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 static int uart_enter[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1}; 46 47 module_param_array(index, int, NULL, 0444); 48 MODULE_PARM_DESC(index, "Index value for MPU-401 device."); 49 module_param_array(id, charp, NULL, 0444); 50 MODULE_PARM_DESC(id, "ID string for MPU-401 device."); 51 module_param_array(enable, bool, NULL, 0444); 52 MODULE_PARM_DESC(enable, "Enable MPU-401 device."); 53 #ifdef CONFIG_PNP 54 module_param_array(pnp, bool, NULL, 0444); 55 MODULE_PARM_DESC(pnp, "PnP detection for MPU-401 device."); 56 #endif 57 module_param_array(port, long, NULL, 0444); 58 MODULE_PARM_DESC(port, "Port # for MPU-401 device."); 59 module_param_array(irq, int, NULL, 0444); 60 MODULE_PARM_DESC(irq, "IRQ # for MPU-401 device."); 61 module_param_array(uart_enter, bool, NULL, 0444); 62 MODULE_PARM_DESC(uart_enter, "Issue UART_ENTER command at open."); 63 64 static struct platform_device *platform_devices[SNDRV_CARDS]; 65 static int pnp_registered; 66 static unsigned int snd_mpu401_devices; 67 68 static int snd_mpu401_create(int dev, struct snd_card **rcard) 69 { 70 struct snd_card *card; 71 int err; 72 73 *rcard = NULL; 74 card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0); 75 if (card == NULL) 76 return -ENOMEM; 77 strcpy(card->driver, "MPU-401 UART"); 78 strcpy(card->shortname, card->driver); 79 sprintf(card->longname, "%s at %#lx, ", card->shortname, port[dev]); 80 if (irq[dev] >= 0) { 81 sprintf(card->longname + strlen(card->longname), "irq %d", irq[dev]); 82 } else { 83 strcat(card->longname, "polled"); 84 } 85 86 err = snd_mpu401_uart_new(card, 0, MPU401_HW_MPU401, port[dev], 87 uart_enter[dev] ? 0 : MPU401_INFO_UART_ONLY, 88 irq[dev], irq[dev] >= 0 ? IRQF_DISABLED : 0, 89 NULL); 90 if (err < 0) { 91 printk(KERN_ERR "MPU401 not detected at 0x%lx\n", port[dev]); 92 goto _err; 93 } 94 95 *rcard = card; 96 return 0; 97 98 _err: 99 snd_card_free(card); 100 return err; 101 } 102 103 static int __devinit snd_mpu401_probe(struct platform_device *devptr) 104 { 105 int dev = devptr->id; 106 int err; 107 struct snd_card *card; 108 109 if (port[dev] == SNDRV_AUTO_PORT) { 110 snd_printk(KERN_ERR "specify port\n"); 111 return -EINVAL; 112 } 113 if (irq[dev] == SNDRV_AUTO_IRQ) { 114 snd_printk(KERN_ERR "specify or disable IRQ\n"); 115 return -EINVAL; 116 } 117 err = snd_mpu401_create(dev, &card); 118 if (err < 0) 119 return err; 120 snd_card_set_dev(card, &devptr->dev); 121 if ((err = snd_card_register(card)) < 0) { 122 snd_card_free(card); 123 return err; 124 } 125 platform_set_drvdata(devptr, card); 126 return 0; 127 } 128 129 static int __devexit snd_mpu401_remove(struct platform_device *devptr) 130 { 131 snd_card_free(platform_get_drvdata(devptr)); 132 platform_set_drvdata(devptr, NULL); 133 return 0; 134 } 135 136 #define SND_MPU401_DRIVER "snd_mpu401" 137 138 static struct platform_driver snd_mpu401_driver = { 139 .probe = snd_mpu401_probe, 140 .remove = __devexit_p(snd_mpu401_remove), 141 .driver = { 142 .name = SND_MPU401_DRIVER 143 }, 144 }; 145 146 147 #ifdef CONFIG_PNP 148 149 #define IO_EXTENT 2 150 151 static struct pnp_device_id snd_mpu401_pnpids[] = { 152 { .id = "PNPb006" }, 153 { .id = "" } 154 }; 155 156 MODULE_DEVICE_TABLE(pnp, snd_mpu401_pnpids); 157 158 static int __devinit snd_mpu401_pnp(int dev, struct pnp_dev *device, 159 const struct pnp_device_id *id) 160 { 161 if (!pnp_port_valid(device, 0) || 162 pnp_port_flags(device, 0) & IORESOURCE_DISABLED) { 163 snd_printk(KERN_ERR "no PnP port\n"); 164 return -ENODEV; 165 } 166 if (pnp_port_len(device, 0) < IO_EXTENT) { 167 snd_printk(KERN_ERR "PnP port length is %llu, expected %d\n", 168 (unsigned long long)pnp_port_len(device, 0), 169 IO_EXTENT); 170 return -ENODEV; 171 } 172 port[dev] = pnp_port_start(device, 0); 173 174 if (!pnp_irq_valid(device, 0) || 175 pnp_irq_flags(device, 0) & IORESOURCE_DISABLED) { 176 snd_printk(KERN_WARNING "no PnP irq, using polling\n"); 177 irq[dev] = -1; 178 } else { 179 irq[dev] = pnp_irq(device, 0); 180 } 181 return 0; 182 } 183 184 static int __devinit snd_mpu401_pnp_probe(struct pnp_dev *pnp_dev, 185 const struct pnp_device_id *id) 186 { 187 static int dev; 188 struct snd_card *card; 189 int err; 190 191 for ( ; dev < SNDRV_CARDS; ++dev) { 192 if (!enable[dev] || !pnp[dev]) 193 continue; 194 err = snd_mpu401_pnp(dev, pnp_dev, id); 195 if (err < 0) 196 return err; 197 err = snd_mpu401_create(dev, &card); 198 if (err < 0) 199 return err; 200 if ((err = snd_card_register(card)) < 0) { 201 snd_card_free(card); 202 return err; 203 } 204 snd_card_set_dev(card, &pnp_dev->dev); 205 pnp_set_drvdata(pnp_dev, card); 206 snd_mpu401_devices++; 207 ++dev; 208 return 0; 209 } 210 return -ENODEV; 211 } 212 213 static void __devexit snd_mpu401_pnp_remove(struct pnp_dev *dev) 214 { 215 struct snd_card *card = (struct snd_card *) pnp_get_drvdata(dev); 216 217 snd_card_disconnect(card); 218 snd_card_free_when_closed(card); 219 } 220 221 static struct pnp_driver snd_mpu401_pnp_driver = { 222 .name = "mpu401", 223 .id_table = snd_mpu401_pnpids, 224 .probe = snd_mpu401_pnp_probe, 225 .remove = __devexit_p(snd_mpu401_pnp_remove), 226 }; 227 #else 228 static struct pnp_driver snd_mpu401_pnp_driver; 229 #endif 230 231 static void __init_or_module snd_mpu401_unregister_all(void) 232 { 233 int i; 234 235 if (pnp_registered) 236 pnp_unregister_driver(&snd_mpu401_pnp_driver); 237 for (i = 0; i < ARRAY_SIZE(platform_devices); ++i) 238 platform_device_unregister(platform_devices[i]); 239 platform_driver_unregister(&snd_mpu401_driver); 240 } 241 242 static int __init alsa_card_mpu401_init(void) 243 { 244 int i, err; 245 246 if ((err = platform_driver_register(&snd_mpu401_driver)) < 0) 247 return err; 248 249 for (i = 0; i < SNDRV_CARDS; i++) { 250 struct platform_device *device; 251 if (! enable[i]) 252 continue; 253 #ifdef CONFIG_PNP 254 if (pnp[i]) 255 continue; 256 #endif 257 device = platform_device_register_simple(SND_MPU401_DRIVER, 258 i, NULL, 0); 259 if (IS_ERR(device)) 260 continue; 261 if (!platform_get_drvdata(device)) { 262 platform_device_unregister(device); 263 continue; 264 } 265 platform_devices[i] = device; 266 snd_mpu401_devices++; 267 } 268 err = pnp_register_driver(&snd_mpu401_pnp_driver); 269 if (!err) 270 pnp_registered = 1; 271 272 if (!snd_mpu401_devices) { 273 #ifdef MODULE 274 printk(KERN_ERR "MPU-401 device not found or device busy\n"); 275 #endif 276 snd_mpu401_unregister_all(); 277 return -ENODEV; 278 } 279 return 0; 280 } 281 282 static void __exit alsa_card_mpu401_exit(void) 283 { 284 snd_mpu401_unregister_all(); 285 } 286 287 module_init(alsa_card_mpu401_init) 288 module_exit(alsa_card_mpu401_exit) 289