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; 63 static unsigned int snd_mpu401_devices; 64 65 static int snd_mpu401_create(int dev, struct snd_card **rcard) 66 { 67 struct snd_card *card; 68 int err; 69 70 *rcard = NULL; 71 card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0); 72 if (card == NULL) 73 return -ENOMEM; 74 strcpy(card->driver, "MPU-401 UART"); 75 strcpy(card->shortname, card->driver); 76 sprintf(card->longname, "%s at %#lx, ", card->shortname, port[dev]); 77 if (irq[dev] >= 0) { 78 sprintf(card->longname + strlen(card->longname), "irq %d", irq[dev]); 79 } else { 80 strcat(card->longname, "polled"); 81 } 82 83 if ((err = snd_mpu401_uart_new(card, 0, 84 MPU401_HW_MPU401, 85 port[dev], 0, 86 irq[dev], irq[dev] >= 0 ? SA_INTERRUPT : 0, NULL)) < 0) { 87 printk(KERN_ERR "MPU401 not detected at 0x%lx\n", port[dev]); 88 goto _err; 89 } 90 91 *rcard = card; 92 return 0; 93 94 _err: 95 snd_card_free(card); 96 return err; 97 } 98 99 static int __devinit snd_mpu401_probe(struct platform_device *devptr) 100 { 101 int dev = devptr->id; 102 int err; 103 struct snd_card *card; 104 105 if (port[dev] == SNDRV_AUTO_PORT) { 106 snd_printk(KERN_ERR "specify port\n"); 107 return -EINVAL; 108 } 109 if (irq[dev] == SNDRV_AUTO_IRQ) { 110 snd_printk(KERN_ERR "specify or disable IRQ\n"); 111 return -EINVAL; 112 } 113 err = snd_mpu401_create(dev, &card); 114 if (err < 0) 115 return err; 116 snd_card_set_dev(card, &devptr->dev); 117 if ((err = snd_card_register(card)) < 0) { 118 snd_card_free(card); 119 return err; 120 } 121 platform_set_drvdata(devptr, card); 122 return 0; 123 } 124 125 static int __devexit snd_mpu401_remove(struct platform_device *devptr) 126 { 127 snd_card_free(platform_get_drvdata(devptr)); 128 platform_set_drvdata(devptr, NULL); 129 return 0; 130 } 131 132 #define SND_MPU401_DRIVER "snd_mpu401" 133 134 static struct platform_driver snd_mpu401_driver = { 135 .probe = snd_mpu401_probe, 136 .remove = __devexit_p(snd_mpu401_remove), 137 .driver = { 138 .name = SND_MPU401_DRIVER 139 }, 140 }; 141 142 143 #ifdef CONFIG_PNP 144 145 #define IO_EXTENT 2 146 147 static struct pnp_device_id snd_mpu401_pnpids[] = { 148 { .id = "PNPb006" }, 149 { .id = "" } 150 }; 151 152 MODULE_DEVICE_TABLE(pnp, snd_mpu401_pnpids); 153 154 static int __init snd_mpu401_pnp(int dev, struct pnp_dev *device, 155 const struct pnp_device_id *id) 156 { 157 if (!pnp_port_valid(device, 0) || 158 pnp_port_flags(device, 0) & IORESOURCE_DISABLED) { 159 snd_printk(KERN_ERR "no PnP port\n"); 160 return -ENODEV; 161 } 162 if (pnp_port_len(device, 0) < IO_EXTENT) { 163 snd_printk(KERN_ERR "PnP port length is %ld, expected %d\n", 164 pnp_port_len(device, 0), IO_EXTENT); 165 return -ENODEV; 166 } 167 port[dev] = pnp_port_start(device, 0); 168 169 if (!pnp_irq_valid(device, 0) || 170 pnp_irq_flags(device, 0) & IORESOURCE_DISABLED) { 171 snd_printk(KERN_WARNING "no PnP irq, using polling\n"); 172 irq[dev] = -1; 173 } else { 174 irq[dev] = pnp_irq(device, 0); 175 } 176 return 0; 177 } 178 179 static int __devinit snd_mpu401_pnp_probe(struct pnp_dev *pnp_dev, 180 const struct pnp_device_id *id) 181 { 182 static int dev; 183 struct snd_card *card; 184 int err; 185 186 for ( ; dev < SNDRV_CARDS; ++dev) { 187 if (!enable[dev] || !pnp[dev]) 188 continue; 189 err = snd_mpu401_pnp(dev, pnp_dev, id); 190 if (err < 0) 191 return err; 192 err = snd_mpu401_create(dev, &card); 193 if (err < 0) 194 return err; 195 if ((err = snd_card_register(card)) < 0) { 196 snd_card_free(card); 197 return err; 198 } 199 snd_card_set_dev(card, &pnp_dev->dev); 200 pnp_set_drvdata(pnp_dev, card); 201 snd_mpu401_devices++; 202 ++dev; 203 return 0; 204 } 205 return -ENODEV; 206 } 207 208 static void __devexit snd_mpu401_pnp_remove(struct pnp_dev *dev) 209 { 210 struct snd_card *card = (struct snd_card *) pnp_get_drvdata(dev); 211 212 snd_card_disconnect(card); 213 snd_card_free_in_thread(card); 214 } 215 216 static struct pnp_driver snd_mpu401_pnp_driver = { 217 .name = "mpu401", 218 .id_table = snd_mpu401_pnpids, 219 .probe = snd_mpu401_pnp_probe, 220 .remove = __devexit_p(snd_mpu401_pnp_remove), 221 }; 222 #else 223 static struct pnp_driver snd_mpu401_pnp_driver; 224 #endif 225 226 static void __init_or_module snd_mpu401_unregister_all(void) 227 { 228 int i; 229 230 if (pnp_registered) 231 pnp_unregister_driver(&snd_mpu401_pnp_driver); 232 for (i = 0; i < ARRAY_SIZE(platform_devices); ++i) 233 platform_device_unregister(platform_devices[i]); 234 platform_driver_unregister(&snd_mpu401_driver); 235 } 236 237 static int __init alsa_card_mpu401_init(void) 238 { 239 int i, err; 240 241 if ((err = platform_driver_register(&snd_mpu401_driver)) < 0) 242 return err; 243 244 for (i = 0; i < SNDRV_CARDS; i++) { 245 struct platform_device *device; 246 if (! enable[i]) 247 continue; 248 #ifdef CONFIG_PNP 249 if (pnp[i]) 250 continue; 251 #endif 252 device = platform_device_register_simple(SND_MPU401_DRIVER, 253 i, NULL, 0); 254 if (IS_ERR(device)) 255 continue; 256 platform_devices[i] = device; 257 snd_mpu401_devices++; 258 } 259 err = pnp_register_driver(&snd_mpu401_pnp_driver); 260 if (!err) 261 pnp_registered = 1; 262 263 if (!snd_mpu401_devices) { 264 #ifdef MODULE 265 printk(KERN_ERR "MPU-401 device not found or device busy\n"); 266 #endif 267 snd_mpu401_unregister_all(); 268 return -ENODEV; 269 } 270 return 0; 271 } 272 273 static void __exit alsa_card_mpu401_exit(void) 274 { 275 snd_mpu401_unregister_all(); 276 } 277 278 module_init(alsa_card_mpu401_init) 279 module_exit(alsa_card_mpu401_exit) 280