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1da177e4 LT |
1 | /* |
2 | * serial.c | |
c1017a4c | 3 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz>, |
1da177e4 LT |
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 | ||
1da177e4 LT |
33 | #include <linux/init.h> |
34 | #include <linux/interrupt.h> | |
9caf6b59 TI |
35 | #include <linux/err.h> |
36 | #include <linux/platform_device.h> | |
1da177e4 LT |
37 | #include <linux/slab.h> |
38 | #include <linux/ioport.h> | |
39 | #include <linux/moduleparam.h> | |
40 | #include <sound/core.h> | |
41 | #include <sound/rawmidi.h> | |
42 | #include <sound/initval.h> | |
43 | ||
44 | #include <linux/serial_reg.h> | |
f11b7992 | 45 | #include <linux/jiffies.h> |
1da177e4 LT |
46 | |
47 | #include <asm/io.h> | |
48 | ||
49 | MODULE_DESCRIPTION("MIDI serial u16550"); | |
50 | MODULE_LICENSE("GPL"); | |
51 | MODULE_SUPPORTED_DEVICE("{{ALSA, MIDI serial u16550}}"); | |
52 | ||
53 | #define SNDRV_SERIAL_SOUNDCANVAS 0 /* Roland Soundcanvas; F5 NN selects part */ | |
54 | #define SNDRV_SERIAL_MS124T 1 /* Midiator MS-124T */ | |
55 | #define SNDRV_SERIAL_MS124W_SA 2 /* Midiator MS-124W in S/A mode */ | |
56 | #define SNDRV_SERIAL_MS124W_MB 3 /* Midiator MS-124W in M/B mode */ | |
57 | #define SNDRV_SERIAL_GENERIC 4 /* Generic Interface */ | |
58 | #define SNDRV_SERIAL_MAX_ADAPTOR SNDRV_SERIAL_GENERIC | |
59 | static char *adaptor_names[] = { | |
60 | "Soundcanvas", | |
61 | "MS-124T", | |
62 | "MS-124W S/A", | |
63 | "MS-124W M/B", | |
64 | "Generic" | |
65 | }; | |
66 | ||
67 | #define SNDRV_SERIAL_NORMALBUFF 0 /* Normal blocking buffer operation */ | |
68 | #define SNDRV_SERIAL_DROPBUFF 1 /* Non-blocking discard operation */ | |
69 | ||
70 | static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */ | |
71 | static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */ | |
72 | static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE; /* Enable this card */ | |
73 | static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT; /* 0x3f8,0x2f8,0x3e8,0x2e8 */ | |
74 | static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ; /* 3,4,5,7,9,10,11,14,15 */ | |
75 | static int speed[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 38400}; /* 9600,19200,38400,57600,115200 */ | |
76 | static int base[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 115200}; /* baud base */ | |
77 | static int outs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1}; /* 1 to 16 */ | |
78 | static int ins[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1}; /* 1 to 16 */ | |
79 | static int adaptor[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = SNDRV_SERIAL_SOUNDCANVAS}; | |
80 | static int droponfull[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS -1)] = SNDRV_SERIAL_NORMALBUFF }; | |
81 | ||
82 | module_param_array(index, int, NULL, 0444); | |
83 | MODULE_PARM_DESC(index, "Index value for Serial MIDI."); | |
84 | module_param_array(id, charp, NULL, 0444); | |
85 | MODULE_PARM_DESC(id, "ID string for Serial MIDI."); | |
86 | module_param_array(enable, bool, NULL, 0444); | |
87 | MODULE_PARM_DESC(enable, "Enable UART16550A chip."); | |
88 | module_param_array(port, long, NULL, 0444); | |
89 | MODULE_PARM_DESC(port, "Port # for UART16550A chip."); | |
90 | module_param_array(irq, int, NULL, 0444); | |
91 | MODULE_PARM_DESC(irq, "IRQ # for UART16550A chip."); | |
92 | module_param_array(speed, int, NULL, 0444); | |
93 | MODULE_PARM_DESC(speed, "Speed in bauds."); | |
94 | module_param_array(base, int, NULL, 0444); | |
95 | MODULE_PARM_DESC(base, "Base for divisor in bauds."); | |
96 | module_param_array(outs, int, NULL, 0444); | |
97 | MODULE_PARM_DESC(outs, "Number of MIDI outputs."); | |
98 | module_param_array(ins, int, NULL, 0444); | |
99 | MODULE_PARM_DESC(ins, "Number of MIDI inputs."); | |
100 | module_param_array(droponfull, bool, NULL, 0444); | |
101 | MODULE_PARM_DESC(droponfull, "Flag to enable drop-on-full buffer mode"); | |
102 | ||
103 | module_param_array(adaptor, int, NULL, 0444); | |
104 | MODULE_PARM_DESC(adaptor, "Type of adaptor."); | |
105 | ||
106 | /*#define SNDRV_SERIAL_MS124W_MB_NOCOMBO 1*/ /* Address outs as 0-3 instead of bitmap */ | |
107 | ||
108 | #define SNDRV_SERIAL_MAX_OUTS 16 /* max 64, min 16 */ | |
109 | #define SNDRV_SERIAL_MAX_INS 16 /* max 64, min 16 */ | |
110 | ||
111 | #define TX_BUFF_SIZE (1<<15) /* Must be 2^n */ | |
112 | #define TX_BUFF_MASK (TX_BUFF_SIZE - 1) | |
113 | ||
114 | #define SERIAL_MODE_NOT_OPENED (0) | |
115 | #define SERIAL_MODE_INPUT_OPEN (1 << 0) | |
116 | #define SERIAL_MODE_OUTPUT_OPEN (1 << 1) | |
117 | #define SERIAL_MODE_INPUT_TRIGGERED (1 << 2) | |
118 | #define SERIAL_MODE_OUTPUT_TRIGGERED (1 << 3) | |
119 | ||
0b830bac | 120 | struct snd_uart16550 { |
4a4d2cfd TI |
121 | struct snd_card *card; |
122 | struct snd_rawmidi *rmidi; | |
123 | struct snd_rawmidi_substream *midi_output[SNDRV_SERIAL_MAX_OUTS]; | |
124 | struct snd_rawmidi_substream *midi_input[SNDRV_SERIAL_MAX_INS]; | |
1da177e4 | 125 | |
0b830bac | 126 | int filemode; /* open status of file */ |
1da177e4 LT |
127 | |
128 | spinlock_t open_lock; | |
129 | ||
130 | int irq; | |
131 | ||
132 | unsigned long base; | |
133 | struct resource *res_base; | |
134 | ||
135 | unsigned int speed; | |
136 | unsigned int speed_base; | |
137 | unsigned char divisor; | |
138 | ||
139 | unsigned char old_divisor_lsb; | |
140 | unsigned char old_divisor_msb; | |
141 | unsigned char old_line_ctrl_reg; | |
142 | ||
0b830bac TI |
143 | /* parameter for using of write loop */ |
144 | short int fifo_limit; /* used in uart16550 */ | |
145 | short int fifo_count; /* used in uart16550 */ | |
1da177e4 | 146 | |
0b830bac | 147 | /* type of adaptor */ |
1da177e4 LT |
148 | int adaptor; |
149 | ||
0b830bac | 150 | /* inputs */ |
1da177e4 LT |
151 | int prev_in; |
152 | unsigned char rstatus; | |
153 | ||
0b830bac | 154 | /* outputs */ |
1da177e4 LT |
155 | int prev_out; |
156 | unsigned char prev_status[SNDRV_SERIAL_MAX_OUTS]; | |
157 | ||
0b830bac | 158 | /* write buffer and its writing/reading position */ |
1da177e4 LT |
159 | unsigned char tx_buff[TX_BUFF_SIZE]; |
160 | int buff_in_count; | |
161 | int buff_in; | |
162 | int buff_out; | |
163 | int drop_on_full; | |
164 | ||
0b830bac | 165 | /* wait timer */ |
1da177e4 LT |
166 | unsigned int timer_running:1; |
167 | struct timer_list buffer_timer; | |
168 | ||
0b830bac | 169 | }; |
1da177e4 | 170 | |
f7a9275d CL |
171 | static struct platform_device *devices[SNDRV_CARDS]; |
172 | ||
0b830bac | 173 | static inline void snd_uart16550_add_timer(struct snd_uart16550 *uart) |
1da177e4 | 174 | { |
0b830bac | 175 | if (!uart->timer_running) { |
1da177e4 LT |
176 | /* timer 38600bps * 10bit * 16byte */ |
177 | uart->buffer_timer.expires = jiffies + (HZ+255)/256; | |
178 | uart->timer_running = 1; | |
179 | add_timer(&uart->buffer_timer); | |
180 | } | |
181 | } | |
182 | ||
0b830bac | 183 | static inline void snd_uart16550_del_timer(struct snd_uart16550 *uart) |
1da177e4 LT |
184 | { |
185 | if (uart->timer_running) { | |
186 | del_timer(&uart->buffer_timer); | |
187 | uart->timer_running = 0; | |
188 | } | |
189 | } | |
190 | ||
191 | /* This macro is only used in snd_uart16550_io_loop */ | |
0b830bac | 192 | static inline void snd_uart16550_buffer_output(struct snd_uart16550 *uart) |
1da177e4 LT |
193 | { |
194 | unsigned short buff_out = uart->buff_out; | |
0b830bac | 195 | if (uart->buff_in_count > 0) { |
1da177e4 LT |
196 | outb(uart->tx_buff[buff_out], uart->base + UART_TX); |
197 | uart->fifo_count++; | |
198 | buff_out++; | |
199 | buff_out &= TX_BUFF_MASK; | |
200 | uart->buff_out = buff_out; | |
201 | uart->buff_in_count--; | |
202 | } | |
203 | } | |
204 | ||
205 | /* This loop should be called with interrupts disabled | |
206 | * We don't want to interrupt this, | |
207 | * as we're already handling an interrupt | |
208 | */ | |
0b830bac | 209 | static void snd_uart16550_io_loop(struct snd_uart16550 * uart) |
1da177e4 LT |
210 | { |
211 | unsigned char c, status; | |
212 | int substream; | |
213 | ||
214 | /* recall previous stream */ | |
215 | substream = uart->prev_in; | |
216 | ||
217 | /* Read Loop */ | |
218 | while ((status = inb(uart->base + UART_LSR)) & UART_LSR_DR) { | |
219 | /* while receive data ready */ | |
220 | c = inb(uart->base + UART_RX); | |
221 | ||
222 | /* keep track of last status byte */ | |
0b830bac | 223 | if (c & 0x80) |
1da177e4 | 224 | uart->rstatus = c; |
1da177e4 LT |
225 | |
226 | /* handle stream switch */ | |
227 | if (uart->adaptor == SNDRV_SERIAL_GENERIC) { | |
228 | if (uart->rstatus == 0xf5) { | |
229 | if (c <= SNDRV_SERIAL_MAX_INS && c > 0) | |
230 | substream = c - 1; | |
231 | if (c != 0xf5) | |
0b830bac TI |
232 | /* prevent future bytes from being |
233 | interpreted as streams */ | |
234 | uart->rstatus = 0; | |
235 | } else if ((uart->filemode & SERIAL_MODE_INPUT_OPEN) | |
236 | && uart->midi_input[substream]) | |
237 | snd_rawmidi_receive(uart->midi_input[substream], | |
238 | &c, 1); | |
239 | } else if ((uart->filemode & SERIAL_MODE_INPUT_OPEN) && | |
240 | uart->midi_input[substream]) | |
1da177e4 | 241 | snd_rawmidi_receive(uart->midi_input[substream], &c, 1); |
1da177e4 LT |
242 | |
243 | if (status & UART_LSR_OE) | |
244 | snd_printk("%s: Overrun on device at 0x%lx\n", | |
245 | uart->rmidi->name, uart->base); | |
246 | } | |
247 | ||
248 | /* remember the last stream */ | |
249 | uart->prev_in = substream; | |
250 | ||
251 | /* no need of check SERIAL_MODE_OUTPUT_OPEN because if not, | |
252 | buffer is never filled. */ | |
253 | /* Check write status */ | |
0b830bac | 254 | if (status & UART_LSR_THRE) |
1da177e4 | 255 | uart->fifo_count = 0; |
1da177e4 LT |
256 | if (uart->adaptor == SNDRV_SERIAL_MS124W_SA |
257 | || uart->adaptor == SNDRV_SERIAL_GENERIC) { | |
258 | /* Can't use FIFO, must send only when CTS is true */ | |
259 | status = inb(uart->base + UART_MSR); | |
0b830bac TI |
260 | while (uart->fifo_count == 0 && (status & UART_MSR_CTS) && |
261 | uart->buff_in_count > 0) { | |
1da177e4 | 262 | snd_uart16550_buffer_output(uart); |
0b830bac | 263 | status = inb(uart->base + UART_MSR); |
1da177e4 LT |
264 | } |
265 | } else { | |
266 | /* Write loop */ | |
0b830bac | 267 | while (uart->fifo_count < uart->fifo_limit /* Can we write ? */ |
1da177e4 LT |
268 | && uart->buff_in_count > 0) /* Do we want to? */ |
269 | snd_uart16550_buffer_output(uart); | |
270 | } | |
271 | if (uart->irq < 0 && uart->buff_in_count > 0) | |
272 | snd_uart16550_add_timer(uart); | |
273 | } | |
274 | ||
275 | /* NOTES ON SERVICING INTERUPTS | |
276 | * --------------------------- | |
277 | * After receiving a interrupt, it is important to indicate to the UART that | |
278 | * this has been done. | |
279 | * For a Rx interrupt, this is done by reading the received byte. | |
280 | * For a Tx interrupt this is done by either: | |
281 | * a) Writing a byte | |
282 | * b) Reading the IIR | |
283 | * It is particularly important to read the IIR if a Tx interrupt is received | |
284 | * when there is no data in tx_buff[], as in this case there no other | |
285 | * indication that the interrupt has been serviced, and it remains outstanding | |
286 | * indefinitely. This has the curious side effect that and no further interrupts | |
287 | * will be generated from this device AT ALL!!. | |
288 | * It is also desirable to clear outstanding interrupts when the device is | |
289 | * opened/closed. | |
290 | * | |
291 | * | |
292 | * Note that some devices need OUT2 to be set before they will generate | |
293 | * interrupts at all. (Possibly tied to an internal pull-up on CTS?) | |
294 | */ | |
7d12e780 | 295 | static irqreturn_t snd_uart16550_interrupt(int irq, void *dev_id) |
1da177e4 | 296 | { |
0b830bac | 297 | struct snd_uart16550 *uart; |
1da177e4 | 298 | |
0b830bac | 299 | uart = dev_id; |
1da177e4 LT |
300 | spin_lock(&uart->open_lock); |
301 | if (uart->filemode == SERIAL_MODE_NOT_OPENED) { | |
302 | spin_unlock(&uart->open_lock); | |
303 | return IRQ_NONE; | |
304 | } | |
0b830bac TI |
305 | /* indicate to the UART that the interrupt has been serviced */ |
306 | inb(uart->base + UART_IIR); | |
1da177e4 LT |
307 | snd_uart16550_io_loop(uart); |
308 | spin_unlock(&uart->open_lock); | |
309 | return IRQ_HANDLED; | |
310 | } | |
311 | ||
312 | /* When the polling mode, this function calls snd_uart16550_io_loop. */ | |
313 | static void snd_uart16550_buffer_timer(unsigned long data) | |
314 | { | |
315 | unsigned long flags; | |
0b830bac | 316 | struct snd_uart16550 *uart; |
1da177e4 | 317 | |
0b830bac | 318 | uart = (struct snd_uart16550 *)data; |
1da177e4 LT |
319 | spin_lock_irqsave(&uart->open_lock, flags); |
320 | snd_uart16550_del_timer(uart); | |
321 | snd_uart16550_io_loop(uart); | |
322 | spin_unlock_irqrestore(&uart->open_lock, flags); | |
323 | } | |
324 | ||
325 | /* | |
326 | * this method probes, if an uart sits on given port | |
327 | * return 0 if found | |
328 | * return negative error if not found | |
329 | */ | |
788c6043 | 330 | static int __devinit snd_uart16550_detect(struct snd_uart16550 *uart) |
1da177e4 LT |
331 | { |
332 | unsigned long io_base = uart->base; | |
333 | int ok; | |
334 | unsigned char c; | |
335 | ||
336 | /* Do some vague tests for the presence of the uart */ | |
337 | if (io_base == 0 || io_base == SNDRV_AUTO_PORT) { | |
338 | return -ENODEV; /* Not configured */ | |
339 | } | |
340 | ||
341 | uart->res_base = request_region(io_base, 8, "Serial MIDI"); | |
342 | if (uart->res_base == NULL) { | |
343 | snd_printk(KERN_ERR "u16550: can't grab port 0x%lx\n", io_base); | |
344 | return -EBUSY; | |
345 | } | |
346 | ||
0b830bac TI |
347 | /* uart detected unless one of the following tests should fail */ |
348 | ok = 1; | |
1da177e4 LT |
349 | /* 8 data-bits, 1 stop-bit, parity off, DLAB = 0 */ |
350 | outb(UART_LCR_WLEN8, io_base + UART_LCR); /* Line Control Register */ | |
351 | c = inb(io_base + UART_IER); | |
352 | /* The top four bits of the IER should always == 0 */ | |
353 | if ((c & 0xf0) != 0) | |
354 | ok = 0; /* failed */ | |
355 | ||
356 | outb(0xaa, io_base + UART_SCR); | |
357 | /* Write arbitrary data into the scratch reg */ | |
358 | c = inb(io_base + UART_SCR); | |
359 | /* If it comes back, it's OK */ | |
360 | if (c != 0xaa) | |
361 | ok = 0; /* failed */ | |
362 | ||
363 | outb(0x55, io_base + UART_SCR); | |
364 | /* Write arbitrary data into the scratch reg */ | |
365 | c = inb(io_base + UART_SCR); | |
366 | /* If it comes back, it's OK */ | |
367 | if (c != 0x55) | |
368 | ok = 0; /* failed */ | |
369 | ||
370 | return ok; | |
371 | } | |
372 | ||
0b830bac | 373 | static void snd_uart16550_do_open(struct snd_uart16550 * uart) |
1da177e4 LT |
374 | { |
375 | char byte; | |
376 | ||
377 | /* Initialize basic variables */ | |
378 | uart->buff_in_count = 0; | |
379 | uart->buff_in = 0; | |
380 | uart->buff_out = 0; | |
381 | uart->fifo_limit = 1; | |
382 | uart->fifo_count = 0; | |
383 | uart->timer_running = 0; | |
384 | ||
385 | outb(UART_FCR_ENABLE_FIFO /* Enable FIFO's (if available) */ | |
386 | | UART_FCR_CLEAR_RCVR /* Clear receiver FIFO */ | |
387 | | UART_FCR_CLEAR_XMIT /* Clear transmitter FIFO */ | |
388 | | UART_FCR_TRIGGER_4 /* Set FIFO trigger at 4-bytes */ | |
389 | /* NOTE: interrupt generated after T=(time)4-bytes | |
390 | * if less than UART_FCR_TRIGGER bytes received | |
391 | */ | |
392 | ,uart->base + UART_FCR); /* FIFO Control Register */ | |
393 | ||
394 | if ((inb(uart->base + UART_IIR) & 0xf0) == 0xc0) | |
395 | uart->fifo_limit = 16; | |
396 | if (uart->divisor != 0) { | |
397 | uart->old_line_ctrl_reg = inb(uart->base + UART_LCR); | |
398 | outb(UART_LCR_DLAB /* Divisor latch access bit */ | |
399 | ,uart->base + UART_LCR); /* Line Control Register */ | |
400 | uart->old_divisor_lsb = inb(uart->base + UART_DLL); | |
401 | uart->old_divisor_msb = inb(uart->base + UART_DLM); | |
402 | ||
403 | outb(uart->divisor | |
404 | ,uart->base + UART_DLL); /* Divisor Latch Low */ | |
405 | outb(0 | |
406 | ,uart->base + UART_DLM); /* Divisor Latch High */ | |
407 | /* DLAB is reset to 0 in next outb() */ | |
408 | } | |
409 | /* Set serial parameters (parity off, etc) */ | |
410 | outb(UART_LCR_WLEN8 /* 8 data-bits */ | |
411 | | 0 /* 1 stop-bit */ | |
412 | | 0 /* parity off */ | |
413 | | 0 /* DLAB = 0 */ | |
414 | ,uart->base + UART_LCR); /* Line Control Register */ | |
415 | ||
416 | switch (uart->adaptor) { | |
417 | default: | |
418 | outb(UART_MCR_RTS /* Set Request-To-Send line active */ | |
419 | | UART_MCR_DTR /* Set Data-Terminal-Ready line active */ | |
420 | | UART_MCR_OUT2 /* Set OUT2 - not always required, but when | |
421 | * it is, it is ESSENTIAL for enabling interrupts | |
422 | */ | |
423 | ,uart->base + UART_MCR); /* Modem Control Register */ | |
424 | break; | |
425 | case SNDRV_SERIAL_MS124W_SA: | |
426 | case SNDRV_SERIAL_MS124W_MB: | |
427 | /* MS-124W can draw power from RTS and DTR if they | |
428 | are in opposite states. */ | |
429 | outb(UART_MCR_RTS | (0&UART_MCR_DTR) | UART_MCR_OUT2, | |
430 | uart->base + UART_MCR); | |
431 | break; | |
432 | case SNDRV_SERIAL_MS124T: | |
433 | /* MS-124T can draw power from RTS and/or DTR (preferably | |
434 | both) if they are both asserted. */ | |
435 | outb(UART_MCR_RTS | UART_MCR_DTR | UART_MCR_OUT2, | |
436 | uart->base + UART_MCR); | |
437 | break; | |
438 | } | |
439 | ||
440 | if (uart->irq < 0) { | |
441 | byte = (0 & UART_IER_RDI) /* Disable Receiver data interrupt */ | |
442 | |(0 & UART_IER_THRI) /* Disable Transmitter holding register empty interrupt */ | |
443 | ; | |
444 | } else if (uart->adaptor == SNDRV_SERIAL_MS124W_SA) { | |
445 | byte = UART_IER_RDI /* Enable Receiver data interrupt */ | |
446 | | UART_IER_MSI /* Enable Modem status interrupt */ | |
447 | ; | |
448 | } else if (uart->adaptor == SNDRV_SERIAL_GENERIC) { | |
449 | byte = UART_IER_RDI /* Enable Receiver data interrupt */ | |
450 | | UART_IER_MSI /* Enable Modem status interrupt */ | |
451 | | UART_IER_THRI /* Enable Transmitter holding register empty interrupt */ | |
452 | ; | |
453 | } else { | |
454 | byte = UART_IER_RDI /* Enable Receiver data interrupt */ | |
455 | | UART_IER_THRI /* Enable Transmitter holding register empty interrupt */ | |
456 | ; | |
457 | } | |
561de31a | 458 | outb(byte, uart->base + UART_IER); /* Interrupt enable Register */ |
1da177e4 LT |
459 | |
460 | inb(uart->base + UART_LSR); /* Clear any pre-existing overrun indication */ | |
461 | inb(uart->base + UART_IIR); /* Clear any pre-existing transmit interrupt */ | |
462 | inb(uart->base + UART_RX); /* Clear any pre-existing receive interrupt */ | |
463 | } | |
464 | ||
0b830bac | 465 | static void snd_uart16550_do_close(struct snd_uart16550 * uart) |
1da177e4 LT |
466 | { |
467 | if (uart->irq < 0) | |
468 | snd_uart16550_del_timer(uart); | |
469 | ||
470 | /* NOTE: may need to disable interrupts before de-registering out handler. | |
471 | * For now, the consequences are harmless. | |
472 | */ | |
473 | ||
474 | outb((0 & UART_IER_RDI) /* Disable Receiver data interrupt */ | |
475 | |(0 & UART_IER_THRI) /* Disable Transmitter holding register empty interrupt */ | |
561de31a | 476 | ,uart->base + UART_IER); /* Interrupt enable Register */ |
1da177e4 LT |
477 | |
478 | switch (uart->adaptor) { | |
479 | default: | |
480 | outb((0 & UART_MCR_RTS) /* Deactivate Request-To-Send line */ | |
481 | |(0 & UART_MCR_DTR) /* Deactivate Data-Terminal-Ready line */ | |
482 | |(0 & UART_MCR_OUT2) /* Deactivate OUT2 */ | |
483 | ,uart->base + UART_MCR); /* Modem Control Register */ | |
484 | break; | |
485 | case SNDRV_SERIAL_MS124W_SA: | |
486 | case SNDRV_SERIAL_MS124W_MB: | |
487 | /* MS-124W can draw power from RTS and DTR if they | |
488 | are in opposite states; leave it powered. */ | |
489 | outb(UART_MCR_RTS | (0&UART_MCR_DTR) | (0&UART_MCR_OUT2), | |
490 | uart->base + UART_MCR); | |
491 | break; | |
492 | case SNDRV_SERIAL_MS124T: | |
493 | /* MS-124T can draw power from RTS and/or DTR (preferably | |
494 | both) if they are both asserted; leave it powered. */ | |
495 | outb(UART_MCR_RTS | UART_MCR_DTR | (0&UART_MCR_OUT2), | |
496 | uart->base + UART_MCR); | |
497 | break; | |
498 | } | |
499 | ||
500 | inb(uart->base + UART_IIR); /* Clear any outstanding interrupts */ | |
501 | ||
502 | /* Restore old divisor */ | |
503 | if (uart->divisor != 0) { | |
504 | outb(UART_LCR_DLAB /* Divisor latch access bit */ | |
505 | ,uart->base + UART_LCR); /* Line Control Register */ | |
506 | outb(uart->old_divisor_lsb | |
507 | ,uart->base + UART_DLL); /* Divisor Latch Low */ | |
508 | outb(uart->old_divisor_msb | |
509 | ,uart->base + UART_DLM); /* Divisor Latch High */ | |
510 | /* Restore old LCR (data bits, stop bits, parity, DLAB) */ | |
511 | outb(uart->old_line_ctrl_reg | |
512 | ,uart->base + UART_LCR); /* Line Control Register */ | |
513 | } | |
514 | } | |
515 | ||
4a4d2cfd | 516 | static int snd_uart16550_input_open(struct snd_rawmidi_substream *substream) |
1da177e4 LT |
517 | { |
518 | unsigned long flags; | |
0b830bac | 519 | struct snd_uart16550 *uart = substream->rmidi->private_data; |
1da177e4 LT |
520 | |
521 | spin_lock_irqsave(&uart->open_lock, flags); | |
522 | if (uart->filemode == SERIAL_MODE_NOT_OPENED) | |
523 | snd_uart16550_do_open(uart); | |
524 | uart->filemode |= SERIAL_MODE_INPUT_OPEN; | |
525 | uart->midi_input[substream->number] = substream; | |
526 | spin_unlock_irqrestore(&uart->open_lock, flags); | |
527 | return 0; | |
528 | } | |
529 | ||
4a4d2cfd | 530 | static int snd_uart16550_input_close(struct snd_rawmidi_substream *substream) |
1da177e4 LT |
531 | { |
532 | unsigned long flags; | |
0b830bac | 533 | struct snd_uart16550 *uart = substream->rmidi->private_data; |
1da177e4 LT |
534 | |
535 | spin_lock_irqsave(&uart->open_lock, flags); | |
536 | uart->filemode &= ~SERIAL_MODE_INPUT_OPEN; | |
537 | uart->midi_input[substream->number] = NULL; | |
538 | if (uart->filemode == SERIAL_MODE_NOT_OPENED) | |
539 | snd_uart16550_do_close(uart); | |
540 | spin_unlock_irqrestore(&uart->open_lock, flags); | |
541 | return 0; | |
542 | } | |
543 | ||
0b830bac TI |
544 | static void snd_uart16550_input_trigger(struct snd_rawmidi_substream *substream, |
545 | int up) | |
1da177e4 LT |
546 | { |
547 | unsigned long flags; | |
0b830bac | 548 | struct snd_uart16550 *uart = substream->rmidi->private_data; |
1da177e4 LT |
549 | |
550 | spin_lock_irqsave(&uart->open_lock, flags); | |
0b830bac | 551 | if (up) |
1da177e4 | 552 | uart->filemode |= SERIAL_MODE_INPUT_TRIGGERED; |
0b830bac | 553 | else |
1da177e4 | 554 | uart->filemode &= ~SERIAL_MODE_INPUT_TRIGGERED; |
1da177e4 LT |
555 | spin_unlock_irqrestore(&uart->open_lock, flags); |
556 | } | |
557 | ||
4a4d2cfd | 558 | static int snd_uart16550_output_open(struct snd_rawmidi_substream *substream) |
1da177e4 LT |
559 | { |
560 | unsigned long flags; | |
0b830bac | 561 | struct snd_uart16550 *uart = substream->rmidi->private_data; |
1da177e4 LT |
562 | |
563 | spin_lock_irqsave(&uart->open_lock, flags); | |
564 | if (uart->filemode == SERIAL_MODE_NOT_OPENED) | |
565 | snd_uart16550_do_open(uart); | |
566 | uart->filemode |= SERIAL_MODE_OUTPUT_OPEN; | |
567 | uart->midi_output[substream->number] = substream; | |
568 | spin_unlock_irqrestore(&uart->open_lock, flags); | |
569 | return 0; | |
570 | }; | |
571 | ||
4a4d2cfd | 572 | static int snd_uart16550_output_close(struct snd_rawmidi_substream *substream) |
1da177e4 LT |
573 | { |
574 | unsigned long flags; | |
0b830bac | 575 | struct snd_uart16550 *uart = substream->rmidi->private_data; |
1da177e4 LT |
576 | |
577 | spin_lock_irqsave(&uart->open_lock, flags); | |
578 | uart->filemode &= ~SERIAL_MODE_OUTPUT_OPEN; | |
579 | uart->midi_output[substream->number] = NULL; | |
580 | if (uart->filemode == SERIAL_MODE_NOT_OPENED) | |
581 | snd_uart16550_do_close(uart); | |
582 | spin_unlock_irqrestore(&uart->open_lock, flags); | |
583 | return 0; | |
584 | }; | |
585 | ||
0b830bac TI |
586 | static inline int snd_uart16550_buffer_can_write(struct snd_uart16550 *uart, |
587 | int Num) | |
1da177e4 | 588 | { |
0b830bac | 589 | if (uart->buff_in_count + Num < TX_BUFF_SIZE) |
1da177e4 LT |
590 | return 1; |
591 | else | |
592 | return 0; | |
593 | } | |
594 | ||
0b830bac TI |
595 | static inline int snd_uart16550_write_buffer(struct snd_uart16550 *uart, |
596 | unsigned char byte) | |
1da177e4 LT |
597 | { |
598 | unsigned short buff_in = uart->buff_in; | |
0b830bac | 599 | if (uart->buff_in_count < TX_BUFF_SIZE) { |
1da177e4 LT |
600 | uart->tx_buff[buff_in] = byte; |
601 | buff_in++; | |
602 | buff_in &= TX_BUFF_MASK; | |
603 | uart->buff_in = buff_in; | |
604 | uart->buff_in_count++; | |
605 | if (uart->irq < 0) /* polling mode */ | |
606 | snd_uart16550_add_timer(uart); | |
607 | return 1; | |
608 | } else | |
609 | return 0; | |
610 | } | |
611 | ||
0b830bac TI |
612 | static int snd_uart16550_output_byte(struct snd_uart16550 *uart, |
613 | struct snd_rawmidi_substream *substream, | |
614 | unsigned char midi_byte) | |
1da177e4 | 615 | { |
0b830bac | 616 | if (uart->buff_in_count == 0 /* Buffer empty? */ |
1da177e4 LT |
617 | && ((uart->adaptor != SNDRV_SERIAL_MS124W_SA && |
618 | uart->adaptor != SNDRV_SERIAL_GENERIC) || | |
0b830bac | 619 | (uart->fifo_count == 0 /* FIFO empty? */ |
1da177e4 LT |
620 | && (inb(uart->base + UART_MSR) & UART_MSR_CTS)))) { /* CTS? */ |
621 | ||
622 | /* Tx Buffer Empty - try to write immediately */ | |
623 | if ((inb(uart->base + UART_LSR) & UART_LSR_THRE) != 0) { | |
624 | /* Transmitter holding register (and Tx FIFO) empty */ | |
625 | uart->fifo_count = 1; | |
626 | outb(midi_byte, uart->base + UART_TX); | |
627 | } else { | |
628 | if (uart->fifo_count < uart->fifo_limit) { | |
629 | uart->fifo_count++; | |
630 | outb(midi_byte, uart->base + UART_TX); | |
631 | } else { | |
0b830bac TI |
632 | /* Cannot write (buffer empty) - |
633 | * put char in buffer */ | |
1da177e4 LT |
634 | snd_uart16550_write_buffer(uart, midi_byte); |
635 | } | |
636 | } | |
637 | } else { | |
0b830bac | 638 | if (!snd_uart16550_write_buffer(uart, midi_byte)) { |
1da177e4 LT |
639 | snd_printk("%s: Buffer overrun on device at 0x%lx\n", |
640 | uart->rmidi->name, uart->base); | |
641 | return 0; | |
642 | } | |
643 | } | |
644 | ||
645 | return 1; | |
646 | } | |
647 | ||
4a4d2cfd | 648 | static void snd_uart16550_output_write(struct snd_rawmidi_substream *substream) |
1da177e4 LT |
649 | { |
650 | unsigned long flags; | |
651 | unsigned char midi_byte, addr_byte; | |
0b830bac | 652 | struct snd_uart16550 *uart = substream->rmidi->private_data; |
1da177e4 | 653 | char first; |
0b830bac | 654 | static unsigned long lasttime = 0; |
1da177e4 | 655 | |
561de31a | 656 | /* Interrupts are disabled during the updating of the tx_buff, |
1da177e4 LT |
657 | * since it is 'bad' to have two processes updating the same |
658 | * variables (ie buff_in & buff_out) | |
659 | */ | |
660 | ||
661 | spin_lock_irqsave(&uart->open_lock, flags); | |
662 | ||
0b830bac | 663 | if (uart->irq < 0) /* polling */ |
1da177e4 LT |
664 | snd_uart16550_io_loop(uart); |
665 | ||
666 | if (uart->adaptor == SNDRV_SERIAL_MS124W_MB) { | |
667 | while (1) { | |
668 | /* buffer full? */ | |
669 | /* in this mode we need two bytes of space */ | |
670 | if (uart->buff_in_count > TX_BUFF_SIZE - 2) | |
671 | break; | |
672 | if (snd_rawmidi_transmit(substream, &midi_byte, 1) != 1) | |
673 | break; | |
674 | #ifdef SNDRV_SERIAL_MS124W_MB_NOCOMBO | |
675 | /* select exactly one of the four ports */ | |
676 | addr_byte = (1 << (substream->number + 4)) | 0x08; | |
677 | #else | |
678 | /* select any combination of the four ports */ | |
679 | addr_byte = (substream->number << 4) | 0x08; | |
680 | /* ...except none */ | |
0b830bac TI |
681 | if (addr_byte == 0x08) |
682 | addr_byte = 0xf8; | |
1da177e4 LT |
683 | #endif |
684 | snd_uart16550_output_byte(uart, substream, addr_byte); | |
685 | /* send midi byte */ | |
686 | snd_uart16550_output_byte(uart, substream, midi_byte); | |
687 | } | |
688 | } else { | |
689 | first = 0; | |
0b830bac TI |
690 | while (snd_rawmidi_transmit_peek(substream, &midi_byte, 1) == 1) { |
691 | /* Also send F5 after 3 seconds with no data | |
692 | * to handle device disconnect */ | |
693 | if (first == 0 && | |
694 | (uart->adaptor == SNDRV_SERIAL_SOUNDCANVAS || | |
695 | uart->adaptor == SNDRV_SERIAL_GENERIC) && | |
696 | (uart->prev_out != substream->number || | |
f11b7992 | 697 | time_after(jiffies, lasttime + 3*HZ))) { |
0b830bac TI |
698 | |
699 | if (snd_uart16550_buffer_can_write(uart, 3)) { | |
1da177e4 | 700 | /* Roland Soundcanvas part selection */ |
0b830bac TI |
701 | /* If this substream of the data is |
702 | * different previous substream | |
703 | * in this uart, send the change part | |
704 | * event | |
705 | */ | |
1da177e4 LT |
706 | uart->prev_out = substream->number; |
707 | /* change part */ | |
0b830bac TI |
708 | snd_uart16550_output_byte(uart, substream, |
709 | 0xf5); | |
1da177e4 | 710 | /* data */ |
0b830bac TI |
711 | snd_uart16550_output_byte(uart, substream, |
712 | uart->prev_out + 1); | |
713 | /* If midi_byte is a data byte, | |
714 | * send the previous status byte */ | |
715 | if (midi_byte < 0x80 && | |
716 | uart->adaptor == SNDRV_SERIAL_SOUNDCANVAS) | |
1da177e4 | 717 | snd_uart16550_output_byte(uart, substream, uart->prev_status[uart->prev_out]); |
0b830bac | 718 | } else if (!uart->drop_on_full) |
1da177e4 LT |
719 | break; |
720 | ||
721 | } | |
722 | ||
723 | /* send midi byte */ | |
0b830bac TI |
724 | if (!snd_uart16550_output_byte(uart, substream, midi_byte) && |
725 | !uart->drop_on_full ) | |
1da177e4 LT |
726 | break; |
727 | ||
728 | if (midi_byte >= 0x80 && midi_byte < 0xf0) | |
729 | uart->prev_status[uart->prev_out] = midi_byte; | |
730 | first = 1; | |
731 | ||
732 | snd_rawmidi_transmit_ack( substream, 1 ); | |
733 | } | |
734 | lasttime = jiffies; | |
735 | } | |
736 | spin_unlock_irqrestore(&uart->open_lock, flags); | |
737 | } | |
738 | ||
0b830bac TI |
739 | static void snd_uart16550_output_trigger(struct snd_rawmidi_substream *substream, |
740 | int up) | |
1da177e4 LT |
741 | { |
742 | unsigned long flags; | |
0b830bac | 743 | struct snd_uart16550 *uart = substream->rmidi->private_data; |
1da177e4 LT |
744 | |
745 | spin_lock_irqsave(&uart->open_lock, flags); | |
0b830bac | 746 | if (up) |
1da177e4 | 747 | uart->filemode |= SERIAL_MODE_OUTPUT_TRIGGERED; |
0b830bac | 748 | else |
1da177e4 | 749 | uart->filemode &= ~SERIAL_MODE_OUTPUT_TRIGGERED; |
1da177e4 LT |
750 | spin_unlock_irqrestore(&uart->open_lock, flags); |
751 | if (up) | |
752 | snd_uart16550_output_write(substream); | |
753 | } | |
754 | ||
4a4d2cfd | 755 | static struct snd_rawmidi_ops snd_uart16550_output = |
1da177e4 LT |
756 | { |
757 | .open = snd_uart16550_output_open, | |
758 | .close = snd_uart16550_output_close, | |
759 | .trigger = snd_uart16550_output_trigger, | |
760 | }; | |
761 | ||
4a4d2cfd | 762 | static struct snd_rawmidi_ops snd_uart16550_input = |
1da177e4 LT |
763 | { |
764 | .open = snd_uart16550_input_open, | |
765 | .close = snd_uart16550_input_close, | |
766 | .trigger = snd_uart16550_input_trigger, | |
767 | }; | |
768 | ||
0b830bac | 769 | static int snd_uart16550_free(struct snd_uart16550 *uart) |
1da177e4 LT |
770 | { |
771 | if (uart->irq >= 0) | |
0b830bac | 772 | free_irq(uart->irq, uart); |
b1d5776d | 773 | release_and_free_resource(uart->res_base); |
1da177e4 LT |
774 | kfree(uart); |
775 | return 0; | |
776 | }; | |
777 | ||
4a4d2cfd | 778 | static int snd_uart16550_dev_free(struct snd_device *device) |
1da177e4 | 779 | { |
0b830bac | 780 | struct snd_uart16550 *uart = device->device_data; |
1da177e4 LT |
781 | return snd_uart16550_free(uart); |
782 | } | |
783 | ||
788c6043 | 784 | static int __devinit snd_uart16550_create(struct snd_card *card, |
1da177e4 LT |
785 | unsigned long iobase, |
786 | int irq, | |
787 | unsigned int speed, | |
788 | unsigned int base, | |
789 | int adaptor, | |
790 | int droponfull, | |
0b830bac | 791 | struct snd_uart16550 **ruart) |
1da177e4 | 792 | { |
4a4d2cfd | 793 | static struct snd_device_ops ops = { |
1da177e4 LT |
794 | .dev_free = snd_uart16550_dev_free, |
795 | }; | |
0b830bac | 796 | struct snd_uart16550 *uart; |
1da177e4 LT |
797 | int err; |
798 | ||
799 | ||
561b220a | 800 | if ((uart = kzalloc(sizeof(*uart), GFP_KERNEL)) == NULL) |
1da177e4 LT |
801 | return -ENOMEM; |
802 | uart->adaptor = adaptor; | |
803 | uart->card = card; | |
804 | spin_lock_init(&uart->open_lock); | |
805 | uart->irq = -1; | |
806 | uart->base = iobase; | |
807 | uart->drop_on_full = droponfull; | |
808 | ||
809 | if ((err = snd_uart16550_detect(uart)) <= 0) { | |
810 | printk(KERN_ERR "no UART detected at 0x%lx\n", iobase); | |
202728d7 | 811 | snd_uart16550_free(uart); |
68b8bc05 | 812 | return -ENODEV; |
1da177e4 LT |
813 | } |
814 | ||
815 | if (irq >= 0 && irq != SNDRV_AUTO_IRQ) { | |
816 | if (request_irq(irq, snd_uart16550_interrupt, | |
0b830bac | 817 | IRQF_DISABLED, "Serial MIDI", uart)) { |
1da177e4 LT |
818 | snd_printk("irq %d busy. Using Polling.\n", irq); |
819 | } else { | |
820 | uart->irq = irq; | |
821 | } | |
822 | } | |
823 | uart->divisor = base / speed; | |
824 | uart->speed = base / (unsigned int)uart->divisor; | |
825 | uart->speed_base = base; | |
826 | uart->prev_out = -1; | |
827 | uart->prev_in = 0; | |
828 | uart->rstatus = 0; | |
829 | memset(uart->prev_status, 0x80, sizeof(unsigned char) * SNDRV_SERIAL_MAX_OUTS); | |
830 | init_timer(&uart->buffer_timer); | |
831 | uart->buffer_timer.function = snd_uart16550_buffer_timer; | |
832 | uart->buffer_timer.data = (unsigned long)uart; | |
833 | uart->timer_running = 0; | |
834 | ||
835 | /* Register device */ | |
836 | if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, uart, &ops)) < 0) { | |
837 | snd_uart16550_free(uart); | |
838 | return err; | |
839 | } | |
840 | ||
841 | switch (uart->adaptor) { | |
842 | case SNDRV_SERIAL_MS124W_SA: | |
843 | case SNDRV_SERIAL_MS124W_MB: | |
844 | /* MS-124W can draw power from RTS and DTR if they | |
845 | are in opposite states. */ | |
846 | outb(UART_MCR_RTS | (0&UART_MCR_DTR), uart->base + UART_MCR); | |
847 | break; | |
848 | case SNDRV_SERIAL_MS124T: | |
849 | /* MS-124T can draw power from RTS and/or DTR (preferably | |
850 | both) if they are asserted. */ | |
851 | outb(UART_MCR_RTS | UART_MCR_DTR, uart->base + UART_MCR); | |
852 | break; | |
853 | default: | |
854 | break; | |
855 | } | |
856 | ||
857 | if (ruart) | |
858 | *ruart = uart; | |
859 | ||
860 | return 0; | |
861 | } | |
862 | ||
788c6043 | 863 | static void __devinit snd_uart16550_substreams(struct snd_rawmidi_str *stream) |
1da177e4 | 864 | { |
0b830bac | 865 | struct snd_rawmidi_substream *substream; |
1da177e4 | 866 | |
0b830bac | 867 | list_for_each_entry(substream, &stream->substreams, list) { |
1da177e4 LT |
868 | sprintf(substream->name, "Serial MIDI %d", substream->number + 1); |
869 | } | |
870 | } | |
871 | ||
788c6043 | 872 | static int __devinit snd_uart16550_rmidi(struct snd_uart16550 *uart, int device, |
0b830bac TI |
873 | int outs, int ins, |
874 | struct snd_rawmidi **rmidi) | |
1da177e4 | 875 | { |
4a4d2cfd | 876 | struct snd_rawmidi *rrawmidi; |
1da177e4 LT |
877 | int err; |
878 | ||
0b830bac TI |
879 | err = snd_rawmidi_new(uart->card, "UART Serial MIDI", device, |
880 | outs, ins, &rrawmidi); | |
881 | if (err < 0) | |
1da177e4 | 882 | return err; |
0b830bac TI |
883 | snd_rawmidi_set_ops(rrawmidi, SNDRV_RAWMIDI_STREAM_INPUT, |
884 | &snd_uart16550_input); | |
885 | snd_rawmidi_set_ops(rrawmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, | |
886 | &snd_uart16550_output); | |
1da177e4 LT |
887 | strcpy(rrawmidi->name, "Serial MIDI"); |
888 | snd_uart16550_substreams(&rrawmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]); | |
889 | snd_uart16550_substreams(&rrawmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]); | |
890 | rrawmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT | | |
891 | SNDRV_RAWMIDI_INFO_INPUT | | |
892 | SNDRV_RAWMIDI_INFO_DUPLEX; | |
893 | rrawmidi->private_data = uart; | |
894 | if (rmidi) | |
895 | *rmidi = rrawmidi; | |
896 | return 0; | |
897 | } | |
898 | ||
788c6043 | 899 | static int __devinit snd_serial_probe(struct platform_device *devptr) |
1da177e4 | 900 | { |
4a4d2cfd | 901 | struct snd_card *card; |
0b830bac | 902 | struct snd_uart16550 *uart; |
1da177e4 | 903 | int err; |
9caf6b59 | 904 | int dev = devptr->id; |
1da177e4 LT |
905 | |
906 | switch (adaptor[dev]) { | |
907 | case SNDRV_SERIAL_SOUNDCANVAS: | |
908 | ins[dev] = 1; | |
909 | break; | |
910 | case SNDRV_SERIAL_MS124T: | |
911 | case SNDRV_SERIAL_MS124W_SA: | |
912 | outs[dev] = 1; | |
913 | ins[dev] = 1; | |
914 | break; | |
915 | case SNDRV_SERIAL_MS124W_MB: | |
916 | outs[dev] = 16; | |
917 | ins[dev] = 1; | |
918 | break; | |
919 | case SNDRV_SERIAL_GENERIC: | |
920 | break; | |
921 | default: | |
922 | snd_printk("Adaptor type is out of range 0-%d (%d)\n", | |
923 | SNDRV_SERIAL_MAX_ADAPTOR, adaptor[dev]); | |
924 | return -ENODEV; | |
925 | } | |
926 | ||
927 | if (outs[dev] < 1 || outs[dev] > SNDRV_SERIAL_MAX_OUTS) { | |
928 | snd_printk("Count of outputs is out of range 1-%d (%d)\n", | |
929 | SNDRV_SERIAL_MAX_OUTS, outs[dev]); | |
930 | return -ENODEV; | |
931 | } | |
932 | ||
933 | if (ins[dev] < 1 || ins[dev] > SNDRV_SERIAL_MAX_INS) { | |
934 | snd_printk("Count of inputs is out of range 1-%d (%d)\n", | |
935 | SNDRV_SERIAL_MAX_INS, ins[dev]); | |
936 | return -ENODEV; | |
937 | } | |
938 | ||
939 | card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0); | |
940 | if (card == NULL) | |
941 | return -ENOMEM; | |
942 | ||
943 | strcpy(card->driver, "Serial"); | |
944 | strcpy(card->shortname, "Serial MIDI (UART16550A)"); | |
945 | ||
946 | if ((err = snd_uart16550_create(card, | |
947 | port[dev], | |
948 | irq[dev], | |
949 | speed[dev], | |
950 | base[dev], | |
951 | adaptor[dev], | |
952 | droponfull[dev], | |
16dab54b TI |
953 | &uart)) < 0) |
954 | goto _err; | |
1da177e4 | 955 | |
0b830bac TI |
956 | err = snd_uart16550_rmidi(uart, 0, outs[dev], ins[dev], &uart->rmidi); |
957 | if (err < 0) | |
16dab54b | 958 | goto _err; |
1da177e4 LT |
959 | |
960 | sprintf(card->longname, "%s at 0x%lx, irq %d speed %d div %d outs %d ins %d adaptor %s droponfull %d", | |
961 | card->shortname, | |
962 | uart->base, | |
963 | uart->irq, | |
964 | uart->speed, | |
965 | (int)uart->divisor, | |
966 | outs[dev], | |
967 | ins[dev], | |
968 | adaptor_names[uart->adaptor], | |
969 | uart->drop_on_full); | |
970 | ||
9caf6b59 | 971 | snd_card_set_dev(card, &devptr->dev); |
16dab54b TI |
972 | |
973 | if ((err = snd_card_register(card)) < 0) | |
974 | goto _err; | |
975 | ||
9caf6b59 | 976 | platform_set_drvdata(devptr, card); |
1da177e4 | 977 | return 0; |
16dab54b TI |
978 | |
979 | _err: | |
980 | snd_card_free(card); | |
981 | return err; | |
1da177e4 LT |
982 | } |
983 | ||
788c6043 | 984 | static int __devexit snd_serial_remove(struct platform_device *devptr) |
9caf6b59 TI |
985 | { |
986 | snd_card_free(platform_get_drvdata(devptr)); | |
987 | platform_set_drvdata(devptr, NULL); | |
988 | return 0; | |
989 | } | |
990 | ||
991 | #define SND_SERIAL_DRIVER "snd_serial_u16550" | |
992 | ||
993 | static struct platform_driver snd_serial_driver = { | |
994 | .probe = snd_serial_probe, | |
788c6043 | 995 | .remove = __devexit_p( snd_serial_remove), |
9caf6b59 TI |
996 | .driver = { |
997 | .name = SND_SERIAL_DRIVER | |
998 | }, | |
999 | }; | |
1000 | ||
bdec0c72 | 1001 | static void snd_serial_unregister_all(void) |
f7a9275d CL |
1002 | { |
1003 | int i; | |
1004 | ||
1005 | for (i = 0; i < ARRAY_SIZE(devices); ++i) | |
1006 | platform_device_unregister(devices[i]); | |
1007 | platform_driver_unregister(&snd_serial_driver); | |
1008 | } | |
1009 | ||
1da177e4 LT |
1010 | static int __init alsa_card_serial_init(void) |
1011 | { | |
9caf6b59 | 1012 | int i, cards, err; |
1da177e4 | 1013 | |
9caf6b59 TI |
1014 | if ((err = platform_driver_register(&snd_serial_driver)) < 0) |
1015 | return err; | |
1da177e4 | 1016 | |
9caf6b59 | 1017 | cards = 0; |
8278ca8f | 1018 | for (i = 0; i < SNDRV_CARDS; i++) { |
9caf6b59 | 1019 | struct platform_device *device; |
8278ca8f TI |
1020 | if (! enable[i]) |
1021 | continue; | |
9caf6b59 TI |
1022 | device = platform_device_register_simple(SND_SERIAL_DRIVER, |
1023 | i, NULL, 0); | |
a182ee98 RH |
1024 | if (IS_ERR(device)) |
1025 | continue; | |
7152447d RH |
1026 | if (!platform_get_drvdata(device)) { |
1027 | platform_device_unregister(device); | |
1028 | continue; | |
1029 | } | |
f7a9275d | 1030 | devices[i] = device; |
9caf6b59 TI |
1031 | cards++; |
1032 | } | |
1033 | if (! cards) { | |
1da177e4 LT |
1034 | #ifdef MODULE |
1035 | printk(KERN_ERR "serial midi soundcard not found or device busy\n"); | |
1036 | #endif | |
a182ee98 RH |
1037 | snd_serial_unregister_all(); |
1038 | return -ENODEV; | |
1da177e4 LT |
1039 | } |
1040 | return 0; | |
1041 | } | |
1042 | ||
1043 | static void __exit alsa_card_serial_exit(void) | |
1044 | { | |
f7a9275d | 1045 | snd_serial_unregister_all(); |
1da177e4 LT |
1046 | } |
1047 | ||
1048 | module_init(alsa_card_serial_init) | |
1049 | module_exit(alsa_card_serial_exit) |