Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * serial.c |
| 3 | * Copyright (c) by Jaroslav Kysela <perex@suse.cz>, |
| 4 | * Isaku Yamahata <yamahata@private.email.ne.jp>, |
| 5 | * George Hansper <ghansper@apana.org.au>, |
| 6 | * Hannu Savolainen |
| 7 | * |
| 8 | * This code is based on the code from ALSA 0.5.9, but heavily rewritten. |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License as published by |
| 12 | * the Free Software Foundation; either version 2 of the License, or |
| 13 | * (at your option) any later version. |
| 14 | * |
| 15 | * This program is distributed in the hope that it will be useful, |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | * GNU General Public License for more details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU General Public License |
| 21 | * along with this program; if not, write to the Free Software |
| 22 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 23 | * |
| 24 | * Sat Mar 31 17:27:57 PST 2001 tim.mann@compaq.com |
| 25 | * Added support for the Midiator MS-124T and for the MS-124W in |
| 26 | * Single Addressed (S/A) or Multiple Burst (M/B) mode, with |
| 27 | * power derived either parasitically from the serial port or |
| 28 | * from a separate power supply. |
| 29 | * |
| 30 | * More documentation can be found in serial-u16550.txt. |
| 31 | */ |
| 32 | |
| 33 | #include <sound/driver.h> |
| 34 | #include <linux/init.h> |
| 35 | #include <linux/interrupt.h> |
| 36 | #include <linux/slab.h> |
| 37 | #include <linux/ioport.h> |
| 38 | #include <linux/moduleparam.h> |
| 39 | #include <sound/core.h> |
| 40 | #include <sound/rawmidi.h> |
| 41 | #include <sound/initval.h> |
| 42 | |
| 43 | #include <linux/serial_reg.h> |
| 44 | |
| 45 | #include <asm/io.h> |
| 46 | |
| 47 | MODULE_DESCRIPTION("MIDI serial u16550"); |
| 48 | MODULE_LICENSE("GPL"); |
| 49 | MODULE_SUPPORTED_DEVICE("{{ALSA, MIDI serial u16550}}"); |
| 50 | |
| 51 | #define SNDRV_SERIAL_SOUNDCANVAS 0 /* Roland Soundcanvas; F5 NN selects part */ |
| 52 | #define SNDRV_SERIAL_MS124T 1 /* Midiator MS-124T */ |
| 53 | #define SNDRV_SERIAL_MS124W_SA 2 /* Midiator MS-124W in S/A mode */ |
| 54 | #define SNDRV_SERIAL_MS124W_MB 3 /* Midiator MS-124W in M/B mode */ |
| 55 | #define SNDRV_SERIAL_GENERIC 4 /* Generic Interface */ |
| 56 | #define SNDRV_SERIAL_MAX_ADAPTOR SNDRV_SERIAL_GENERIC |
| 57 | static char *adaptor_names[] = { |
| 58 | "Soundcanvas", |
| 59 | "MS-124T", |
| 60 | "MS-124W S/A", |
| 61 | "MS-124W M/B", |
| 62 | "Generic" |
| 63 | }; |
| 64 | |
| 65 | #define SNDRV_SERIAL_NORMALBUFF 0 /* Normal blocking buffer operation */ |
| 66 | #define SNDRV_SERIAL_DROPBUFF 1 /* Non-blocking discard operation */ |
| 67 | |
| 68 | static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */ |
| 69 | static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */ |
| 70 | static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE; /* Enable this card */ |
| 71 | static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT; /* 0x3f8,0x2f8,0x3e8,0x2e8 */ |
| 72 | static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ; /* 3,4,5,7,9,10,11,14,15 */ |
| 73 | static int speed[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 38400}; /* 9600,19200,38400,57600,115200 */ |
| 74 | static int base[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 115200}; /* baud base */ |
| 75 | static int outs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1}; /* 1 to 16 */ |
| 76 | static int ins[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1}; /* 1 to 16 */ |
| 77 | static int adaptor[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = SNDRV_SERIAL_SOUNDCANVAS}; |
| 78 | static int droponfull[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS -1)] = SNDRV_SERIAL_NORMALBUFF }; |
| 79 | |
| 80 | module_param_array(index, int, NULL, 0444); |
| 81 | MODULE_PARM_DESC(index, "Index value for Serial MIDI."); |
| 82 | module_param_array(id, charp, NULL, 0444); |
| 83 | MODULE_PARM_DESC(id, "ID string for Serial MIDI."); |
| 84 | module_param_array(enable, bool, NULL, 0444); |
| 85 | MODULE_PARM_DESC(enable, "Enable UART16550A chip."); |
| 86 | module_param_array(port, long, NULL, 0444); |
| 87 | MODULE_PARM_DESC(port, "Port # for UART16550A chip."); |
| 88 | module_param_array(irq, int, NULL, 0444); |
| 89 | MODULE_PARM_DESC(irq, "IRQ # for UART16550A chip."); |
| 90 | module_param_array(speed, int, NULL, 0444); |
| 91 | MODULE_PARM_DESC(speed, "Speed in bauds."); |
| 92 | module_param_array(base, int, NULL, 0444); |
| 93 | MODULE_PARM_DESC(base, "Base for divisor in bauds."); |
| 94 | module_param_array(outs, int, NULL, 0444); |
| 95 | MODULE_PARM_DESC(outs, "Number of MIDI outputs."); |
| 96 | module_param_array(ins, int, NULL, 0444); |
| 97 | MODULE_PARM_DESC(ins, "Number of MIDI inputs."); |
| 98 | module_param_array(droponfull, bool, NULL, 0444); |
| 99 | MODULE_PARM_DESC(droponfull, "Flag to enable drop-on-full buffer mode"); |
| 100 | |
| 101 | module_param_array(adaptor, int, NULL, 0444); |
| 102 | MODULE_PARM_DESC(adaptor, "Type of adaptor."); |
| 103 | |
| 104 | /*#define SNDRV_SERIAL_MS124W_MB_NOCOMBO 1*/ /* Address outs as 0-3 instead of bitmap */ |
| 105 | |
| 106 | #define SNDRV_SERIAL_MAX_OUTS 16 /* max 64, min 16 */ |
| 107 | #define SNDRV_SERIAL_MAX_INS 16 /* max 64, min 16 */ |
| 108 | |
| 109 | #define TX_BUFF_SIZE (1<<15) /* Must be 2^n */ |
| 110 | #define TX_BUFF_MASK (TX_BUFF_SIZE - 1) |
| 111 | |
| 112 | #define SERIAL_MODE_NOT_OPENED (0) |
| 113 | #define SERIAL_MODE_INPUT_OPEN (1 << 0) |
| 114 | #define SERIAL_MODE_OUTPUT_OPEN (1 << 1) |
| 115 | #define SERIAL_MODE_INPUT_TRIGGERED (1 << 2) |
| 116 | #define SERIAL_MODE_OUTPUT_TRIGGERED (1 << 3) |
| 117 | |
| 118 | typedef struct _snd_uart16550 { |
| 119 | snd_card_t *card; |
| 120 | snd_rawmidi_t *rmidi; |
| 121 | snd_rawmidi_substream_t *midi_output[SNDRV_SERIAL_MAX_OUTS]; |
| 122 | snd_rawmidi_substream_t *midi_input[SNDRV_SERIAL_MAX_INS]; |
| 123 | |
| 124 | int filemode; //open status of file |
| 125 | |
| 126 | spinlock_t open_lock; |
| 127 | |
| 128 | int irq; |
| 129 | |
| 130 | unsigned long base; |
| 131 | struct resource *res_base; |
| 132 | |
| 133 | unsigned int speed; |
| 134 | unsigned int speed_base; |
| 135 | unsigned char divisor; |
| 136 | |
| 137 | unsigned char old_divisor_lsb; |
| 138 | unsigned char old_divisor_msb; |
| 139 | unsigned char old_line_ctrl_reg; |
| 140 | |
| 141 | // parameter for using of write loop |
| 142 | short int fifo_limit; //used in uart16550 |
| 143 | short int fifo_count; //used in uart16550 |
| 144 | |
| 145 | // type of adaptor |
| 146 | int adaptor; |
| 147 | |
| 148 | // inputs |
| 149 | int prev_in; |
| 150 | unsigned char rstatus; |
| 151 | |
| 152 | // outputs |
| 153 | int prev_out; |
| 154 | unsigned char prev_status[SNDRV_SERIAL_MAX_OUTS]; |
| 155 | |
| 156 | // write buffer and its writing/reading position |
| 157 | unsigned char tx_buff[TX_BUFF_SIZE]; |
| 158 | int buff_in_count; |
| 159 | int buff_in; |
| 160 | int buff_out; |
| 161 | int drop_on_full; |
| 162 | |
| 163 | // wait timer |
| 164 | unsigned int timer_running:1; |
| 165 | struct timer_list buffer_timer; |
| 166 | |
| 167 | } snd_uart16550_t; |
| 168 | |
| 169 | static snd_card_t *snd_serial_cards[SNDRV_CARDS] = SNDRV_DEFAULT_PTR; |
| 170 | |
Jesper Juhl | 77933d7 | 2005-07-27 11:46:09 -0700 | [diff] [blame^] | 171 | static inline void snd_uart16550_add_timer(snd_uart16550_t *uart) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | { |
| 173 | if (! uart->timer_running) { |
| 174 | /* timer 38600bps * 10bit * 16byte */ |
| 175 | uart->buffer_timer.expires = jiffies + (HZ+255)/256; |
| 176 | uart->timer_running = 1; |
| 177 | add_timer(&uart->buffer_timer); |
| 178 | } |
| 179 | } |
| 180 | |
Jesper Juhl | 77933d7 | 2005-07-27 11:46:09 -0700 | [diff] [blame^] | 181 | static inline void snd_uart16550_del_timer(snd_uart16550_t *uart) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | { |
| 183 | if (uart->timer_running) { |
| 184 | del_timer(&uart->buffer_timer); |
| 185 | uart->timer_running = 0; |
| 186 | } |
| 187 | } |
| 188 | |
| 189 | /* This macro is only used in snd_uart16550_io_loop */ |
Jesper Juhl | 77933d7 | 2005-07-27 11:46:09 -0700 | [diff] [blame^] | 190 | static inline void snd_uart16550_buffer_output(snd_uart16550_t *uart) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | { |
| 192 | unsigned short buff_out = uart->buff_out; |
| 193 | if( uart->buff_in_count > 0 ) { |
| 194 | outb(uart->tx_buff[buff_out], uart->base + UART_TX); |
| 195 | uart->fifo_count++; |
| 196 | buff_out++; |
| 197 | buff_out &= TX_BUFF_MASK; |
| 198 | uart->buff_out = buff_out; |
| 199 | uart->buff_in_count--; |
| 200 | } |
| 201 | } |
| 202 | |
| 203 | /* This loop should be called with interrupts disabled |
| 204 | * We don't want to interrupt this, |
| 205 | * as we're already handling an interrupt |
| 206 | */ |
| 207 | static void snd_uart16550_io_loop(snd_uart16550_t * uart) |
| 208 | { |
| 209 | unsigned char c, status; |
| 210 | int substream; |
| 211 | |
| 212 | /* recall previous stream */ |
| 213 | substream = uart->prev_in; |
| 214 | |
| 215 | /* Read Loop */ |
| 216 | while ((status = inb(uart->base + UART_LSR)) & UART_LSR_DR) { |
| 217 | /* while receive data ready */ |
| 218 | c = inb(uart->base + UART_RX); |
| 219 | |
| 220 | /* keep track of last status byte */ |
| 221 | if (c & 0x80) { |
| 222 | uart->rstatus = c; |
| 223 | } |
| 224 | |
| 225 | /* handle stream switch */ |
| 226 | if (uart->adaptor == SNDRV_SERIAL_GENERIC) { |
| 227 | if (uart->rstatus == 0xf5) { |
| 228 | if (c <= SNDRV_SERIAL_MAX_INS && c > 0) |
| 229 | substream = c - 1; |
| 230 | if (c != 0xf5) |
| 231 | uart->rstatus = 0; /* prevent future bytes from being interpreted as streams */ |
| 232 | } |
| 233 | else if ((uart->filemode & SERIAL_MODE_INPUT_OPEN) && (uart->midi_input[substream] != NULL)) { |
| 234 | snd_rawmidi_receive(uart->midi_input[substream], &c, 1); |
| 235 | } |
| 236 | } else if ((uart->filemode & SERIAL_MODE_INPUT_OPEN) && (uart->midi_input[substream] != NULL)) { |
| 237 | snd_rawmidi_receive(uart->midi_input[substream], &c, 1); |
| 238 | } |
| 239 | |
| 240 | if (status & UART_LSR_OE) |
| 241 | snd_printk("%s: Overrun on device at 0x%lx\n", |
| 242 | uart->rmidi->name, uart->base); |
| 243 | } |
| 244 | |
| 245 | /* remember the last stream */ |
| 246 | uart->prev_in = substream; |
| 247 | |
| 248 | /* no need of check SERIAL_MODE_OUTPUT_OPEN because if not, |
| 249 | buffer is never filled. */ |
| 250 | /* Check write status */ |
| 251 | if (status & UART_LSR_THRE) { |
| 252 | uart->fifo_count = 0; |
| 253 | } |
| 254 | if (uart->adaptor == SNDRV_SERIAL_MS124W_SA |
| 255 | || uart->adaptor == SNDRV_SERIAL_GENERIC) { |
| 256 | /* Can't use FIFO, must send only when CTS is true */ |
| 257 | status = inb(uart->base + UART_MSR); |
| 258 | while( (uart->fifo_count == 0) && (status & UART_MSR_CTS) && |
| 259 | (uart->buff_in_count > 0) ) { |
| 260 | snd_uart16550_buffer_output(uart); |
| 261 | status = inb( uart->base + UART_MSR ); |
| 262 | } |
| 263 | } else { |
| 264 | /* Write loop */ |
| 265 | while (uart->fifo_count < uart->fifo_limit /* Can we write ? */ |
| 266 | && uart->buff_in_count > 0) /* Do we want to? */ |
| 267 | snd_uart16550_buffer_output(uart); |
| 268 | } |
| 269 | if (uart->irq < 0 && uart->buff_in_count > 0) |
| 270 | snd_uart16550_add_timer(uart); |
| 271 | } |
| 272 | |
| 273 | /* NOTES ON SERVICING INTERUPTS |
| 274 | * --------------------------- |
| 275 | * After receiving a interrupt, it is important to indicate to the UART that |
| 276 | * this has been done. |
| 277 | * For a Rx interrupt, this is done by reading the received byte. |
| 278 | * For a Tx interrupt this is done by either: |
| 279 | * a) Writing a byte |
| 280 | * b) Reading the IIR |
| 281 | * It is particularly important to read the IIR if a Tx interrupt is received |
| 282 | * when there is no data in tx_buff[], as in this case there no other |
| 283 | * indication that the interrupt has been serviced, and it remains outstanding |
| 284 | * indefinitely. This has the curious side effect that and no further interrupts |
| 285 | * will be generated from this device AT ALL!!. |
| 286 | * It is also desirable to clear outstanding interrupts when the device is |
| 287 | * opened/closed. |
| 288 | * |
| 289 | * |
| 290 | * Note that some devices need OUT2 to be set before they will generate |
| 291 | * interrupts at all. (Possibly tied to an internal pull-up on CTS?) |
| 292 | */ |
| 293 | static irqreturn_t snd_uart16550_interrupt(int irq, void *dev_id, struct pt_regs *regs) |
| 294 | { |
| 295 | snd_uart16550_t *uart; |
| 296 | |
| 297 | uart = (snd_uart16550_t *) dev_id; |
| 298 | spin_lock(&uart->open_lock); |
| 299 | if (uart->filemode == SERIAL_MODE_NOT_OPENED) { |
| 300 | spin_unlock(&uart->open_lock); |
| 301 | return IRQ_NONE; |
| 302 | } |
| 303 | inb(uart->base + UART_IIR); /* indicate to the UART that the interrupt has been serviced */ |
| 304 | snd_uart16550_io_loop(uart); |
| 305 | spin_unlock(&uart->open_lock); |
| 306 | return IRQ_HANDLED; |
| 307 | } |
| 308 | |
| 309 | /* When the polling mode, this function calls snd_uart16550_io_loop. */ |
| 310 | static void snd_uart16550_buffer_timer(unsigned long data) |
| 311 | { |
| 312 | unsigned long flags; |
| 313 | snd_uart16550_t *uart; |
| 314 | |
| 315 | uart = (snd_uart16550_t *)data; |
| 316 | spin_lock_irqsave(&uart->open_lock, flags); |
| 317 | snd_uart16550_del_timer(uart); |
| 318 | snd_uart16550_io_loop(uart); |
| 319 | spin_unlock_irqrestore(&uart->open_lock, flags); |
| 320 | } |
| 321 | |
| 322 | /* |
| 323 | * this method probes, if an uart sits on given port |
| 324 | * return 0 if found |
| 325 | * return negative error if not found |
| 326 | */ |
| 327 | static int __init snd_uart16550_detect(snd_uart16550_t *uart) |
| 328 | { |
| 329 | unsigned long io_base = uart->base; |
| 330 | int ok; |
| 331 | unsigned char c; |
| 332 | |
| 333 | /* Do some vague tests for the presence of the uart */ |
| 334 | if (io_base == 0 || io_base == SNDRV_AUTO_PORT) { |
| 335 | return -ENODEV; /* Not configured */ |
| 336 | } |
| 337 | |
| 338 | uart->res_base = request_region(io_base, 8, "Serial MIDI"); |
| 339 | if (uart->res_base == NULL) { |
| 340 | snd_printk(KERN_ERR "u16550: can't grab port 0x%lx\n", io_base); |
| 341 | return -EBUSY; |
| 342 | } |
| 343 | |
| 344 | ok = 1; /* uart detected unless one of the following tests should fail */ |
| 345 | /* 8 data-bits, 1 stop-bit, parity off, DLAB = 0 */ |
| 346 | outb(UART_LCR_WLEN8, io_base + UART_LCR); /* Line Control Register */ |
| 347 | c = inb(io_base + UART_IER); |
| 348 | /* The top four bits of the IER should always == 0 */ |
| 349 | if ((c & 0xf0) != 0) |
| 350 | ok = 0; /* failed */ |
| 351 | |
| 352 | outb(0xaa, io_base + UART_SCR); |
| 353 | /* Write arbitrary data into the scratch reg */ |
| 354 | c = inb(io_base + UART_SCR); |
| 355 | /* If it comes back, it's OK */ |
| 356 | if (c != 0xaa) |
| 357 | ok = 0; /* failed */ |
| 358 | |
| 359 | outb(0x55, io_base + UART_SCR); |
| 360 | /* Write arbitrary data into the scratch reg */ |
| 361 | c = inb(io_base + UART_SCR); |
| 362 | /* If it comes back, it's OK */ |
| 363 | if (c != 0x55) |
| 364 | ok = 0; /* failed */ |
| 365 | |
| 366 | return ok; |
| 367 | } |
| 368 | |
| 369 | static void snd_uart16550_do_open(snd_uart16550_t * uart) |
| 370 | { |
| 371 | char byte; |
| 372 | |
| 373 | /* Initialize basic variables */ |
| 374 | uart->buff_in_count = 0; |
| 375 | uart->buff_in = 0; |
| 376 | uart->buff_out = 0; |
| 377 | uart->fifo_limit = 1; |
| 378 | uart->fifo_count = 0; |
| 379 | uart->timer_running = 0; |
| 380 | |
| 381 | outb(UART_FCR_ENABLE_FIFO /* Enable FIFO's (if available) */ |
| 382 | | UART_FCR_CLEAR_RCVR /* Clear receiver FIFO */ |
| 383 | | UART_FCR_CLEAR_XMIT /* Clear transmitter FIFO */ |
| 384 | | UART_FCR_TRIGGER_4 /* Set FIFO trigger at 4-bytes */ |
| 385 | /* NOTE: interrupt generated after T=(time)4-bytes |
| 386 | * if less than UART_FCR_TRIGGER bytes received |
| 387 | */ |
| 388 | ,uart->base + UART_FCR); /* FIFO Control Register */ |
| 389 | |
| 390 | if ((inb(uart->base + UART_IIR) & 0xf0) == 0xc0) |
| 391 | uart->fifo_limit = 16; |
| 392 | if (uart->divisor != 0) { |
| 393 | uart->old_line_ctrl_reg = inb(uart->base + UART_LCR); |
| 394 | outb(UART_LCR_DLAB /* Divisor latch access bit */ |
| 395 | ,uart->base + UART_LCR); /* Line Control Register */ |
| 396 | uart->old_divisor_lsb = inb(uart->base + UART_DLL); |
| 397 | uart->old_divisor_msb = inb(uart->base + UART_DLM); |
| 398 | |
| 399 | outb(uart->divisor |
| 400 | ,uart->base + UART_DLL); /* Divisor Latch Low */ |
| 401 | outb(0 |
| 402 | ,uart->base + UART_DLM); /* Divisor Latch High */ |
| 403 | /* DLAB is reset to 0 in next outb() */ |
| 404 | } |
| 405 | /* Set serial parameters (parity off, etc) */ |
| 406 | outb(UART_LCR_WLEN8 /* 8 data-bits */ |
| 407 | | 0 /* 1 stop-bit */ |
| 408 | | 0 /* parity off */ |
| 409 | | 0 /* DLAB = 0 */ |
| 410 | ,uart->base + UART_LCR); /* Line Control Register */ |
| 411 | |
| 412 | switch (uart->adaptor) { |
| 413 | default: |
| 414 | outb(UART_MCR_RTS /* Set Request-To-Send line active */ |
| 415 | | UART_MCR_DTR /* Set Data-Terminal-Ready line active */ |
| 416 | | UART_MCR_OUT2 /* Set OUT2 - not always required, but when |
| 417 | * it is, it is ESSENTIAL for enabling interrupts |
| 418 | */ |
| 419 | ,uart->base + UART_MCR); /* Modem Control Register */ |
| 420 | break; |
| 421 | case SNDRV_SERIAL_MS124W_SA: |
| 422 | case SNDRV_SERIAL_MS124W_MB: |
| 423 | /* MS-124W can draw power from RTS and DTR if they |
| 424 | are in opposite states. */ |
| 425 | outb(UART_MCR_RTS | (0&UART_MCR_DTR) | UART_MCR_OUT2, |
| 426 | uart->base + UART_MCR); |
| 427 | break; |
| 428 | case SNDRV_SERIAL_MS124T: |
| 429 | /* MS-124T can draw power from RTS and/or DTR (preferably |
| 430 | both) if they are both asserted. */ |
| 431 | outb(UART_MCR_RTS | UART_MCR_DTR | UART_MCR_OUT2, |
| 432 | uart->base + UART_MCR); |
| 433 | break; |
| 434 | } |
| 435 | |
| 436 | if (uart->irq < 0) { |
| 437 | byte = (0 & UART_IER_RDI) /* Disable Receiver data interrupt */ |
| 438 | |(0 & UART_IER_THRI) /* Disable Transmitter holding register empty interrupt */ |
| 439 | ; |
| 440 | } else if (uart->adaptor == SNDRV_SERIAL_MS124W_SA) { |
| 441 | byte = UART_IER_RDI /* Enable Receiver data interrupt */ |
| 442 | | UART_IER_MSI /* Enable Modem status interrupt */ |
| 443 | ; |
| 444 | } else if (uart->adaptor == SNDRV_SERIAL_GENERIC) { |
| 445 | byte = UART_IER_RDI /* Enable Receiver data interrupt */ |
| 446 | | UART_IER_MSI /* Enable Modem status interrupt */ |
| 447 | | UART_IER_THRI /* Enable Transmitter holding register empty interrupt */ |
| 448 | ; |
| 449 | } else { |
| 450 | byte = UART_IER_RDI /* Enable Receiver data interrupt */ |
| 451 | | UART_IER_THRI /* Enable Transmitter holding register empty interrupt */ |
| 452 | ; |
| 453 | } |
| 454 | outb(byte, uart->base + UART_IER); /* Interupt enable Register */ |
| 455 | |
| 456 | inb(uart->base + UART_LSR); /* Clear any pre-existing overrun indication */ |
| 457 | inb(uart->base + UART_IIR); /* Clear any pre-existing transmit interrupt */ |
| 458 | inb(uart->base + UART_RX); /* Clear any pre-existing receive interrupt */ |
| 459 | } |
| 460 | |
| 461 | static void snd_uart16550_do_close(snd_uart16550_t * uart) |
| 462 | { |
| 463 | if (uart->irq < 0) |
| 464 | snd_uart16550_del_timer(uart); |
| 465 | |
| 466 | /* NOTE: may need to disable interrupts before de-registering out handler. |
| 467 | * For now, the consequences are harmless. |
| 468 | */ |
| 469 | |
| 470 | outb((0 & UART_IER_RDI) /* Disable Receiver data interrupt */ |
| 471 | |(0 & UART_IER_THRI) /* Disable Transmitter holding register empty interrupt */ |
| 472 | ,uart->base + UART_IER); /* Interupt enable Register */ |
| 473 | |
| 474 | switch (uart->adaptor) { |
| 475 | default: |
| 476 | outb((0 & UART_MCR_RTS) /* Deactivate Request-To-Send line */ |
| 477 | |(0 & UART_MCR_DTR) /* Deactivate Data-Terminal-Ready line */ |
| 478 | |(0 & UART_MCR_OUT2) /* Deactivate OUT2 */ |
| 479 | ,uart->base + UART_MCR); /* Modem Control Register */ |
| 480 | break; |
| 481 | case SNDRV_SERIAL_MS124W_SA: |
| 482 | case SNDRV_SERIAL_MS124W_MB: |
| 483 | /* MS-124W can draw power from RTS and DTR if they |
| 484 | are in opposite states; leave it powered. */ |
| 485 | outb(UART_MCR_RTS | (0&UART_MCR_DTR) | (0&UART_MCR_OUT2), |
| 486 | uart->base + UART_MCR); |
| 487 | break; |
| 488 | case SNDRV_SERIAL_MS124T: |
| 489 | /* MS-124T can draw power from RTS and/or DTR (preferably |
| 490 | both) if they are both asserted; leave it powered. */ |
| 491 | outb(UART_MCR_RTS | UART_MCR_DTR | (0&UART_MCR_OUT2), |
| 492 | uart->base + UART_MCR); |
| 493 | break; |
| 494 | } |
| 495 | |
| 496 | inb(uart->base + UART_IIR); /* Clear any outstanding interrupts */ |
| 497 | |
| 498 | /* Restore old divisor */ |
| 499 | if (uart->divisor != 0) { |
| 500 | outb(UART_LCR_DLAB /* Divisor latch access bit */ |
| 501 | ,uart->base + UART_LCR); /* Line Control Register */ |
| 502 | outb(uart->old_divisor_lsb |
| 503 | ,uart->base + UART_DLL); /* Divisor Latch Low */ |
| 504 | outb(uart->old_divisor_msb |
| 505 | ,uart->base + UART_DLM); /* Divisor Latch High */ |
| 506 | /* Restore old LCR (data bits, stop bits, parity, DLAB) */ |
| 507 | outb(uart->old_line_ctrl_reg |
| 508 | ,uart->base + UART_LCR); /* Line Control Register */ |
| 509 | } |
| 510 | } |
| 511 | |
| 512 | static int snd_uart16550_input_open(snd_rawmidi_substream_t * substream) |
| 513 | { |
| 514 | unsigned long flags; |
| 515 | snd_uart16550_t *uart = substream->rmidi->private_data; |
| 516 | |
| 517 | spin_lock_irqsave(&uart->open_lock, flags); |
| 518 | if (uart->filemode == SERIAL_MODE_NOT_OPENED) |
| 519 | snd_uart16550_do_open(uart); |
| 520 | uart->filemode |= SERIAL_MODE_INPUT_OPEN; |
| 521 | uart->midi_input[substream->number] = substream; |
| 522 | spin_unlock_irqrestore(&uart->open_lock, flags); |
| 523 | return 0; |
| 524 | } |
| 525 | |
| 526 | static int snd_uart16550_input_close(snd_rawmidi_substream_t * substream) |
| 527 | { |
| 528 | unsigned long flags; |
| 529 | snd_uart16550_t *uart = substream->rmidi->private_data; |
| 530 | |
| 531 | spin_lock_irqsave(&uart->open_lock, flags); |
| 532 | uart->filemode &= ~SERIAL_MODE_INPUT_OPEN; |
| 533 | uart->midi_input[substream->number] = NULL; |
| 534 | if (uart->filemode == SERIAL_MODE_NOT_OPENED) |
| 535 | snd_uart16550_do_close(uart); |
| 536 | spin_unlock_irqrestore(&uart->open_lock, flags); |
| 537 | return 0; |
| 538 | } |
| 539 | |
| 540 | static void snd_uart16550_input_trigger(snd_rawmidi_substream_t * substream, int up) |
| 541 | { |
| 542 | unsigned long flags; |
| 543 | snd_uart16550_t *uart = substream->rmidi->private_data; |
| 544 | |
| 545 | spin_lock_irqsave(&uart->open_lock, flags); |
| 546 | if (up) { |
| 547 | uart->filemode |= SERIAL_MODE_INPUT_TRIGGERED; |
| 548 | } else { |
| 549 | uart->filemode &= ~SERIAL_MODE_INPUT_TRIGGERED; |
| 550 | } |
| 551 | spin_unlock_irqrestore(&uart->open_lock, flags); |
| 552 | } |
| 553 | |
| 554 | static int snd_uart16550_output_open(snd_rawmidi_substream_t * substream) |
| 555 | { |
| 556 | unsigned long flags; |
| 557 | snd_uart16550_t *uart = substream->rmidi->private_data; |
| 558 | |
| 559 | spin_lock_irqsave(&uart->open_lock, flags); |
| 560 | if (uart->filemode == SERIAL_MODE_NOT_OPENED) |
| 561 | snd_uart16550_do_open(uart); |
| 562 | uart->filemode |= SERIAL_MODE_OUTPUT_OPEN; |
| 563 | uart->midi_output[substream->number] = substream; |
| 564 | spin_unlock_irqrestore(&uart->open_lock, flags); |
| 565 | return 0; |
| 566 | }; |
| 567 | |
| 568 | static int snd_uart16550_output_close(snd_rawmidi_substream_t * substream) |
| 569 | { |
| 570 | unsigned long flags; |
| 571 | snd_uart16550_t *uart = substream->rmidi->private_data; |
| 572 | |
| 573 | spin_lock_irqsave(&uart->open_lock, flags); |
| 574 | uart->filemode &= ~SERIAL_MODE_OUTPUT_OPEN; |
| 575 | uart->midi_output[substream->number] = NULL; |
| 576 | if (uart->filemode == SERIAL_MODE_NOT_OPENED) |
| 577 | snd_uart16550_do_close(uart); |
| 578 | spin_unlock_irqrestore(&uart->open_lock, flags); |
| 579 | return 0; |
| 580 | }; |
| 581 | |
Jesper Juhl | 77933d7 | 2005-07-27 11:46:09 -0700 | [diff] [blame^] | 582 | static inline int snd_uart16550_buffer_can_write( snd_uart16550_t *uart, int Num ) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | { |
| 584 | if( uart->buff_in_count + Num < TX_BUFF_SIZE ) |
| 585 | return 1; |
| 586 | else |
| 587 | return 0; |
| 588 | } |
| 589 | |
Jesper Juhl | 77933d7 | 2005-07-27 11:46:09 -0700 | [diff] [blame^] | 590 | static inline int snd_uart16550_write_buffer(snd_uart16550_t *uart, unsigned char byte) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 591 | { |
| 592 | unsigned short buff_in = uart->buff_in; |
| 593 | if( uart->buff_in_count < TX_BUFF_SIZE ) { |
| 594 | uart->tx_buff[buff_in] = byte; |
| 595 | buff_in++; |
| 596 | buff_in &= TX_BUFF_MASK; |
| 597 | uart->buff_in = buff_in; |
| 598 | uart->buff_in_count++; |
| 599 | if (uart->irq < 0) /* polling mode */ |
| 600 | snd_uart16550_add_timer(uart); |
| 601 | return 1; |
| 602 | } else |
| 603 | return 0; |
| 604 | } |
| 605 | |
| 606 | static int snd_uart16550_output_byte(snd_uart16550_t *uart, snd_rawmidi_substream_t * substream, unsigned char midi_byte) |
| 607 | { |
| 608 | if (uart->buff_in_count == 0 /* Buffer empty? */ |
| 609 | && ((uart->adaptor != SNDRV_SERIAL_MS124W_SA && |
| 610 | uart->adaptor != SNDRV_SERIAL_GENERIC) || |
| 611 | (uart->fifo_count == 0 /* FIFO empty? */ |
| 612 | && (inb(uart->base + UART_MSR) & UART_MSR_CTS)))) { /* CTS? */ |
| 613 | |
| 614 | /* Tx Buffer Empty - try to write immediately */ |
| 615 | if ((inb(uart->base + UART_LSR) & UART_LSR_THRE) != 0) { |
| 616 | /* Transmitter holding register (and Tx FIFO) empty */ |
| 617 | uart->fifo_count = 1; |
| 618 | outb(midi_byte, uart->base + UART_TX); |
| 619 | } else { |
| 620 | if (uart->fifo_count < uart->fifo_limit) { |
| 621 | uart->fifo_count++; |
| 622 | outb(midi_byte, uart->base + UART_TX); |
| 623 | } else { |
| 624 | /* Cannot write (buffer empty) - put char in buffer */ |
| 625 | snd_uart16550_write_buffer(uart, midi_byte); |
| 626 | } |
| 627 | } |
| 628 | } else { |
| 629 | if( !snd_uart16550_write_buffer(uart, midi_byte) ) { |
| 630 | snd_printk("%s: Buffer overrun on device at 0x%lx\n", |
| 631 | uart->rmidi->name, uart->base); |
| 632 | return 0; |
| 633 | } |
| 634 | } |
| 635 | |
| 636 | return 1; |
| 637 | } |
| 638 | |
| 639 | static void snd_uart16550_output_write(snd_rawmidi_substream_t * substream) |
| 640 | { |
| 641 | unsigned long flags; |
| 642 | unsigned char midi_byte, addr_byte; |
| 643 | snd_uart16550_t *uart = substream->rmidi->private_data; |
| 644 | char first; |
| 645 | static unsigned long lasttime=0; |
| 646 | |
| 647 | /* Interupts are disabled during the updating of the tx_buff, |
| 648 | * since it is 'bad' to have two processes updating the same |
| 649 | * variables (ie buff_in & buff_out) |
| 650 | */ |
| 651 | |
| 652 | spin_lock_irqsave(&uart->open_lock, flags); |
| 653 | |
| 654 | if (uart->irq < 0) //polling |
| 655 | snd_uart16550_io_loop(uart); |
| 656 | |
| 657 | if (uart->adaptor == SNDRV_SERIAL_MS124W_MB) { |
| 658 | while (1) { |
| 659 | /* buffer full? */ |
| 660 | /* in this mode we need two bytes of space */ |
| 661 | if (uart->buff_in_count > TX_BUFF_SIZE - 2) |
| 662 | break; |
| 663 | if (snd_rawmidi_transmit(substream, &midi_byte, 1) != 1) |
| 664 | break; |
| 665 | #ifdef SNDRV_SERIAL_MS124W_MB_NOCOMBO |
| 666 | /* select exactly one of the four ports */ |
| 667 | addr_byte = (1 << (substream->number + 4)) | 0x08; |
| 668 | #else |
| 669 | /* select any combination of the four ports */ |
| 670 | addr_byte = (substream->number << 4) | 0x08; |
| 671 | /* ...except none */ |
| 672 | if (addr_byte == 0x08) addr_byte = 0xf8; |
| 673 | #endif |
| 674 | snd_uart16550_output_byte(uart, substream, addr_byte); |
| 675 | /* send midi byte */ |
| 676 | snd_uart16550_output_byte(uart, substream, midi_byte); |
| 677 | } |
| 678 | } else { |
| 679 | first = 0; |
| 680 | while( 1 == snd_rawmidi_transmit_peek(substream, &midi_byte, 1) ) { |
| 681 | /* Also send F5 after 3 seconds with no data to handle device disconnect */ |
| 682 | if (first == 0 && (uart->adaptor == SNDRV_SERIAL_SOUNDCANVAS || |
| 683 | uart->adaptor == SNDRV_SERIAL_GENERIC) && |
| 684 | (uart->prev_out != substream->number || jiffies-lasttime > 3*HZ)) { |
| 685 | |
| 686 | if( snd_uart16550_buffer_can_write( uart, 3 ) ) { |
| 687 | /* Roland Soundcanvas part selection */ |
| 688 | /* If this substream of the data is different previous |
| 689 | substream in this uart, send the change part event */ |
| 690 | uart->prev_out = substream->number; |
| 691 | /* change part */ |
| 692 | snd_uart16550_output_byte(uart, substream, 0xf5); |
| 693 | /* data */ |
| 694 | snd_uart16550_output_byte(uart, substream, uart->prev_out + 1); |
| 695 | /* If midi_byte is a data byte, send the previous status byte */ |
| 696 | if ((midi_byte < 0x80) && (uart->adaptor == SNDRV_SERIAL_SOUNDCANVAS)) |
| 697 | snd_uart16550_output_byte(uart, substream, uart->prev_status[uart->prev_out]); |
| 698 | } else if( !uart->drop_on_full ) |
| 699 | break; |
| 700 | |
| 701 | } |
| 702 | |
| 703 | /* send midi byte */ |
| 704 | if( !snd_uart16550_output_byte(uart, substream, midi_byte) && !uart->drop_on_full ) |
| 705 | break; |
| 706 | |
| 707 | if (midi_byte >= 0x80 && midi_byte < 0xf0) |
| 708 | uart->prev_status[uart->prev_out] = midi_byte; |
| 709 | first = 1; |
| 710 | |
| 711 | snd_rawmidi_transmit_ack( substream, 1 ); |
| 712 | } |
| 713 | lasttime = jiffies; |
| 714 | } |
| 715 | spin_unlock_irqrestore(&uart->open_lock, flags); |
| 716 | } |
| 717 | |
| 718 | static void snd_uart16550_output_trigger(snd_rawmidi_substream_t * substream, int up) |
| 719 | { |
| 720 | unsigned long flags; |
| 721 | snd_uart16550_t *uart = substream->rmidi->private_data; |
| 722 | |
| 723 | spin_lock_irqsave(&uart->open_lock, flags); |
| 724 | if (up) { |
| 725 | uart->filemode |= SERIAL_MODE_OUTPUT_TRIGGERED; |
| 726 | } else { |
| 727 | uart->filemode &= ~SERIAL_MODE_OUTPUT_TRIGGERED; |
| 728 | } |
| 729 | spin_unlock_irqrestore(&uart->open_lock, flags); |
| 730 | if (up) |
| 731 | snd_uart16550_output_write(substream); |
| 732 | } |
| 733 | |
| 734 | static snd_rawmidi_ops_t snd_uart16550_output = |
| 735 | { |
| 736 | .open = snd_uart16550_output_open, |
| 737 | .close = snd_uart16550_output_close, |
| 738 | .trigger = snd_uart16550_output_trigger, |
| 739 | }; |
| 740 | |
| 741 | static snd_rawmidi_ops_t snd_uart16550_input = |
| 742 | { |
| 743 | .open = snd_uart16550_input_open, |
| 744 | .close = snd_uart16550_input_close, |
| 745 | .trigger = snd_uart16550_input_trigger, |
| 746 | }; |
| 747 | |
| 748 | static int snd_uart16550_free(snd_uart16550_t *uart) |
| 749 | { |
| 750 | if (uart->irq >= 0) |
| 751 | free_irq(uart->irq, (void *)uart); |
| 752 | if (uart->res_base) { |
| 753 | release_resource(uart->res_base); |
| 754 | kfree_nocheck(uart->res_base); |
| 755 | } |
| 756 | kfree(uart); |
| 757 | return 0; |
| 758 | }; |
| 759 | |
| 760 | static int snd_uart16550_dev_free(snd_device_t *device) |
| 761 | { |
| 762 | snd_uart16550_t *uart = device->device_data; |
| 763 | return snd_uart16550_free(uart); |
| 764 | } |
| 765 | |
| 766 | static int __init snd_uart16550_create(snd_card_t * card, |
| 767 | unsigned long iobase, |
| 768 | int irq, |
| 769 | unsigned int speed, |
| 770 | unsigned int base, |
| 771 | int adaptor, |
| 772 | int droponfull, |
| 773 | snd_uart16550_t **ruart) |
| 774 | { |
| 775 | static snd_device_ops_t ops = { |
| 776 | .dev_free = snd_uart16550_dev_free, |
| 777 | }; |
| 778 | snd_uart16550_t *uart; |
| 779 | int err; |
| 780 | |
| 781 | |
| 782 | if ((uart = kcalloc(1, sizeof(*uart), GFP_KERNEL)) == NULL) |
| 783 | return -ENOMEM; |
| 784 | uart->adaptor = adaptor; |
| 785 | uart->card = card; |
| 786 | spin_lock_init(&uart->open_lock); |
| 787 | uart->irq = -1; |
| 788 | uart->base = iobase; |
| 789 | uart->drop_on_full = droponfull; |
| 790 | |
| 791 | if ((err = snd_uart16550_detect(uart)) <= 0) { |
| 792 | printk(KERN_ERR "no UART detected at 0x%lx\n", iobase); |
| 793 | return err; |
| 794 | } |
| 795 | |
| 796 | if (irq >= 0 && irq != SNDRV_AUTO_IRQ) { |
| 797 | if (request_irq(irq, snd_uart16550_interrupt, |
| 798 | SA_INTERRUPT, "Serial MIDI", (void *) uart)) { |
| 799 | snd_printk("irq %d busy. Using Polling.\n", irq); |
| 800 | } else { |
| 801 | uart->irq = irq; |
| 802 | } |
| 803 | } |
| 804 | uart->divisor = base / speed; |
| 805 | uart->speed = base / (unsigned int)uart->divisor; |
| 806 | uart->speed_base = base; |
| 807 | uart->prev_out = -1; |
| 808 | uart->prev_in = 0; |
| 809 | uart->rstatus = 0; |
| 810 | memset(uart->prev_status, 0x80, sizeof(unsigned char) * SNDRV_SERIAL_MAX_OUTS); |
| 811 | init_timer(&uart->buffer_timer); |
| 812 | uart->buffer_timer.function = snd_uart16550_buffer_timer; |
| 813 | uart->buffer_timer.data = (unsigned long)uart; |
| 814 | uart->timer_running = 0; |
| 815 | |
| 816 | /* Register device */ |
| 817 | if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, uart, &ops)) < 0) { |
| 818 | snd_uart16550_free(uart); |
| 819 | return err; |
| 820 | } |
| 821 | |
| 822 | switch (uart->adaptor) { |
| 823 | case SNDRV_SERIAL_MS124W_SA: |
| 824 | case SNDRV_SERIAL_MS124W_MB: |
| 825 | /* MS-124W can draw power from RTS and DTR if they |
| 826 | are in opposite states. */ |
| 827 | outb(UART_MCR_RTS | (0&UART_MCR_DTR), uart->base + UART_MCR); |
| 828 | break; |
| 829 | case SNDRV_SERIAL_MS124T: |
| 830 | /* MS-124T can draw power from RTS and/or DTR (preferably |
| 831 | both) if they are asserted. */ |
| 832 | outb(UART_MCR_RTS | UART_MCR_DTR, uart->base + UART_MCR); |
| 833 | break; |
| 834 | default: |
| 835 | break; |
| 836 | } |
| 837 | |
| 838 | if (ruart) |
| 839 | *ruart = uart; |
| 840 | |
| 841 | return 0; |
| 842 | } |
| 843 | |
| 844 | static void __init snd_uart16550_substreams(snd_rawmidi_str_t *stream) |
| 845 | { |
| 846 | struct list_head *list; |
| 847 | |
| 848 | list_for_each(list, &stream->substreams) { |
| 849 | snd_rawmidi_substream_t *substream = list_entry(list, snd_rawmidi_substream_t, list); |
| 850 | sprintf(substream->name, "Serial MIDI %d", substream->number + 1); |
| 851 | } |
| 852 | } |
| 853 | |
| 854 | static int __init snd_uart16550_rmidi(snd_uart16550_t *uart, int device, int outs, int ins, snd_rawmidi_t **rmidi) |
| 855 | { |
| 856 | snd_rawmidi_t *rrawmidi; |
| 857 | int err; |
| 858 | |
| 859 | if ((err = snd_rawmidi_new(uart->card, "UART Serial MIDI", device, outs, ins, &rrawmidi)) < 0) |
| 860 | return err; |
| 861 | snd_rawmidi_set_ops(rrawmidi, SNDRV_RAWMIDI_STREAM_INPUT, &snd_uart16550_input); |
| 862 | snd_rawmidi_set_ops(rrawmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &snd_uart16550_output); |
| 863 | strcpy(rrawmidi->name, "Serial MIDI"); |
| 864 | snd_uart16550_substreams(&rrawmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]); |
| 865 | snd_uart16550_substreams(&rrawmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]); |
| 866 | rrawmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT | |
| 867 | SNDRV_RAWMIDI_INFO_INPUT | |
| 868 | SNDRV_RAWMIDI_INFO_DUPLEX; |
| 869 | rrawmidi->private_data = uart; |
| 870 | if (rmidi) |
| 871 | *rmidi = rrawmidi; |
| 872 | return 0; |
| 873 | } |
| 874 | |
| 875 | static int __init snd_serial_probe(int dev) |
| 876 | { |
| 877 | snd_card_t *card; |
| 878 | snd_uart16550_t *uart; |
| 879 | int err; |
| 880 | |
| 881 | if (!enable[dev]) |
| 882 | return -ENOENT; |
| 883 | |
| 884 | switch (adaptor[dev]) { |
| 885 | case SNDRV_SERIAL_SOUNDCANVAS: |
| 886 | ins[dev] = 1; |
| 887 | break; |
| 888 | case SNDRV_SERIAL_MS124T: |
| 889 | case SNDRV_SERIAL_MS124W_SA: |
| 890 | outs[dev] = 1; |
| 891 | ins[dev] = 1; |
| 892 | break; |
| 893 | case SNDRV_SERIAL_MS124W_MB: |
| 894 | outs[dev] = 16; |
| 895 | ins[dev] = 1; |
| 896 | break; |
| 897 | case SNDRV_SERIAL_GENERIC: |
| 898 | break; |
| 899 | default: |
| 900 | snd_printk("Adaptor type is out of range 0-%d (%d)\n", |
| 901 | SNDRV_SERIAL_MAX_ADAPTOR, adaptor[dev]); |
| 902 | return -ENODEV; |
| 903 | } |
| 904 | |
| 905 | if (outs[dev] < 1 || outs[dev] > SNDRV_SERIAL_MAX_OUTS) { |
| 906 | snd_printk("Count of outputs is out of range 1-%d (%d)\n", |
| 907 | SNDRV_SERIAL_MAX_OUTS, outs[dev]); |
| 908 | return -ENODEV; |
| 909 | } |
| 910 | |
| 911 | if (ins[dev] < 1 || ins[dev] > SNDRV_SERIAL_MAX_INS) { |
| 912 | snd_printk("Count of inputs is out of range 1-%d (%d)\n", |
| 913 | SNDRV_SERIAL_MAX_INS, ins[dev]); |
| 914 | return -ENODEV; |
| 915 | } |
| 916 | |
| 917 | card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0); |
| 918 | if (card == NULL) |
| 919 | return -ENOMEM; |
| 920 | |
| 921 | strcpy(card->driver, "Serial"); |
| 922 | strcpy(card->shortname, "Serial MIDI (UART16550A)"); |
| 923 | |
| 924 | if ((err = snd_uart16550_create(card, |
| 925 | port[dev], |
| 926 | irq[dev], |
| 927 | speed[dev], |
| 928 | base[dev], |
| 929 | adaptor[dev], |
| 930 | droponfull[dev], |
| 931 | &uart)) < 0) { |
| 932 | snd_card_free(card); |
| 933 | return err; |
| 934 | } |
| 935 | |
| 936 | if ((err = snd_uart16550_rmidi(uart, 0, outs[dev], ins[dev], &uart->rmidi)) < 0) { |
| 937 | snd_card_free(card); |
| 938 | return err; |
| 939 | } |
| 940 | |
| 941 | sprintf(card->longname, "%s at 0x%lx, irq %d speed %d div %d outs %d ins %d adaptor %s droponfull %d", |
| 942 | card->shortname, |
| 943 | uart->base, |
| 944 | uart->irq, |
| 945 | uart->speed, |
| 946 | (int)uart->divisor, |
| 947 | outs[dev], |
| 948 | ins[dev], |
| 949 | adaptor_names[uart->adaptor], |
| 950 | uart->drop_on_full); |
| 951 | |
| 952 | if ((err = snd_card_register(card)) < 0) { |
| 953 | snd_card_free(card); |
| 954 | return err; |
| 955 | } |
| 956 | snd_serial_cards[dev] = card; |
| 957 | return 0; |
| 958 | } |
| 959 | |
| 960 | static int __init alsa_card_serial_init(void) |
| 961 | { |
| 962 | int dev = 0; |
| 963 | int cards = 0; |
| 964 | |
| 965 | for (dev = 0; dev < SNDRV_CARDS; dev++) { |
| 966 | if (snd_serial_probe(dev) == 0) |
| 967 | cards++; |
| 968 | } |
| 969 | |
| 970 | if (cards == 0) { |
| 971 | #ifdef MODULE |
| 972 | printk(KERN_ERR "serial midi soundcard not found or device busy\n"); |
| 973 | #endif |
| 974 | return -ENODEV; |
| 975 | } |
| 976 | return 0; |
| 977 | } |
| 978 | |
| 979 | static void __exit alsa_card_serial_exit(void) |
| 980 | { |
| 981 | int dev; |
| 982 | |
| 983 | for (dev = 0; dev < SNDRV_CARDS; dev++) { |
| 984 | if (snd_serial_cards[dev] != NULL) |
| 985 | snd_card_free(snd_serial_cards[dev]); |
| 986 | } |
| 987 | } |
| 988 | |
| 989 | module_init(alsa_card_serial_init) |
| 990 | module_exit(alsa_card_serial_exit) |