1 /* 2 * Driver for generic MPU-401 boards (UART mode only) 3 * Copyright (c) by Jaroslav Kysela <perex@perex.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 <linux/init.h> 24 #include <linux/pnp.h> 25 #include <linux/err.h> 26 #include <linux/platform_device.h> 27 #include <linux/module.h> 28 #include <sound/core.h> 29 #include <sound/mpu401.h> 30 #include <sound/initval.h> 31 32 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>"); 33 MODULE_DESCRIPTION("MPU-401 UART"); 34 MODULE_LICENSE("GPL"); 35 36 static int index[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = -2}; /* exclude the first card */ 37 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */ 38 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE; /* Enable this card */ 39 #ifdef CONFIG_PNP 40 static bool pnp[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1}; 41 #endif 42 static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT; /* MPU-401 port number */ 43 static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ; /* MPU-401 IRQ */ 44 static bool uart_enter[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1}; 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_hw_array(port, long, ioport, NULL, 0444); 57 MODULE_PARM_DESC(port, "Port # for MPU-401 device."); 58 module_param_hw_array(irq, int, irq, NULL, 0444); 59 MODULE_PARM_DESC(irq, "IRQ # for MPU-401 device."); 60 module_param_array(uart_enter, bool, NULL, 0444); 61 MODULE_PARM_DESC(uart_enter, "Issue UART_ENTER command at open."); 62 63 static struct platform_device *platform_devices[SNDRV_CARDS]; 64 static int pnp_registered; 65 static unsigned int snd_mpu401_devices; 66 67 static int snd_mpu401_create(struct device *devptr, int dev, 68 struct snd_card **rcard) 69 { 70 struct snd_card *card; 71 int err; 72 73 if (!uart_enter[dev]) 74 snd_printk(KERN_ERR "the uart_enter option is obsolete; remove it\n"); 75 76 *rcard = NULL; 77 err = snd_card_new(devptr, index[dev], id[dev], THIS_MODULE, 78 0, &card); 79 if (err < 0) 80 return err; 81 strcpy(card->driver, "MPU-401 UART"); 82 strcpy(card->shortname, card->driver); 83 sprintf(card->longname, "%s at %#lx, ", card->shortname, port[dev]); 84 if (irq[dev] >= 0) { 85 sprintf(card->longname + strlen(card->longname), "irq %d", irq[dev]); 86 } else { 87 strcat(card->longname, "polled"); 88 } 89 90 err = snd_mpu401_uart_new(card, 0, MPU401_HW_MPU401, port[dev], 0, 91 irq[dev], NULL); 92 if (err < 0) { 93 printk(KERN_ERR "MPU401 not detected at 0x%lx\n", port[dev]); 94 goto _err; 95 } 96 97 *rcard = card; 98 return 0; 99 100 _err: 101 snd_card_free(card); 102 return err; 103 } 104 105 static int snd_mpu401_probe(struct platform_device *devptr) 106 { 107 int dev = devptr->id; 108 int err; 109 struct snd_card *card; 110 111 if (port[dev] == SNDRV_AUTO_PORT) { 112 snd_printk(KERN_ERR "specify port\n"); 113 return -EINVAL; 114 } 115 if (irq[dev] == SNDRV_AUTO_IRQ) { 116 snd_printk(KERN_ERR "specify or disable IRQ\n"); 117 return -EINVAL; 118 } 119 err = snd_mpu401_create(&devptr->dev, dev, &card); 120 if (err < 0) 121 return err; 122 if ((err = snd_card_register(card)) < 0) { 123 snd_card_free(card); 124 return err; 125 } 126 platform_set_drvdata(devptr, card); 127 return 0; 128 } 129 130 static int snd_mpu401_remove(struct platform_device *devptr) 131 { 132 snd_card_free(platform_get_drvdata(devptr)); 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 = 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 const 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 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 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(&pnp_dev->dev, 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 pnp_set_drvdata(pnp_dev, card); 205 snd_mpu401_devices++; 206 ++dev; 207 return 0; 208 } 209 return -ENODEV; 210 } 211 212 static void snd_mpu401_pnp_remove(struct pnp_dev *dev) 213 { 214 struct snd_card *card = (struct snd_card *) pnp_get_drvdata(dev); 215 216 snd_card_disconnect(card); 217 snd_card_free_when_closed(card); 218 } 219 220 static struct pnp_driver snd_mpu401_pnp_driver = { 221 .name = "mpu401", 222 .id_table = snd_mpu401_pnpids, 223 .probe = snd_mpu401_pnp_probe, 224 .remove = snd_mpu401_pnp_remove, 225 }; 226 #else 227 static struct pnp_driver snd_mpu401_pnp_driver; 228 #endif 229 230 static void snd_mpu401_unregister_all(void) 231 { 232 int i; 233 234 if (pnp_registered) 235 pnp_unregister_driver(&snd_mpu401_pnp_driver); 236 for (i = 0; i < ARRAY_SIZE(platform_devices); ++i) 237 platform_device_unregister(platform_devices[i]); 238 platform_driver_unregister(&snd_mpu401_driver); 239 } 240 241 static int __init alsa_card_mpu401_init(void) 242 { 243 int i, err; 244 245 if ((err = platform_driver_register(&snd_mpu401_driver)) < 0) 246 return err; 247 248 for (i = 0; i < SNDRV_CARDS; i++) { 249 struct platform_device *device; 250 if (! enable[i]) 251 continue; 252 #ifdef CONFIG_PNP 253 if (pnp[i]) 254 continue; 255 #endif 256 device = platform_device_register_simple(SND_MPU401_DRIVER, 257 i, NULL, 0); 258 if (IS_ERR(device)) 259 continue; 260 if (!platform_get_drvdata(device)) { 261 platform_device_unregister(device); 262 continue; 263 } 264 platform_devices[i] = device; 265 snd_mpu401_devices++; 266 } 267 err = pnp_register_driver(&snd_mpu401_pnp_driver); 268 if (!err) 269 pnp_registered = 1; 270 271 if (!snd_mpu401_devices) { 272 #ifdef MODULE 273 printk(KERN_ERR "MPU-401 device not found or device busy\n"); 274 #endif 275 snd_mpu401_unregister_all(); 276 return -ENODEV; 277 } 278 return 0; 279 } 280 281 static void __exit alsa_card_mpu401_exit(void) 282 { 283 snd_mpu401_unregister_all(); 284 } 285 286 module_init(alsa_card_mpu401_init) 287 module_exit(alsa_card_mpu401_exit) 288