; 42 #endif 43 static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT; /* MPU-401 port number */ 44 static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ; /* MPU-401 IRQ */ 45 46 module_param_array(index, int, NULL, 0444); 47 MODULE_PARM_DESC(index, "Index value for MPU-401 device."); 48 module_param_array(id, charp, NULL, 0444); 49 MODULE_PARM_DESC(id, "ID string for MPU-401 device."); 50 module_param_array(enable, bool, NULL, 0444); 51 MODULE_PARM_DESC(enable, "Enable MPU-401 device."); 52 #ifdef CONFIG_PNP 53 module_param_array(pnp, bool, NULL, 0444); 54 MODULE_PARM_DESC(pnp, "PnP detection for MPU-401 device."); 55 #endif 56 module_param_array(port, long, NULL, 0444); 57 MODULE_PARM_DESC(port, "Port # for MPU-401 device."); 58 module_param_array(irq, int, NULL, 0444); 59 MODULE_PARM_DESC(irq, "IRQ # for MPU-401 device."); 60 61 static struct platform_device *platform_devices[SNDRV_CARDS]; 62 static int pnp_registered = 0; 63 64 static int snd_mpu401_create(int dev, struct snd_card **rcard) 65 { 66 struct snd_card *card; 67 int err; 68 69 *rcard = NULL; 70 card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0); 71 if (card == NULL) 72 return -ENOMEM; 73 strcpy(card->driver, "MPU-401 UART"); 74 strcpy(card->shortname, card->driver); 75 sprintf(card->longname, "%s at %#lx, ", card->shortname, port[dev]); 76 if (irq[dev] >= 0) { 77 sprintf(card->longname + strlen(card->longname), "irq %d", irq[dev]); 78 } else { 79 strcat(card->longname, "polled"); 80 } 81 82 if ((err = snd_mpu401_uart_new(card, 0, 83 MPU401_HW_MPU401, 84 port[dev], 0, 85 irq[dev], irq[dev] >= 0 ? SA_INTERRUPT : 0, NULL)) < 0) { 86 printk(KERN_ERR "MPU401 not detected at 0x%lx\n", port[dev]); 87 goto _err; 88 } 89 90 *rcard = card; 91 return 0; 92 93 _err: 94 snd_card_free(card); 95 return err; 96 } 97 98 static int __devinit snd_mpu401_probe(struct platform_device *devptr) 99 { 100 int dev = devptr->id; 101 int err; 102 struct snd_card *card; 103 104 if (port[dev] == SNDRV_AUTO_PORT) { 105 snd_printk(KERN_ERR "specify port\n"); 106 return -EINVAL; 107 } 108 if (irq[dev] == SNDRV_AUTO_IRQ) { 109 snd_printk(KERN_ERR "specify or disable IRQ\n"); 110 return -EINVAL; 111 } 112 err = snd_mpu401_create(dev, &card); 113 if (err < 0) 114 return err; 115 snd_card_set_dev(card, &devptr->dev); 116 if ((err = snd_card_register(card)) < 0) { 117 snd_card_free(card); 118 return err; 119 } 120 platform_set_drvdata(devptr, card); 121 return 0; 122 } 123 124 static int __devexit snd_mpu401_remove(struct platform_device *devptr) 125 { 126 snd_card_free(platform_get_drvdata(devptr)); 127 platform_set_drvdata(devptr, NULL); 128 return 0; 129 } 130 131 #define SND_MPU401_DRIVER "snd_mpu401" 132 133 static struct platform_driver snd_mpu401_driver = { 134 .probe = snd_mpu401_probe, 135 .remove = __devexit_p(snd_mpu401_remove), 136 .driver = { 137 .name = SND_MPU401_DRIVER 138 }, 139 }; 140 141 142 #ifdef CONFIG_PNP 143 144 #define IO_EXTENT 2 145 146 static struct pnp_device_id snd_mpu401_pnpids[] = { 147 { .id = "PNPb006" }, 148 { .id = "" } 149 }; 150 151 MODULE_DEVICE_TABLE(pnp, snd_mpu401_pnpids); 152 153 static int __init snd_mpu401_pnp(int dev, struct pnp_dev *device, 154 const struct pnp_device_id *id) 155 { 156 if (!pnp_port_valid(device, 0) || 157 pnp_port_flags(device, 0) & IORESOURCE_DISABLED) { 158 snd_printk(KERN_ERR "no PnP port\n"); 159 return -ENODEV; 160 } 161 if (pnp_port_len(device, 0) < IO_EXTENT) { 162 snd_printk(KERN_ERR "PnP port length is %ld, expected %d\n", 163 pnp_port_len(device, 0), IO_EXTENT); 164 return -ENODEV; 165 } 166 port[dev] = pnp_port_start(device, 0); 167 168 if (!pnp_irq_valid(device, 0) || 169 pnp_irq_flags(device, 0) & IORESOURCE_DISABLED) { 170 snd_printk(KERN_WARNING "no PnP irq, using polling\n"); 171 irq[dev] = -1; 172 } else { 173 irq[dev] = pnp_irq(device, 0); 174 } 175 return 0; 176 } 177 178 static int __devinit snd_mpu401_pnp_probe(struct pnp_dev *pnp_dev, 179 const struct pnp_device_id *id) 180 { 181 static int dev; 182 struct snd_card *card; 183 int err; 184 185 for ( ; dev < SNDRV_CARDS; ++dev) { 186 if (!enable[dev] || !pnp[dev]) 187 continue; 188 err = snd_mpu401_pnp(dev, pnp_dev, id); 189 if (err < 0) 190 return err; 191 err = snd_mpu401_create(dev, &card); 192 if (err < 0) 193 return err; 194 if ((err = snd_card_register(card)) < 0) { 195 snd_card_free(card); 196 return err; 197 } 198 snd_card_set_dev(card, &pnp_dev->dev); 199 pnp_set_drvdata(pnp_dev, card); 200 ++dev; 201 return 0; 202 } 203 return -ENODEV; 204 } 205 206 static void __devexit snd_mpu401_pnp_remove(struct pnp_dev *dev) 207 { 208 struct snd_card *card = (struct snd_card *) pnp_get_drvdata(dev); 209 210 snd_card_disconnect(card); 211 snd_card_free_in_thread(card); 212 } 213 214 static struct pnp_driver snd_mpu401_pnp_driver = { 215 .name = "mpu401", 216 .id_table = snd_mpu401_pnpids, 217 .probe = snd_mpu401_pnp_probe, 218 .remove = __devexit_p(snd_mpu401_pnp_remove), 219 }; 220 #else 221 static struct pnp_driver snd_mpu401_pnp_driver; 222 #endif 223 224 static void __init_or_module snd_mpu401_unregister_all(void) 225 { 226 int i; 227 228 if (pnp_registered) 229 pnp_unregister_driver(&snd_mpu401_pnp_driver); 230 for (i = 0; i < ARRAY_SIZE(platform_devices); ++i) 231 platform_device_unregister(platform_devices[i]); 232 platform_driver_unregister(&snd_mpu401_driver); 233 } 234 235 static int __init alsa_card_mpu401_init(void) 236 { 237 int i, err, devices; 238 239 if ((err = platform_driver_register(&snd_mpu401_driver)) < 0) 240 return err; 241 242 devices = 0; 243 for (i = 0; i < SNDRV_CARDS && enable[i]; i++) { 244 struct platform_device *device; 245 #ifdef CONFIG_PNP 246 if (pnp[i]) 247 continue; 248 #endif 249 device = platform_device_register_simple(SND_MPU401_DRIVER, 250 i, NULL, 0); 251 if (IS_ERR(device)) { 252 err = PTR_ERR(device); 253 goto errout; 254 } 255 platform_devices[i] = device; 256 devices++; 257 } 258 if ((err = pnp_register_driver(&snd_mpu401_pnp_driver)) >= 0) { 259 pnp_registered = 1; 260 devices += err; 261 } 262 263 if (!devices) { 264 #ifdef MODULE 265 printk(KERN_ERR "MPU-401 device not found or device busy\n"); 266 #endif 267 err = -ENODEV; 268 goto errout; 269 } 270 return 0; 271 272 errout: 273 snd_mpu401_unregister_all(); 274 return err; 275 } 276 277 static void __exit alsa_card_mpu401_exit(void) 278 { 279 snd_mpu401_unregister_all(); 280 } 281 282 module_init(alsa_card_mpu401_init) 283 module_exit(alsa_card_mpu401_exit) 284