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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> | |
65a77217 | 39 | #include <linux/module.h> |
6cbbfe1c | 40 | #include <linux/io.h> |
1da177e4 LT |
41 | #include <sound/core.h> |
42 | #include <sound/rawmidi.h> | |
43 | #include <sound/initval.h> | |
44 | ||
45 | #include <linux/serial_reg.h> | |
f11b7992 | 46 | #include <linux/jiffies.h> |
1da177e4 | 47 | |
1da177e4 LT |
48 | MODULE_DESCRIPTION("MIDI serial u16550"); |
49 | MODULE_LICENSE("GPL"); | |
50 | MODULE_SUPPORTED_DEVICE("{{ALSA, MIDI serial u16550}}"); | |
51 | ||
52 | #define SNDRV_SERIAL_SOUNDCANVAS 0 /* Roland Soundcanvas; F5 NN selects part */ | |
53 | #define SNDRV_SERIAL_MS124T 1 /* Midiator MS-124T */ | |
54 | #define SNDRV_SERIAL_MS124W_SA 2 /* Midiator MS-124W in S/A mode */ | |
55 | #define SNDRV_SERIAL_MS124W_MB 3 /* Midiator MS-124W in M/B mode */ | |
56 | #define SNDRV_SERIAL_GENERIC 4 /* Generic Interface */ | |
57 | #define SNDRV_SERIAL_MAX_ADAPTOR SNDRV_SERIAL_GENERIC | |
58 | static char *adaptor_names[] = { | |
59 | "Soundcanvas", | |
60 | "MS-124T", | |
61 | "MS-124W S/A", | |
62 | "MS-124W M/B", | |
63 | "Generic" | |
64 | }; | |
65 | ||
66 | #define SNDRV_SERIAL_NORMALBUFF 0 /* Normal blocking buffer operation */ | |
67 | #define SNDRV_SERIAL_DROPBUFF 1 /* Non-blocking discard operation */ | |
68 | ||
69 | static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */ | |
70 | static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */ | |
a67ff6a5 | 71 | static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE; /* Enable this card */ |
1da177e4 LT |
72 | static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT; /* 0x3f8,0x2f8,0x3e8,0x2e8 */ |
73 | static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ; /* 3,4,5,7,9,10,11,14,15 */ | |
74 | static int speed[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 38400}; /* 9600,19200,38400,57600,115200 */ | |
75 | static int base[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 115200}; /* baud base */ | |
76 | static int outs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1}; /* 1 to 16 */ | |
77 | static int ins[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1}; /* 1 to 16 */ | |
78 | static int adaptor[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = SNDRV_SERIAL_SOUNDCANVAS}; | |
a67ff6a5 | 79 | static bool droponfull[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS -1)] = SNDRV_SERIAL_NORMALBUFF }; |
1da177e4 LT |
80 | |
81 | module_param_array(index, int, NULL, 0444); | |
82 | MODULE_PARM_DESC(index, "Index value for Serial MIDI."); | |
83 | module_param_array(id, charp, NULL, 0444); | |
84 | MODULE_PARM_DESC(id, "ID string for Serial MIDI."); | |
85 | module_param_array(enable, bool, NULL, 0444); | |
86 | MODULE_PARM_DESC(enable, "Enable UART16550A chip."); | |
87 | module_param_array(port, long, NULL, 0444); | |
88 | MODULE_PARM_DESC(port, "Port # for UART16550A chip."); | |
89 | module_param_array(irq, int, NULL, 0444); | |
90 | MODULE_PARM_DESC(irq, "IRQ # for UART16550A chip."); | |
91 | module_param_array(speed, int, NULL, 0444); | |
92 | MODULE_PARM_DESC(speed, "Speed in bauds."); | |
93 | module_param_array(base, int, NULL, 0444); | |
94 | MODULE_PARM_DESC(base, "Base for divisor in bauds."); | |
95 | module_param_array(outs, int, NULL, 0444); | |
96 | MODULE_PARM_DESC(outs, "Number of MIDI outputs."); | |
97 | module_param_array(ins, int, NULL, 0444); | |
98 | MODULE_PARM_DESC(ins, "Number of MIDI inputs."); | |
99 | module_param_array(droponfull, bool, NULL, 0444); | |
100 | MODULE_PARM_DESC(droponfull, "Flag to enable drop-on-full buffer mode"); | |
101 | ||
102 | module_param_array(adaptor, int, NULL, 0444); | |
103 | MODULE_PARM_DESC(adaptor, "Type of adaptor."); | |
104 | ||
105 | /*#define SNDRV_SERIAL_MS124W_MB_NOCOMBO 1*/ /* Address outs as 0-3 instead of bitmap */ | |
106 | ||
107 | #define SNDRV_SERIAL_MAX_OUTS 16 /* max 64, min 16 */ | |
108 | #define SNDRV_SERIAL_MAX_INS 16 /* max 64, min 16 */ | |
109 | ||
110 | #define TX_BUFF_SIZE (1<<15) /* Must be 2^n */ | |
111 | #define TX_BUFF_MASK (TX_BUFF_SIZE - 1) | |
112 | ||
113 | #define SERIAL_MODE_NOT_OPENED (0) | |
114 | #define SERIAL_MODE_INPUT_OPEN (1 << 0) | |
115 | #define SERIAL_MODE_OUTPUT_OPEN (1 << 1) | |
116 | #define SERIAL_MODE_INPUT_TRIGGERED (1 << 2) | |
117 | #define SERIAL_MODE_OUTPUT_TRIGGERED (1 << 3) | |
118 | ||
0b830bac | 119 | struct snd_uart16550 { |
4a4d2cfd TI |
120 | struct snd_card *card; |
121 | struct snd_rawmidi *rmidi; | |
122 | struct snd_rawmidi_substream *midi_output[SNDRV_SERIAL_MAX_OUTS]; | |
123 | struct snd_rawmidi_substream *midi_input[SNDRV_SERIAL_MAX_INS]; | |
1da177e4 | 124 | |
0b830bac | 125 | int filemode; /* open status of file */ |
1da177e4 LT |
126 | |
127 | spinlock_t open_lock; | |
128 | ||
129 | int irq; | |
130 | ||
131 | unsigned long base; | |
132 | struct resource *res_base; | |
133 | ||
134 | unsigned int speed; | |
135 | unsigned int speed_base; | |
136 | unsigned char divisor; | |
137 | ||
138 | unsigned char old_divisor_lsb; | |
139 | unsigned char old_divisor_msb; | |
140 | unsigned char old_line_ctrl_reg; | |
141 | ||
0b830bac TI |
142 | /* parameter for using of write loop */ |
143 | short int fifo_limit; /* used in uart16550 */ | |
144 | short int fifo_count; /* used in uart16550 */ | |
1da177e4 | 145 | |
0b830bac | 146 | /* type of adaptor */ |
1da177e4 LT |
147 | int adaptor; |
148 | ||
0b830bac | 149 | /* inputs */ |
1da177e4 LT |
150 | int prev_in; |
151 | unsigned char rstatus; | |
152 | ||
0b830bac | 153 | /* outputs */ |
1da177e4 LT |
154 | int prev_out; |
155 | unsigned char prev_status[SNDRV_SERIAL_MAX_OUTS]; | |
156 | ||
0b830bac | 157 | /* write buffer and its writing/reading position */ |
1da177e4 LT |
158 | unsigned char tx_buff[TX_BUFF_SIZE]; |
159 | int buff_in_count; | |
160 | int buff_in; | |
161 | int buff_out; | |
162 | int drop_on_full; | |
163 | ||
0b830bac | 164 | /* wait timer */ |
1da177e4 LT |
165 | unsigned int timer_running:1; |
166 | struct timer_list buffer_timer; | |
167 | ||
0b830bac | 168 | }; |
1da177e4 | 169 | |
f7a9275d CL |
170 | static struct platform_device *devices[SNDRV_CARDS]; |
171 | ||
0b830bac | 172 | static inline void snd_uart16550_add_timer(struct snd_uart16550 *uart) |
1da177e4 | 173 | { |
0b830bac | 174 | if (!uart->timer_running) { |
1da177e4 | 175 | /* timer 38600bps * 10bit * 16byte */ |
d80d05fc | 176 | mod_timer(&uart->buffer_timer, jiffies + (HZ + 255) / 256); |
1da177e4 | 177 | uart->timer_running = 1; |
1da177e4 LT |
178 | } |
179 | } | |
180 | ||
0b830bac | 181 | static inline void snd_uart16550_del_timer(struct snd_uart16550 *uart) |
1da177e4 LT |
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 */ | |
0b830bac | 190 | static inline void snd_uart16550_buffer_output(struct snd_uart16550 *uart) |
1da177e4 LT |
191 | { |
192 | unsigned short buff_out = uart->buff_out; | |
0b830bac | 193 | if (uart->buff_in_count > 0) { |
1da177e4 LT |
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 | */ | |
0b830bac | 207 | static void snd_uart16550_io_loop(struct snd_uart16550 * uart) |
1da177e4 LT |
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 */ | |
0b830bac | 221 | if (c & 0x80) |
1da177e4 | 222 | uart->rstatus = c; |
1da177e4 LT |
223 | |
224 | /* handle stream switch */ | |
225 | if (uart->adaptor == SNDRV_SERIAL_GENERIC) { | |
226 | if (uart->rstatus == 0xf5) { | |
227 | if (c <= SNDRV_SERIAL_MAX_INS && c > 0) | |
228 | substream = c - 1; | |
229 | if (c != 0xf5) | |
0b830bac TI |
230 | /* prevent future bytes from being |
231 | interpreted as streams */ | |
232 | uart->rstatus = 0; | |
233 | } else if ((uart->filemode & SERIAL_MODE_INPUT_OPEN) | |
234 | && uart->midi_input[substream]) | |
235 | snd_rawmidi_receive(uart->midi_input[substream], | |
236 | &c, 1); | |
237 | } else if ((uart->filemode & SERIAL_MODE_INPUT_OPEN) && | |
238 | uart->midi_input[substream]) | |
1da177e4 | 239 | snd_rawmidi_receive(uart->midi_input[substream], &c, 1); |
1da177e4 LT |
240 | |
241 | if (status & UART_LSR_OE) | |
45203832 TI |
242 | snd_printk(KERN_WARNING |
243 | "%s: Overrun on device at 0x%lx\n", | |
1da177e4 LT |
244 | uart->rmidi->name, uart->base); |
245 | } | |
246 | ||
247 | /* remember the last stream */ | |
248 | uart->prev_in = substream; | |
249 | ||
250 | /* no need of check SERIAL_MODE_OUTPUT_OPEN because if not, | |
251 | buffer is never filled. */ | |
252 | /* Check write status */ | |
0b830bac | 253 | if (status & UART_LSR_THRE) |
1da177e4 | 254 | uart->fifo_count = 0; |
1da177e4 LT |
255 | if (uart->adaptor == SNDRV_SERIAL_MS124W_SA |
256 | || uart->adaptor == SNDRV_SERIAL_GENERIC) { | |
257 | /* Can't use FIFO, must send only when CTS is true */ | |
258 | status = inb(uart->base + UART_MSR); | |
0b830bac TI |
259 | while (uart->fifo_count == 0 && (status & UART_MSR_CTS) && |
260 | uart->buff_in_count > 0) { | |
1da177e4 | 261 | snd_uart16550_buffer_output(uart); |
0b830bac | 262 | status = inb(uart->base + UART_MSR); |
1da177e4 LT |
263 | } |
264 | } else { | |
265 | /* Write loop */ | |
0b830bac | 266 | while (uart->fifo_count < uart->fifo_limit /* Can we write ? */ |
1da177e4 LT |
267 | && uart->buff_in_count > 0) /* Do we want to? */ |
268 | snd_uart16550_buffer_output(uart); | |
269 | } | |
270 | if (uart->irq < 0 && uart->buff_in_count > 0) | |
271 | snd_uart16550_add_timer(uart); | |
272 | } | |
273 | ||
274 | /* NOTES ON SERVICING INTERUPTS | |
275 | * --------------------------- | |
276 | * After receiving a interrupt, it is important to indicate to the UART that | |
277 | * this has been done. | |
278 | * For a Rx interrupt, this is done by reading the received byte. | |
279 | * For a Tx interrupt this is done by either: | |
280 | * a) Writing a byte | |
281 | * b) Reading the IIR | |
282 | * It is particularly important to read the IIR if a Tx interrupt is received | |
283 | * when there is no data in tx_buff[], as in this case there no other | |
284 | * indication that the interrupt has been serviced, and it remains outstanding | |
285 | * indefinitely. This has the curious side effect that and no further interrupts | |
286 | * will be generated from this device AT ALL!!. | |
287 | * It is also desirable to clear outstanding interrupts when the device is | |
288 | * opened/closed. | |
289 | * | |
290 | * | |
291 | * Note that some devices need OUT2 to be set before they will generate | |
292 | * interrupts at all. (Possibly tied to an internal pull-up on CTS?) | |
293 | */ | |
7d12e780 | 294 | static irqreturn_t snd_uart16550_interrupt(int irq, void *dev_id) |
1da177e4 | 295 | { |
0b830bac | 296 | struct snd_uart16550 *uart; |
1da177e4 | 297 | |
0b830bac | 298 | uart = dev_id; |
1da177e4 LT |
299 | spin_lock(&uart->open_lock); |
300 | if (uart->filemode == SERIAL_MODE_NOT_OPENED) { | |
301 | spin_unlock(&uart->open_lock); | |
302 | return IRQ_NONE; | |
303 | } | |
0b830bac TI |
304 | /* indicate to the UART that the interrupt has been serviced */ |
305 | inb(uart->base + UART_IIR); | |
1da177e4 LT |
306 | snd_uart16550_io_loop(uart); |
307 | spin_unlock(&uart->open_lock); | |
308 | return IRQ_HANDLED; | |
309 | } | |
310 | ||
311 | /* When the polling mode, this function calls snd_uart16550_io_loop. */ | |
312 | static void snd_uart16550_buffer_timer(unsigned long data) | |
313 | { | |
314 | unsigned long flags; | |
0b830bac | 315 | struct snd_uart16550 *uart; |
1da177e4 | 316 | |
0b830bac | 317 | uart = (struct snd_uart16550 *)data; |
1da177e4 LT |
318 | spin_lock_irqsave(&uart->open_lock, flags); |
319 | snd_uart16550_del_timer(uart); | |
320 | snd_uart16550_io_loop(uart); | |
321 | spin_unlock_irqrestore(&uart->open_lock, flags); | |
322 | } | |
323 | ||
324 | /* | |
325 | * this method probes, if an uart sits on given port | |
326 | * return 0 if found | |
327 | * return negative error if not found | |
328 | */ | |
fbbb01a1 | 329 | static int snd_uart16550_detect(struct snd_uart16550 *uart) |
1da177e4 LT |
330 | { |
331 | unsigned long io_base = uart->base; | |
332 | int ok; | |
333 | unsigned char c; | |
334 | ||
335 | /* Do some vague tests for the presence of the uart */ | |
336 | if (io_base == 0 || io_base == SNDRV_AUTO_PORT) { | |
337 | return -ENODEV; /* Not configured */ | |
338 | } | |
339 | ||
340 | uart->res_base = request_region(io_base, 8, "Serial MIDI"); | |
341 | if (uart->res_base == NULL) { | |
342 | snd_printk(KERN_ERR "u16550: can't grab port 0x%lx\n", io_base); | |
343 | return -EBUSY; | |
344 | } | |
345 | ||
0b830bac TI |
346 | /* uart detected unless one of the following tests should fail */ |
347 | ok = 1; | |
1da177e4 LT |
348 | /* 8 data-bits, 1 stop-bit, parity off, DLAB = 0 */ |
349 | outb(UART_LCR_WLEN8, io_base + UART_LCR); /* Line Control Register */ | |
350 | c = inb(io_base + UART_IER); | |
351 | /* The top four bits of the IER should always == 0 */ | |
352 | if ((c & 0xf0) != 0) | |
353 | ok = 0; /* failed */ | |
354 | ||
355 | outb(0xaa, io_base + UART_SCR); | |
356 | /* Write arbitrary data into the scratch reg */ | |
357 | c = inb(io_base + UART_SCR); | |
358 | /* If it comes back, it's OK */ | |
359 | if (c != 0xaa) | |
360 | ok = 0; /* failed */ | |
361 | ||
362 | outb(0x55, io_base + UART_SCR); | |
363 | /* Write arbitrary data into the scratch reg */ | |
364 | c = inb(io_base + UART_SCR); | |
365 | /* If it comes back, it's OK */ | |
366 | if (c != 0x55) | |
367 | ok = 0; /* failed */ | |
368 | ||
369 | return ok; | |
370 | } | |
371 | ||
0b830bac | 372 | static void snd_uart16550_do_open(struct snd_uart16550 * uart) |
1da177e4 LT |
373 | { |
374 | char byte; | |
375 | ||
376 | /* Initialize basic variables */ | |
377 | uart->buff_in_count = 0; | |
378 | uart->buff_in = 0; | |
379 | uart->buff_out = 0; | |
380 | uart->fifo_limit = 1; | |
381 | uart->fifo_count = 0; | |
382 | uart->timer_running = 0; | |
383 | ||
384 | outb(UART_FCR_ENABLE_FIFO /* Enable FIFO's (if available) */ | |
385 | | UART_FCR_CLEAR_RCVR /* Clear receiver FIFO */ | |
386 | | UART_FCR_CLEAR_XMIT /* Clear transmitter FIFO */ | |
387 | | UART_FCR_TRIGGER_4 /* Set FIFO trigger at 4-bytes */ | |
388 | /* NOTE: interrupt generated after T=(time)4-bytes | |
389 | * if less than UART_FCR_TRIGGER bytes received | |
390 | */ | |
391 | ,uart->base + UART_FCR); /* FIFO Control Register */ | |
392 | ||
393 | if ((inb(uart->base + UART_IIR) & 0xf0) == 0xc0) | |
394 | uart->fifo_limit = 16; | |
395 | if (uart->divisor != 0) { | |
396 | uart->old_line_ctrl_reg = inb(uart->base + UART_LCR); | |
397 | outb(UART_LCR_DLAB /* Divisor latch access bit */ | |
398 | ,uart->base + UART_LCR); /* Line Control Register */ | |
399 | uart->old_divisor_lsb = inb(uart->base + UART_DLL); | |
400 | uart->old_divisor_msb = inb(uart->base + UART_DLM); | |
401 | ||
402 | outb(uart->divisor | |
403 | ,uart->base + UART_DLL); /* Divisor Latch Low */ | |
404 | outb(0 | |
405 | ,uart->base + UART_DLM); /* Divisor Latch High */ | |
406 | /* DLAB is reset to 0 in next outb() */ | |
407 | } | |
408 | /* Set serial parameters (parity off, etc) */ | |
409 | outb(UART_LCR_WLEN8 /* 8 data-bits */ | |
410 | | 0 /* 1 stop-bit */ | |
411 | | 0 /* parity off */ | |
412 | | 0 /* DLAB = 0 */ | |
413 | ,uart->base + UART_LCR); /* Line Control Register */ | |
414 | ||
415 | switch (uart->adaptor) { | |
416 | default: | |
417 | outb(UART_MCR_RTS /* Set Request-To-Send line active */ | |
418 | | UART_MCR_DTR /* Set Data-Terminal-Ready line active */ | |
419 | | UART_MCR_OUT2 /* Set OUT2 - not always required, but when | |
420 | * it is, it is ESSENTIAL for enabling interrupts | |
421 | */ | |
422 | ,uart->base + UART_MCR); /* Modem Control Register */ | |
423 | break; | |
424 | case SNDRV_SERIAL_MS124W_SA: | |
425 | case SNDRV_SERIAL_MS124W_MB: | |
426 | /* MS-124W can draw power from RTS and DTR if they | |
427 | are in opposite states. */ | |
428 | outb(UART_MCR_RTS | (0&UART_MCR_DTR) | UART_MCR_OUT2, | |
429 | uart->base + UART_MCR); | |
430 | break; | |
431 | case SNDRV_SERIAL_MS124T: | |
432 | /* MS-124T can draw power from RTS and/or DTR (preferably | |
433 | both) if they are both asserted. */ | |
434 | outb(UART_MCR_RTS | UART_MCR_DTR | UART_MCR_OUT2, | |
435 | uart->base + UART_MCR); | |
436 | break; | |
437 | } | |
438 | ||
439 | if (uart->irq < 0) { | |
440 | byte = (0 & UART_IER_RDI) /* Disable Receiver data interrupt */ | |
441 | |(0 & UART_IER_THRI) /* Disable Transmitter holding register empty interrupt */ | |
442 | ; | |
443 | } else if (uart->adaptor == SNDRV_SERIAL_MS124W_SA) { | |
444 | byte = UART_IER_RDI /* Enable Receiver data interrupt */ | |
445 | | UART_IER_MSI /* Enable Modem status interrupt */ | |
446 | ; | |
447 | } else if (uart->adaptor == SNDRV_SERIAL_GENERIC) { | |
448 | byte = UART_IER_RDI /* Enable Receiver data interrupt */ | |
449 | | UART_IER_MSI /* Enable Modem status interrupt */ | |
450 | | UART_IER_THRI /* Enable Transmitter holding register empty interrupt */ | |
451 | ; | |
452 | } else { | |
453 | byte = UART_IER_RDI /* Enable Receiver data interrupt */ | |
454 | | UART_IER_THRI /* Enable Transmitter holding register empty interrupt */ | |
455 | ; | |
456 | } | |
561de31a | 457 | outb(byte, uart->base + UART_IER); /* Interrupt enable Register */ |
1da177e4 LT |
458 | |
459 | inb(uart->base + UART_LSR); /* Clear any pre-existing overrun indication */ | |
460 | inb(uart->base + UART_IIR); /* Clear any pre-existing transmit interrupt */ | |
461 | inb(uart->base + UART_RX); /* Clear any pre-existing receive interrupt */ | |
462 | } | |
463 | ||
0b830bac | 464 | static void snd_uart16550_do_close(struct snd_uart16550 * uart) |
1da177e4 LT |
465 | { |
466 | if (uart->irq < 0) | |
467 | snd_uart16550_del_timer(uart); | |
468 | ||
469 | /* NOTE: may need to disable interrupts before de-registering out handler. | |
470 | * For now, the consequences are harmless. | |
471 | */ | |
472 | ||
473 | outb((0 & UART_IER_RDI) /* Disable Receiver data interrupt */ | |
474 | |(0 & UART_IER_THRI) /* Disable Transmitter holding register empty interrupt */ | |
561de31a | 475 | ,uart->base + UART_IER); /* Interrupt enable Register */ |
1da177e4 LT |
476 | |
477 | switch (uart->adaptor) { | |
478 | default: | |
479 | outb((0 & UART_MCR_RTS) /* Deactivate Request-To-Send line */ | |
480 | |(0 & UART_MCR_DTR) /* Deactivate Data-Terminal-Ready line */ | |
481 | |(0 & UART_MCR_OUT2) /* Deactivate OUT2 */ | |
482 | ,uart->base + UART_MCR); /* Modem Control Register */ | |
483 | break; | |
484 | case SNDRV_SERIAL_MS124W_SA: | |
485 | case SNDRV_SERIAL_MS124W_MB: | |
486 | /* MS-124W can draw power from RTS and DTR if they | |
487 | are in opposite states; leave it powered. */ | |
488 | outb(UART_MCR_RTS | (0&UART_MCR_DTR) | (0&UART_MCR_OUT2), | |
489 | uart->base + UART_MCR); | |
490 | break; | |
491 | case SNDRV_SERIAL_MS124T: | |
492 | /* MS-124T can draw power from RTS and/or DTR (preferably | |
493 | both) if they are both asserted; leave it powered. */ | |
494 | outb(UART_MCR_RTS | UART_MCR_DTR | (0&UART_MCR_OUT2), | |
495 | uart->base + UART_MCR); | |
496 | break; | |
497 | } | |
498 | ||
499 | inb(uart->base + UART_IIR); /* Clear any outstanding interrupts */ | |
500 | ||
501 | /* Restore old divisor */ | |
502 | if (uart->divisor != 0) { | |
503 | outb(UART_LCR_DLAB /* Divisor latch access bit */ | |
504 | ,uart->base + UART_LCR); /* Line Control Register */ | |
505 | outb(uart->old_divisor_lsb | |
506 | ,uart->base + UART_DLL); /* Divisor Latch Low */ | |
507 | outb(uart->old_divisor_msb | |
508 | ,uart->base + UART_DLM); /* Divisor Latch High */ | |
509 | /* Restore old LCR (data bits, stop bits, parity, DLAB) */ | |
510 | outb(uart->old_line_ctrl_reg | |
511 | ,uart->base + UART_LCR); /* Line Control Register */ | |
512 | } | |
513 | } | |
514 | ||
4a4d2cfd | 515 | static int snd_uart16550_input_open(struct snd_rawmidi_substream *substream) |
1da177e4 LT |
516 | { |
517 | unsigned long flags; | |
0b830bac | 518 | struct snd_uart16550 *uart = substream->rmidi->private_data; |
1da177e4 LT |
519 | |
520 | spin_lock_irqsave(&uart->open_lock, flags); | |
521 | if (uart->filemode == SERIAL_MODE_NOT_OPENED) | |
522 | snd_uart16550_do_open(uart); | |
523 | uart->filemode |= SERIAL_MODE_INPUT_OPEN; | |
524 | uart->midi_input[substream->number] = substream; | |
525 | spin_unlock_irqrestore(&uart->open_lock, flags); | |
526 | return 0; | |
527 | } | |
528 | ||
4a4d2cfd | 529 | static int snd_uart16550_input_close(struct snd_rawmidi_substream *substream) |
1da177e4 LT |
530 | { |
531 | unsigned long flags; | |
0b830bac | 532 | struct snd_uart16550 *uart = substream->rmidi->private_data; |
1da177e4 LT |
533 | |
534 | spin_lock_irqsave(&uart->open_lock, flags); | |
535 | uart->filemode &= ~SERIAL_MODE_INPUT_OPEN; | |
536 | uart->midi_input[substream->number] = NULL; | |
537 | if (uart->filemode == SERIAL_MODE_NOT_OPENED) | |
538 | snd_uart16550_do_close(uart); | |
539 | spin_unlock_irqrestore(&uart->open_lock, flags); | |
540 | return 0; | |
541 | } | |
542 | ||
0b830bac TI |
543 | static void snd_uart16550_input_trigger(struct snd_rawmidi_substream *substream, |
544 | int up) | |
1da177e4 LT |
545 | { |
546 | unsigned long flags; | |
0b830bac | 547 | struct snd_uart16550 *uart = substream->rmidi->private_data; |
1da177e4 LT |
548 | |
549 | spin_lock_irqsave(&uart->open_lock, flags); | |
0b830bac | 550 | if (up) |
1da177e4 | 551 | uart->filemode |= SERIAL_MODE_INPUT_TRIGGERED; |
0b830bac | 552 | else |
1da177e4 | 553 | uart->filemode &= ~SERIAL_MODE_INPUT_TRIGGERED; |
1da177e4 LT |
554 | spin_unlock_irqrestore(&uart->open_lock, flags); |
555 | } | |
556 | ||
4a4d2cfd | 557 | static int snd_uart16550_output_open(struct snd_rawmidi_substream *substream) |
1da177e4 LT |
558 | { |
559 | unsigned long flags; | |
0b830bac | 560 | struct snd_uart16550 *uart = substream->rmidi->private_data; |
1da177e4 LT |
561 | |
562 | spin_lock_irqsave(&uart->open_lock, flags); | |
563 | if (uart->filemode == SERIAL_MODE_NOT_OPENED) | |
564 | snd_uart16550_do_open(uart); | |
565 | uart->filemode |= SERIAL_MODE_OUTPUT_OPEN; | |
566 | uart->midi_output[substream->number] = substream; | |
567 | spin_unlock_irqrestore(&uart->open_lock, flags); | |
568 | return 0; | |
569 | }; | |
570 | ||
4a4d2cfd | 571 | static int snd_uart16550_output_close(struct snd_rawmidi_substream *substream) |
1da177e4 LT |
572 | { |
573 | unsigned long flags; | |
0b830bac | 574 | struct snd_uart16550 *uart = substream->rmidi->private_data; |
1da177e4 LT |
575 | |
576 | spin_lock_irqsave(&uart->open_lock, flags); | |
577 | uart->filemode &= ~SERIAL_MODE_OUTPUT_OPEN; | |
578 | uart->midi_output[substream->number] = NULL; | |
579 | if (uart->filemode == SERIAL_MODE_NOT_OPENED) | |
580 | snd_uart16550_do_close(uart); | |
581 | spin_unlock_irqrestore(&uart->open_lock, flags); | |
582 | return 0; | |
583 | }; | |
584 | ||
0b830bac TI |
585 | static inline int snd_uart16550_buffer_can_write(struct snd_uart16550 *uart, |
586 | int Num) | |
1da177e4 | 587 | { |
0b830bac | 588 | if (uart->buff_in_count + Num < TX_BUFF_SIZE) |
1da177e4 LT |
589 | return 1; |
590 | else | |
591 | return 0; | |
592 | } | |
593 | ||
0b830bac TI |
594 | static inline int snd_uart16550_write_buffer(struct snd_uart16550 *uart, |
595 | unsigned char byte) | |
1da177e4 LT |
596 | { |
597 | unsigned short buff_in = uart->buff_in; | |
0b830bac | 598 | if (uart->buff_in_count < TX_BUFF_SIZE) { |
1da177e4 LT |
599 | uart->tx_buff[buff_in] = byte; |
600 | buff_in++; | |
601 | buff_in &= TX_BUFF_MASK; | |
602 | uart->buff_in = buff_in; | |
603 | uart->buff_in_count++; | |
604 | if (uart->irq < 0) /* polling mode */ | |
605 | snd_uart16550_add_timer(uart); | |
606 | return 1; | |
607 | } else | |
608 | return 0; | |
609 | } | |
610 | ||
0b830bac TI |
611 | static int snd_uart16550_output_byte(struct snd_uart16550 *uart, |
612 | struct snd_rawmidi_substream *substream, | |
613 | unsigned char midi_byte) | |
1da177e4 | 614 | { |
0b830bac | 615 | if (uart->buff_in_count == 0 /* Buffer empty? */ |
1da177e4 LT |
616 | && ((uart->adaptor != SNDRV_SERIAL_MS124W_SA && |
617 | uart->adaptor != SNDRV_SERIAL_GENERIC) || | |
0b830bac | 618 | (uart->fifo_count == 0 /* FIFO empty? */ |
1da177e4 LT |
619 | && (inb(uart->base + UART_MSR) & UART_MSR_CTS)))) { /* CTS? */ |
620 | ||
621 | /* Tx Buffer Empty - try to write immediately */ | |
622 | if ((inb(uart->base + UART_LSR) & UART_LSR_THRE) != 0) { | |
623 | /* Transmitter holding register (and Tx FIFO) empty */ | |
624 | uart->fifo_count = 1; | |
625 | outb(midi_byte, uart->base + UART_TX); | |
626 | } else { | |
627 | if (uart->fifo_count < uart->fifo_limit) { | |
628 | uart->fifo_count++; | |
629 | outb(midi_byte, uart->base + UART_TX); | |
630 | } else { | |
0b830bac TI |
631 | /* Cannot write (buffer empty) - |
632 | * put char in buffer */ | |
1da177e4 LT |
633 | snd_uart16550_write_buffer(uart, midi_byte); |
634 | } | |
635 | } | |
636 | } else { | |
0b830bac | 637 | if (!snd_uart16550_write_buffer(uart, midi_byte)) { |
45203832 TI |
638 | snd_printk(KERN_WARNING |
639 | "%s: Buffer overrun on device at 0x%lx\n", | |
1da177e4 LT |
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 | ||
fbbb01a1 BP |
784 | static int snd_uart16550_create(struct snd_card *card, |
785 | unsigned long iobase, | |
786 | int irq, | |
787 | unsigned int speed, | |
788 | unsigned int base, | |
789 | int adaptor, | |
790 | int droponfull, | |
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, | |
88e24c3a | 817 | 0, "Serial MIDI", uart)) { |
45203832 TI |
818 | snd_printk(KERN_WARNING |
819 | "irq %d busy. Using Polling.\n", irq); | |
1da177e4 LT |
820 | } else { |
821 | uart->irq = irq; | |
822 | } | |
823 | } | |
824 | uart->divisor = base / speed; | |
825 | uart->speed = base / (unsigned int)uart->divisor; | |
826 | uart->speed_base = base; | |
827 | uart->prev_out = -1; | |
828 | uart->prev_in = 0; | |
829 | uart->rstatus = 0; | |
830 | memset(uart->prev_status, 0x80, sizeof(unsigned char) * SNDRV_SERIAL_MAX_OUTS); | |
d80d05fc TI |
831 | setup_timer(&uart->buffer_timer, snd_uart16550_buffer_timer, |
832 | (unsigned long)uart); | |
1da177e4 LT |
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 | ||
fbbb01a1 | 863 | static void 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 | ||
fbbb01a1 BP |
872 | static int snd_uart16550_rmidi(struct snd_uart16550 *uart, int device, |
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 | ||
fbbb01a1 | 899 | static int 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: | |
45203832 TI |
922 | snd_printk(KERN_ERR |
923 | "Adaptor type is out of range 0-%d (%d)\n", | |
1da177e4 LT |
924 | SNDRV_SERIAL_MAX_ADAPTOR, adaptor[dev]); |
925 | return -ENODEV; | |
926 | } | |
927 | ||
928 | if (outs[dev] < 1 || outs[dev] > SNDRV_SERIAL_MAX_OUTS) { | |
45203832 TI |
929 | snd_printk(KERN_ERR |
930 | "Count of outputs is out of range 1-%d (%d)\n", | |
1da177e4 LT |
931 | SNDRV_SERIAL_MAX_OUTS, outs[dev]); |
932 | return -ENODEV; | |
933 | } | |
934 | ||
935 | if (ins[dev] < 1 || ins[dev] > SNDRV_SERIAL_MAX_INS) { | |
45203832 TI |
936 | snd_printk(KERN_ERR |
937 | "Count of inputs is out of range 1-%d (%d)\n", | |
1da177e4 LT |
938 | SNDRV_SERIAL_MAX_INS, ins[dev]); |
939 | return -ENODEV; | |
940 | } | |
941 | ||
5872f3f6 TI |
942 | err = snd_card_new(&devptr->dev, index[dev], id[dev], THIS_MODULE, |
943 | 0, &card); | |
bd7dd77c TI |
944 | if (err < 0) |
945 | return err; | |
1da177e4 LT |
946 | |
947 | strcpy(card->driver, "Serial"); | |
948 | strcpy(card->shortname, "Serial MIDI (UART16550A)"); | |
949 | ||
950 | if ((err = snd_uart16550_create(card, | |
951 | port[dev], | |
952 | irq[dev], | |
953 | speed[dev], | |
954 | base[dev], | |
955 | adaptor[dev], | |
956 | droponfull[dev], | |
16dab54b TI |
957 | &uart)) < 0) |
958 | goto _err; | |
1da177e4 | 959 | |
0b830bac TI |
960 | err = snd_uart16550_rmidi(uart, 0, outs[dev], ins[dev], &uart->rmidi); |
961 | if (err < 0) | |
16dab54b | 962 | goto _err; |
1da177e4 | 963 | |
bd0185ce | 964 | sprintf(card->longname, "%s [%s] at %#lx, irq %d", |
1da177e4 | 965 | card->shortname, |
1da177e4 | 966 | adaptor_names[uart->adaptor], |
bd0185ce CL |
967 | uart->base, |
968 | uart->irq); | |
1da177e4 | 969 | |
16dab54b TI |
970 | if ((err = snd_card_register(card)) < 0) |
971 | goto _err; | |
972 | ||
9caf6b59 | 973 | platform_set_drvdata(devptr, card); |
1da177e4 | 974 | return 0; |
16dab54b TI |
975 | |
976 | _err: | |
977 | snd_card_free(card); | |
978 | return err; | |
1da177e4 LT |
979 | } |
980 | ||
fbbb01a1 | 981 | static int snd_serial_remove(struct platform_device *devptr) |
9caf6b59 TI |
982 | { |
983 | snd_card_free(platform_get_drvdata(devptr)); | |
9caf6b59 TI |
984 | return 0; |
985 | } | |
986 | ||
987 | #define SND_SERIAL_DRIVER "snd_serial_u16550" | |
988 | ||
989 | static struct platform_driver snd_serial_driver = { | |
990 | .probe = snd_serial_probe, | |
fbbb01a1 | 991 | .remove = snd_serial_remove, |
9caf6b59 | 992 | .driver = { |
8bf01d8a | 993 | .name = SND_SERIAL_DRIVER, |
9caf6b59 TI |
994 | }, |
995 | }; | |
996 | ||
bdec0c72 | 997 | static void snd_serial_unregister_all(void) |
f7a9275d CL |
998 | { |
999 | int i; | |
1000 | ||
1001 | for (i = 0; i < ARRAY_SIZE(devices); ++i) | |
1002 | platform_device_unregister(devices[i]); | |
1003 | platform_driver_unregister(&snd_serial_driver); | |
1004 | } | |
1005 | ||
1da177e4 LT |
1006 | static int __init alsa_card_serial_init(void) |
1007 | { | |
9caf6b59 | 1008 | int i, cards, err; |
1da177e4 | 1009 | |
9caf6b59 TI |
1010 | if ((err = platform_driver_register(&snd_serial_driver)) < 0) |
1011 | return err; | |
1da177e4 | 1012 | |
9caf6b59 | 1013 | cards = 0; |
8278ca8f | 1014 | for (i = 0; i < SNDRV_CARDS; i++) { |
9caf6b59 | 1015 | struct platform_device *device; |
8278ca8f TI |
1016 | if (! enable[i]) |
1017 | continue; | |
9caf6b59 TI |
1018 | device = platform_device_register_simple(SND_SERIAL_DRIVER, |
1019 | i, NULL, 0); | |
a182ee98 RH |
1020 | if (IS_ERR(device)) |
1021 | continue; | |
7152447d RH |
1022 | if (!platform_get_drvdata(device)) { |
1023 | platform_device_unregister(device); | |
1024 | continue; | |
1025 | } | |
f7a9275d | 1026 | devices[i] = device; |
9caf6b59 TI |
1027 | cards++; |
1028 | } | |
1029 | if (! cards) { | |
1da177e4 LT |
1030 | #ifdef MODULE |
1031 | printk(KERN_ERR "serial midi soundcard not found or device busy\n"); | |
1032 | #endif | |
a182ee98 RH |
1033 | snd_serial_unregister_all(); |
1034 | return -ENODEV; | |
1da177e4 LT |
1035 | } |
1036 | return 0; | |
1037 | } | |
1038 | ||
1039 | static void __exit alsa_card_serial_exit(void) | |
1040 | { | |
f7a9275d | 1041 | snd_serial_unregister_all(); |
1da177e4 LT |
1042 | } |
1043 | ||
1044 | module_init(alsa_card_serial_init) | |
1045 | module_exit(alsa_card_serial_exit) |