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1a59d1b8 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * serial.c | |
c1017a4c | 4 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz>, |
1da177e4 LT |
5 | * Isaku Yamahata <yamahata@private.email.ne.jp>, |
6 | * George Hansper <ghansper@apana.org.au>, | |
7 | * Hannu Savolainen | |
8 | * | |
9 | * This code is based on the code from ALSA 0.5.9, but heavily rewritten. | |
10 | * | |
1da177e4 LT |
11 | * Sat Mar 31 17:27:57 PST 2001 tim.mann@compaq.com |
12 | * Added support for the Midiator MS-124T and for the MS-124W in | |
13 | * Single Addressed (S/A) or Multiple Burst (M/B) mode, with | |
14 | * power derived either parasitically from the serial port or | |
15 | * from a separate power supply. | |
16 | * | |
17 | * More documentation can be found in serial-u16550.txt. | |
18 | */ | |
19 | ||
1da177e4 LT |
20 | #include <linux/init.h> |
21 | #include <linux/interrupt.h> | |
9caf6b59 TI |
22 | #include <linux/err.h> |
23 | #include <linux/platform_device.h> | |
1da177e4 LT |
24 | #include <linux/slab.h> |
25 | #include <linux/ioport.h> | |
65a77217 | 26 | #include <linux/module.h> |
6cbbfe1c | 27 | #include <linux/io.h> |
1da177e4 LT |
28 | #include <sound/core.h> |
29 | #include <sound/rawmidi.h> | |
30 | #include <sound/initval.h> | |
31 | ||
32 | #include <linux/serial_reg.h> | |
f11b7992 | 33 | #include <linux/jiffies.h> |
1da177e4 | 34 | |
1da177e4 LT |
35 | MODULE_DESCRIPTION("MIDI serial u16550"); |
36 | MODULE_LICENSE("GPL"); | |
37 | MODULE_SUPPORTED_DEVICE("{{ALSA, MIDI serial u16550}}"); | |
38 | ||
39 | #define SNDRV_SERIAL_SOUNDCANVAS 0 /* Roland Soundcanvas; F5 NN selects part */ | |
40 | #define SNDRV_SERIAL_MS124T 1 /* Midiator MS-124T */ | |
41 | #define SNDRV_SERIAL_MS124W_SA 2 /* Midiator MS-124W in S/A mode */ | |
42 | #define SNDRV_SERIAL_MS124W_MB 3 /* Midiator MS-124W in M/B mode */ | |
43 | #define SNDRV_SERIAL_GENERIC 4 /* Generic Interface */ | |
44 | #define SNDRV_SERIAL_MAX_ADAPTOR SNDRV_SERIAL_GENERIC | |
45 | static char *adaptor_names[] = { | |
46 | "Soundcanvas", | |
47 | "MS-124T", | |
48 | "MS-124W S/A", | |
49 | "MS-124W M/B", | |
50 | "Generic" | |
51 | }; | |
52 | ||
53 | #define SNDRV_SERIAL_NORMALBUFF 0 /* Normal blocking buffer operation */ | |
54 | #define SNDRV_SERIAL_DROPBUFF 1 /* Non-blocking discard operation */ | |
55 | ||
56 | static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */ | |
57 | static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */ | |
a67ff6a5 | 58 | static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE; /* Enable this card */ |
1da177e4 LT |
59 | static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT; /* 0x3f8,0x2f8,0x3e8,0x2e8 */ |
60 | static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ; /* 3,4,5,7,9,10,11,14,15 */ | |
61 | static int speed[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 38400}; /* 9600,19200,38400,57600,115200 */ | |
62 | static int base[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 115200}; /* baud base */ | |
63 | static int outs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1}; /* 1 to 16 */ | |
64 | static int ins[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1}; /* 1 to 16 */ | |
65 | static int adaptor[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = SNDRV_SERIAL_SOUNDCANVAS}; | |
a67ff6a5 | 66 | static bool droponfull[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS -1)] = SNDRV_SERIAL_NORMALBUFF }; |
1da177e4 LT |
67 | |
68 | module_param_array(index, int, NULL, 0444); | |
69 | MODULE_PARM_DESC(index, "Index value for Serial MIDI."); | |
70 | module_param_array(id, charp, NULL, 0444); | |
71 | MODULE_PARM_DESC(id, "ID string for Serial MIDI."); | |
72 | module_param_array(enable, bool, NULL, 0444); | |
73 | MODULE_PARM_DESC(enable, "Enable UART16550A chip."); | |
b11ce420 | 74 | module_param_hw_array(port, long, ioport, NULL, 0444); |
1da177e4 | 75 | MODULE_PARM_DESC(port, "Port # for UART16550A chip."); |
b11ce420 | 76 | module_param_hw_array(irq, int, irq, NULL, 0444); |
1da177e4 LT |
77 | MODULE_PARM_DESC(irq, "IRQ # for UART16550A chip."); |
78 | module_param_array(speed, int, NULL, 0444); | |
79 | MODULE_PARM_DESC(speed, "Speed in bauds."); | |
80 | module_param_array(base, int, NULL, 0444); | |
81 | MODULE_PARM_DESC(base, "Base for divisor in bauds."); | |
82 | module_param_array(outs, int, NULL, 0444); | |
83 | MODULE_PARM_DESC(outs, "Number of MIDI outputs."); | |
84 | module_param_array(ins, int, NULL, 0444); | |
85 | MODULE_PARM_DESC(ins, "Number of MIDI inputs."); | |
86 | module_param_array(droponfull, bool, NULL, 0444); | |
87 | MODULE_PARM_DESC(droponfull, "Flag to enable drop-on-full buffer mode"); | |
88 | ||
89 | module_param_array(adaptor, int, NULL, 0444); | |
90 | MODULE_PARM_DESC(adaptor, "Type of adaptor."); | |
91 | ||
92 | /*#define SNDRV_SERIAL_MS124W_MB_NOCOMBO 1*/ /* Address outs as 0-3 instead of bitmap */ | |
93 | ||
94 | #define SNDRV_SERIAL_MAX_OUTS 16 /* max 64, min 16 */ | |
95 | #define SNDRV_SERIAL_MAX_INS 16 /* max 64, min 16 */ | |
96 | ||
97 | #define TX_BUFF_SIZE (1<<15) /* Must be 2^n */ | |
98 | #define TX_BUFF_MASK (TX_BUFF_SIZE - 1) | |
99 | ||
100 | #define SERIAL_MODE_NOT_OPENED (0) | |
101 | #define SERIAL_MODE_INPUT_OPEN (1 << 0) | |
102 | #define SERIAL_MODE_OUTPUT_OPEN (1 << 1) | |
103 | #define SERIAL_MODE_INPUT_TRIGGERED (1 << 2) | |
104 | #define SERIAL_MODE_OUTPUT_TRIGGERED (1 << 3) | |
105 | ||
0b830bac | 106 | struct snd_uart16550 { |
4a4d2cfd TI |
107 | struct snd_card *card; |
108 | struct snd_rawmidi *rmidi; | |
109 | struct snd_rawmidi_substream *midi_output[SNDRV_SERIAL_MAX_OUTS]; | |
110 | struct snd_rawmidi_substream *midi_input[SNDRV_SERIAL_MAX_INS]; | |
1da177e4 | 111 | |
0b830bac | 112 | int filemode; /* open status of file */ |
1da177e4 LT |
113 | |
114 | spinlock_t open_lock; | |
115 | ||
116 | int irq; | |
117 | ||
118 | unsigned long base; | |
119 | struct resource *res_base; | |
120 | ||
121 | unsigned int speed; | |
122 | unsigned int speed_base; | |
123 | unsigned char divisor; | |
124 | ||
125 | unsigned char old_divisor_lsb; | |
126 | unsigned char old_divisor_msb; | |
127 | unsigned char old_line_ctrl_reg; | |
128 | ||
0b830bac TI |
129 | /* parameter for using of write loop */ |
130 | short int fifo_limit; /* used in uart16550 */ | |
131 | short int fifo_count; /* used in uart16550 */ | |
1da177e4 | 132 | |
0b830bac | 133 | /* type of adaptor */ |
1da177e4 LT |
134 | int adaptor; |
135 | ||
0b830bac | 136 | /* inputs */ |
1da177e4 LT |
137 | int prev_in; |
138 | unsigned char rstatus; | |
139 | ||
0b830bac | 140 | /* outputs */ |
1da177e4 LT |
141 | int prev_out; |
142 | unsigned char prev_status[SNDRV_SERIAL_MAX_OUTS]; | |
143 | ||
0b830bac | 144 | /* write buffer and its writing/reading position */ |
1da177e4 LT |
145 | unsigned char tx_buff[TX_BUFF_SIZE]; |
146 | int buff_in_count; | |
147 | int buff_in; | |
148 | int buff_out; | |
149 | int drop_on_full; | |
150 | ||
0b830bac | 151 | /* wait timer */ |
1da177e4 LT |
152 | unsigned int timer_running:1; |
153 | struct timer_list buffer_timer; | |
154 | ||
0b830bac | 155 | }; |
1da177e4 | 156 | |
f7a9275d CL |
157 | static struct platform_device *devices[SNDRV_CARDS]; |
158 | ||
0b830bac | 159 | static inline void snd_uart16550_add_timer(struct snd_uart16550 *uart) |
1da177e4 | 160 | { |
0b830bac | 161 | if (!uart->timer_running) { |
1da177e4 | 162 | /* timer 38600bps * 10bit * 16byte */ |
d80d05fc | 163 | mod_timer(&uart->buffer_timer, jiffies + (HZ + 255) / 256); |
1da177e4 | 164 | uart->timer_running = 1; |
1da177e4 LT |
165 | } |
166 | } | |
167 | ||
0b830bac | 168 | static inline void snd_uart16550_del_timer(struct snd_uart16550 *uart) |
1da177e4 LT |
169 | { |
170 | if (uart->timer_running) { | |
171 | del_timer(&uart->buffer_timer); | |
172 | uart->timer_running = 0; | |
173 | } | |
174 | } | |
175 | ||
176 | /* This macro is only used in snd_uart16550_io_loop */ | |
0b830bac | 177 | static inline void snd_uart16550_buffer_output(struct snd_uart16550 *uart) |
1da177e4 LT |
178 | { |
179 | unsigned short buff_out = uart->buff_out; | |
0b830bac | 180 | if (uart->buff_in_count > 0) { |
1da177e4 LT |
181 | outb(uart->tx_buff[buff_out], uart->base + UART_TX); |
182 | uart->fifo_count++; | |
183 | buff_out++; | |
184 | buff_out &= TX_BUFF_MASK; | |
185 | uart->buff_out = buff_out; | |
186 | uart->buff_in_count--; | |
187 | } | |
188 | } | |
189 | ||
190 | /* This loop should be called with interrupts disabled | |
191 | * We don't want to interrupt this, | |
192 | * as we're already handling an interrupt | |
193 | */ | |
0b830bac | 194 | static void snd_uart16550_io_loop(struct snd_uart16550 * uart) |
1da177e4 LT |
195 | { |
196 | unsigned char c, status; | |
197 | int substream; | |
198 | ||
199 | /* recall previous stream */ | |
200 | substream = uart->prev_in; | |
201 | ||
202 | /* Read Loop */ | |
203 | while ((status = inb(uart->base + UART_LSR)) & UART_LSR_DR) { | |
204 | /* while receive data ready */ | |
205 | c = inb(uart->base + UART_RX); | |
206 | ||
207 | /* keep track of last status byte */ | |
0b830bac | 208 | if (c & 0x80) |
1da177e4 | 209 | uart->rstatus = c; |
1da177e4 LT |
210 | |
211 | /* handle stream switch */ | |
212 | if (uart->adaptor == SNDRV_SERIAL_GENERIC) { | |
213 | if (uart->rstatus == 0xf5) { | |
214 | if (c <= SNDRV_SERIAL_MAX_INS && c > 0) | |
215 | substream = c - 1; | |
216 | if (c != 0xf5) | |
0b830bac TI |
217 | /* prevent future bytes from being |
218 | interpreted as streams */ | |
219 | uart->rstatus = 0; | |
220 | } else if ((uart->filemode & SERIAL_MODE_INPUT_OPEN) | |
221 | && uart->midi_input[substream]) | |
222 | snd_rawmidi_receive(uart->midi_input[substream], | |
223 | &c, 1); | |
224 | } else if ((uart->filemode & SERIAL_MODE_INPUT_OPEN) && | |
225 | uart->midi_input[substream]) | |
1da177e4 | 226 | snd_rawmidi_receive(uart->midi_input[substream], &c, 1); |
1da177e4 LT |
227 | |
228 | if (status & UART_LSR_OE) | |
45203832 TI |
229 | snd_printk(KERN_WARNING |
230 | "%s: Overrun on device at 0x%lx\n", | |
1da177e4 LT |
231 | uart->rmidi->name, uart->base); |
232 | } | |
233 | ||
234 | /* remember the last stream */ | |
235 | uart->prev_in = substream; | |
236 | ||
237 | /* no need of check SERIAL_MODE_OUTPUT_OPEN because if not, | |
238 | buffer is never filled. */ | |
239 | /* Check write status */ | |
0b830bac | 240 | if (status & UART_LSR_THRE) |
1da177e4 | 241 | uart->fifo_count = 0; |
1da177e4 LT |
242 | if (uart->adaptor == SNDRV_SERIAL_MS124W_SA |
243 | || uart->adaptor == SNDRV_SERIAL_GENERIC) { | |
244 | /* Can't use FIFO, must send only when CTS is true */ | |
245 | status = inb(uart->base + UART_MSR); | |
0b830bac TI |
246 | while (uart->fifo_count == 0 && (status & UART_MSR_CTS) && |
247 | uart->buff_in_count > 0) { | |
1da177e4 | 248 | snd_uart16550_buffer_output(uart); |
0b830bac | 249 | status = inb(uart->base + UART_MSR); |
1da177e4 LT |
250 | } |
251 | } else { | |
252 | /* Write loop */ | |
0b830bac | 253 | while (uart->fifo_count < uart->fifo_limit /* Can we write ? */ |
1da177e4 LT |
254 | && uart->buff_in_count > 0) /* Do we want to? */ |
255 | snd_uart16550_buffer_output(uart); | |
256 | } | |
257 | if (uart->irq < 0 && uart->buff_in_count > 0) | |
258 | snd_uart16550_add_timer(uart); | |
259 | } | |
260 | ||
261 | /* NOTES ON SERVICING INTERUPTS | |
262 | * --------------------------- | |
263 | * After receiving a interrupt, it is important to indicate to the UART that | |
264 | * this has been done. | |
265 | * For a Rx interrupt, this is done by reading the received byte. | |
266 | * For a Tx interrupt this is done by either: | |
267 | * a) Writing a byte | |
268 | * b) Reading the IIR | |
269 | * It is particularly important to read the IIR if a Tx interrupt is received | |
270 | * when there is no data in tx_buff[], as in this case there no other | |
271 | * indication that the interrupt has been serviced, and it remains outstanding | |
272 | * indefinitely. This has the curious side effect that and no further interrupts | |
273 | * will be generated from this device AT ALL!!. | |
274 | * It is also desirable to clear outstanding interrupts when the device is | |
275 | * opened/closed. | |
276 | * | |
277 | * | |
278 | * Note that some devices need OUT2 to be set before they will generate | |
279 | * interrupts at all. (Possibly tied to an internal pull-up on CTS?) | |
280 | */ | |
7d12e780 | 281 | static irqreturn_t snd_uart16550_interrupt(int irq, void *dev_id) |
1da177e4 | 282 | { |
0b830bac | 283 | struct snd_uart16550 *uart; |
1da177e4 | 284 | |
0b830bac | 285 | uart = dev_id; |
1da177e4 LT |
286 | spin_lock(&uart->open_lock); |
287 | if (uart->filemode == SERIAL_MODE_NOT_OPENED) { | |
288 | spin_unlock(&uart->open_lock); | |
289 | return IRQ_NONE; | |
290 | } | |
0b830bac TI |
291 | /* indicate to the UART that the interrupt has been serviced */ |
292 | inb(uart->base + UART_IIR); | |
1da177e4 LT |
293 | snd_uart16550_io_loop(uart); |
294 | spin_unlock(&uart->open_lock); | |
295 | return IRQ_HANDLED; | |
296 | } | |
297 | ||
298 | /* When the polling mode, this function calls snd_uart16550_io_loop. */ | |
bc47ba90 | 299 | static void snd_uart16550_buffer_timer(struct timer_list *t) |
1da177e4 LT |
300 | { |
301 | unsigned long flags; | |
0b830bac | 302 | struct snd_uart16550 *uart; |
1da177e4 | 303 | |
bc47ba90 | 304 | uart = from_timer(uart, t, buffer_timer); |
1da177e4 LT |
305 | spin_lock_irqsave(&uart->open_lock, flags); |
306 | snd_uart16550_del_timer(uart); | |
307 | snd_uart16550_io_loop(uart); | |
308 | spin_unlock_irqrestore(&uart->open_lock, flags); | |
309 | } | |
310 | ||
311 | /* | |
312 | * this method probes, if an uart sits on given port | |
313 | * return 0 if found | |
314 | * return negative error if not found | |
315 | */ | |
fbbb01a1 | 316 | static int snd_uart16550_detect(struct snd_uart16550 *uart) |
1da177e4 LT |
317 | { |
318 | unsigned long io_base = uart->base; | |
319 | int ok; | |
320 | unsigned char c; | |
321 | ||
322 | /* Do some vague tests for the presence of the uart */ | |
323 | if (io_base == 0 || io_base == SNDRV_AUTO_PORT) { | |
324 | return -ENODEV; /* Not configured */ | |
325 | } | |
326 | ||
327 | uart->res_base = request_region(io_base, 8, "Serial MIDI"); | |
328 | if (uart->res_base == NULL) { | |
329 | snd_printk(KERN_ERR "u16550: can't grab port 0x%lx\n", io_base); | |
330 | return -EBUSY; | |
331 | } | |
332 | ||
0b830bac TI |
333 | /* uart detected unless one of the following tests should fail */ |
334 | ok = 1; | |
1da177e4 LT |
335 | /* 8 data-bits, 1 stop-bit, parity off, DLAB = 0 */ |
336 | outb(UART_LCR_WLEN8, io_base + UART_LCR); /* Line Control Register */ | |
337 | c = inb(io_base + UART_IER); | |
338 | /* The top four bits of the IER should always == 0 */ | |
339 | if ((c & 0xf0) != 0) | |
340 | ok = 0; /* failed */ | |
341 | ||
342 | outb(0xaa, io_base + UART_SCR); | |
343 | /* Write arbitrary data into the scratch reg */ | |
344 | c = inb(io_base + UART_SCR); | |
345 | /* If it comes back, it's OK */ | |
346 | if (c != 0xaa) | |
347 | ok = 0; /* failed */ | |
348 | ||
349 | outb(0x55, io_base + UART_SCR); | |
350 | /* Write arbitrary data into the scratch reg */ | |
351 | c = inb(io_base + UART_SCR); | |
352 | /* If it comes back, it's OK */ | |
353 | if (c != 0x55) | |
354 | ok = 0; /* failed */ | |
355 | ||
356 | return ok; | |
357 | } | |
358 | ||
0b830bac | 359 | static void snd_uart16550_do_open(struct snd_uart16550 * uart) |
1da177e4 LT |
360 | { |
361 | char byte; | |
362 | ||
363 | /* Initialize basic variables */ | |
364 | uart->buff_in_count = 0; | |
365 | uart->buff_in = 0; | |
366 | uart->buff_out = 0; | |
367 | uart->fifo_limit = 1; | |
368 | uart->fifo_count = 0; | |
369 | uart->timer_running = 0; | |
370 | ||
371 | outb(UART_FCR_ENABLE_FIFO /* Enable FIFO's (if available) */ | |
372 | | UART_FCR_CLEAR_RCVR /* Clear receiver FIFO */ | |
373 | | UART_FCR_CLEAR_XMIT /* Clear transmitter FIFO */ | |
374 | | UART_FCR_TRIGGER_4 /* Set FIFO trigger at 4-bytes */ | |
375 | /* NOTE: interrupt generated after T=(time)4-bytes | |
376 | * if less than UART_FCR_TRIGGER bytes received | |
377 | */ | |
378 | ,uart->base + UART_FCR); /* FIFO Control Register */ | |
379 | ||
380 | if ((inb(uart->base + UART_IIR) & 0xf0) == 0xc0) | |
381 | uart->fifo_limit = 16; | |
382 | if (uart->divisor != 0) { | |
383 | uart->old_line_ctrl_reg = inb(uart->base + UART_LCR); | |
384 | outb(UART_LCR_DLAB /* Divisor latch access bit */ | |
385 | ,uart->base + UART_LCR); /* Line Control Register */ | |
386 | uart->old_divisor_lsb = inb(uart->base + UART_DLL); | |
387 | uart->old_divisor_msb = inb(uart->base + UART_DLM); | |
388 | ||
389 | outb(uart->divisor | |
390 | ,uart->base + UART_DLL); /* Divisor Latch Low */ | |
391 | outb(0 | |
392 | ,uart->base + UART_DLM); /* Divisor Latch High */ | |
393 | /* DLAB is reset to 0 in next outb() */ | |
394 | } | |
395 | /* Set serial parameters (parity off, etc) */ | |
396 | outb(UART_LCR_WLEN8 /* 8 data-bits */ | |
397 | | 0 /* 1 stop-bit */ | |
398 | | 0 /* parity off */ | |
399 | | 0 /* DLAB = 0 */ | |
400 | ,uart->base + UART_LCR); /* Line Control Register */ | |
401 | ||
402 | switch (uart->adaptor) { | |
403 | default: | |
404 | outb(UART_MCR_RTS /* Set Request-To-Send line active */ | |
405 | | UART_MCR_DTR /* Set Data-Terminal-Ready line active */ | |
406 | | UART_MCR_OUT2 /* Set OUT2 - not always required, but when | |
407 | * it is, it is ESSENTIAL for enabling interrupts | |
408 | */ | |
409 | ,uart->base + UART_MCR); /* Modem Control Register */ | |
410 | break; | |
411 | case SNDRV_SERIAL_MS124W_SA: | |
412 | case SNDRV_SERIAL_MS124W_MB: | |
413 | /* MS-124W can draw power from RTS and DTR if they | |
414 | are in opposite states. */ | |
415 | outb(UART_MCR_RTS | (0&UART_MCR_DTR) | UART_MCR_OUT2, | |
416 | uart->base + UART_MCR); | |
417 | break; | |
418 | case SNDRV_SERIAL_MS124T: | |
419 | /* MS-124T can draw power from RTS and/or DTR (preferably | |
420 | both) if they are both asserted. */ | |
421 | outb(UART_MCR_RTS | UART_MCR_DTR | UART_MCR_OUT2, | |
422 | uart->base + UART_MCR); | |
423 | break; | |
424 | } | |
425 | ||
426 | if (uart->irq < 0) { | |
427 | byte = (0 & UART_IER_RDI) /* Disable Receiver data interrupt */ | |
428 | |(0 & UART_IER_THRI) /* Disable Transmitter holding register empty interrupt */ | |
429 | ; | |
430 | } else if (uart->adaptor == SNDRV_SERIAL_MS124W_SA) { | |
431 | byte = UART_IER_RDI /* Enable Receiver data interrupt */ | |
432 | | UART_IER_MSI /* Enable Modem status interrupt */ | |
433 | ; | |
434 | } else if (uart->adaptor == SNDRV_SERIAL_GENERIC) { | |
435 | byte = UART_IER_RDI /* Enable Receiver data interrupt */ | |
436 | | UART_IER_MSI /* Enable Modem status interrupt */ | |
437 | | UART_IER_THRI /* Enable Transmitter holding register empty interrupt */ | |
438 | ; | |
439 | } else { | |
440 | byte = UART_IER_RDI /* Enable Receiver data interrupt */ | |
441 | | UART_IER_THRI /* Enable Transmitter holding register empty interrupt */ | |
442 | ; | |
443 | } | |
561de31a | 444 | outb(byte, uart->base + UART_IER); /* Interrupt enable Register */ |
1da177e4 LT |
445 | |
446 | inb(uart->base + UART_LSR); /* Clear any pre-existing overrun indication */ | |
447 | inb(uart->base + UART_IIR); /* Clear any pre-existing transmit interrupt */ | |
448 | inb(uart->base + UART_RX); /* Clear any pre-existing receive interrupt */ | |
449 | } | |
450 | ||
0b830bac | 451 | static void snd_uart16550_do_close(struct snd_uart16550 * uart) |
1da177e4 LT |
452 | { |
453 | if (uart->irq < 0) | |
454 | snd_uart16550_del_timer(uart); | |
455 | ||
456 | /* NOTE: may need to disable interrupts before de-registering out handler. | |
457 | * For now, the consequences are harmless. | |
458 | */ | |
459 | ||
460 | outb((0 & UART_IER_RDI) /* Disable Receiver data interrupt */ | |
461 | |(0 & UART_IER_THRI) /* Disable Transmitter holding register empty interrupt */ | |
561de31a | 462 | ,uart->base + UART_IER); /* Interrupt enable Register */ |
1da177e4 LT |
463 | |
464 | switch (uart->adaptor) { | |
465 | default: | |
466 | outb((0 & UART_MCR_RTS) /* Deactivate Request-To-Send line */ | |
467 | |(0 & UART_MCR_DTR) /* Deactivate Data-Terminal-Ready line */ | |
468 | |(0 & UART_MCR_OUT2) /* Deactivate OUT2 */ | |
469 | ,uart->base + UART_MCR); /* Modem Control Register */ | |
470 | break; | |
471 | case SNDRV_SERIAL_MS124W_SA: | |
472 | case SNDRV_SERIAL_MS124W_MB: | |
473 | /* MS-124W can draw power from RTS and DTR if they | |
474 | are in opposite states; leave it powered. */ | |
475 | outb(UART_MCR_RTS | (0&UART_MCR_DTR) | (0&UART_MCR_OUT2), | |
476 | uart->base + UART_MCR); | |
477 | break; | |
478 | case SNDRV_SERIAL_MS124T: | |
479 | /* MS-124T can draw power from RTS and/or DTR (preferably | |
480 | both) if they are both asserted; leave it powered. */ | |
481 | outb(UART_MCR_RTS | UART_MCR_DTR | (0&UART_MCR_OUT2), | |
482 | uart->base + UART_MCR); | |
483 | break; | |
484 | } | |
485 | ||
486 | inb(uart->base + UART_IIR); /* Clear any outstanding interrupts */ | |
487 | ||
488 | /* Restore old divisor */ | |
489 | if (uart->divisor != 0) { | |
490 | outb(UART_LCR_DLAB /* Divisor latch access bit */ | |
491 | ,uart->base + UART_LCR); /* Line Control Register */ | |
492 | outb(uart->old_divisor_lsb | |
493 | ,uart->base + UART_DLL); /* Divisor Latch Low */ | |
494 | outb(uart->old_divisor_msb | |
495 | ,uart->base + UART_DLM); /* Divisor Latch High */ | |
496 | /* Restore old LCR (data bits, stop bits, parity, DLAB) */ | |
497 | outb(uart->old_line_ctrl_reg | |
498 | ,uart->base + UART_LCR); /* Line Control Register */ | |
499 | } | |
500 | } | |
501 | ||
4a4d2cfd | 502 | static int snd_uart16550_input_open(struct snd_rawmidi_substream *substream) |
1da177e4 LT |
503 | { |
504 | unsigned long flags; | |
0b830bac | 505 | struct snd_uart16550 *uart = substream->rmidi->private_data; |
1da177e4 LT |
506 | |
507 | spin_lock_irqsave(&uart->open_lock, flags); | |
508 | if (uart->filemode == SERIAL_MODE_NOT_OPENED) | |
509 | snd_uart16550_do_open(uart); | |
510 | uart->filemode |= SERIAL_MODE_INPUT_OPEN; | |
511 | uart->midi_input[substream->number] = substream; | |
512 | spin_unlock_irqrestore(&uart->open_lock, flags); | |
513 | return 0; | |
514 | } | |
515 | ||
4a4d2cfd | 516 | static int snd_uart16550_input_close(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 | uart->filemode &= ~SERIAL_MODE_INPUT_OPEN; | |
523 | uart->midi_input[substream->number] = NULL; | |
524 | if (uart->filemode == SERIAL_MODE_NOT_OPENED) | |
525 | snd_uart16550_do_close(uart); | |
526 | spin_unlock_irqrestore(&uart->open_lock, flags); | |
527 | return 0; | |
528 | } | |
529 | ||
0b830bac TI |
530 | static void snd_uart16550_input_trigger(struct snd_rawmidi_substream *substream, |
531 | int up) | |
1da177e4 LT |
532 | { |
533 | unsigned long flags; | |
0b830bac | 534 | struct snd_uart16550 *uart = substream->rmidi->private_data; |
1da177e4 LT |
535 | |
536 | spin_lock_irqsave(&uart->open_lock, flags); | |
0b830bac | 537 | if (up) |
1da177e4 | 538 | uart->filemode |= SERIAL_MODE_INPUT_TRIGGERED; |
0b830bac | 539 | else |
1da177e4 | 540 | uart->filemode &= ~SERIAL_MODE_INPUT_TRIGGERED; |
1da177e4 LT |
541 | spin_unlock_irqrestore(&uart->open_lock, flags); |
542 | } | |
543 | ||
4a4d2cfd | 544 | static int snd_uart16550_output_open(struct snd_rawmidi_substream *substream) |
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); | |
550 | if (uart->filemode == SERIAL_MODE_NOT_OPENED) | |
551 | snd_uart16550_do_open(uart); | |
552 | uart->filemode |= SERIAL_MODE_OUTPUT_OPEN; | |
553 | uart->midi_output[substream->number] = substream; | |
554 | spin_unlock_irqrestore(&uart->open_lock, flags); | |
555 | return 0; | |
556 | }; | |
557 | ||
4a4d2cfd | 558 | static int snd_uart16550_output_close(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 | uart->filemode &= ~SERIAL_MODE_OUTPUT_OPEN; | |
565 | uart->midi_output[substream->number] = NULL; | |
566 | if (uart->filemode == SERIAL_MODE_NOT_OPENED) | |
567 | snd_uart16550_do_close(uart); | |
568 | spin_unlock_irqrestore(&uart->open_lock, flags); | |
569 | return 0; | |
570 | }; | |
571 | ||
0b830bac TI |
572 | static inline int snd_uart16550_buffer_can_write(struct snd_uart16550 *uart, |
573 | int Num) | |
1da177e4 | 574 | { |
0b830bac | 575 | if (uart->buff_in_count + Num < TX_BUFF_SIZE) |
1da177e4 LT |
576 | return 1; |
577 | else | |
578 | return 0; | |
579 | } | |
580 | ||
0b830bac TI |
581 | static inline int snd_uart16550_write_buffer(struct snd_uart16550 *uart, |
582 | unsigned char byte) | |
1da177e4 LT |
583 | { |
584 | unsigned short buff_in = uart->buff_in; | |
0b830bac | 585 | if (uart->buff_in_count < TX_BUFF_SIZE) { |
1da177e4 LT |
586 | uart->tx_buff[buff_in] = byte; |
587 | buff_in++; | |
588 | buff_in &= TX_BUFF_MASK; | |
589 | uart->buff_in = buff_in; | |
590 | uart->buff_in_count++; | |
591 | if (uart->irq < 0) /* polling mode */ | |
592 | snd_uart16550_add_timer(uart); | |
593 | return 1; | |
594 | } else | |
595 | return 0; | |
596 | } | |
597 | ||
0b830bac TI |
598 | static int snd_uart16550_output_byte(struct snd_uart16550 *uart, |
599 | struct snd_rawmidi_substream *substream, | |
600 | unsigned char midi_byte) | |
1da177e4 | 601 | { |
0b830bac | 602 | if (uart->buff_in_count == 0 /* Buffer empty? */ |
1da177e4 LT |
603 | && ((uart->adaptor != SNDRV_SERIAL_MS124W_SA && |
604 | uart->adaptor != SNDRV_SERIAL_GENERIC) || | |
0b830bac | 605 | (uart->fifo_count == 0 /* FIFO empty? */ |
1da177e4 LT |
606 | && (inb(uart->base + UART_MSR) & UART_MSR_CTS)))) { /* CTS? */ |
607 | ||
608 | /* Tx Buffer Empty - try to write immediately */ | |
609 | if ((inb(uart->base + UART_LSR) & UART_LSR_THRE) != 0) { | |
610 | /* Transmitter holding register (and Tx FIFO) empty */ | |
611 | uart->fifo_count = 1; | |
612 | outb(midi_byte, uart->base + UART_TX); | |
613 | } else { | |
614 | if (uart->fifo_count < uart->fifo_limit) { | |
615 | uart->fifo_count++; | |
616 | outb(midi_byte, uart->base + UART_TX); | |
617 | } else { | |
0b830bac TI |
618 | /* Cannot write (buffer empty) - |
619 | * put char in buffer */ | |
1da177e4 LT |
620 | snd_uart16550_write_buffer(uart, midi_byte); |
621 | } | |
622 | } | |
623 | } else { | |
0b830bac | 624 | if (!snd_uart16550_write_buffer(uart, midi_byte)) { |
45203832 TI |
625 | snd_printk(KERN_WARNING |
626 | "%s: Buffer overrun on device at 0x%lx\n", | |
1da177e4 LT |
627 | uart->rmidi->name, uart->base); |
628 | return 0; | |
629 | } | |
630 | } | |
631 | ||
632 | return 1; | |
633 | } | |
634 | ||
4a4d2cfd | 635 | static void snd_uart16550_output_write(struct snd_rawmidi_substream *substream) |
1da177e4 LT |
636 | { |
637 | unsigned long flags; | |
638 | unsigned char midi_byte, addr_byte; | |
0b830bac | 639 | struct snd_uart16550 *uart = substream->rmidi->private_data; |
1da177e4 | 640 | char first; |
0b830bac | 641 | static unsigned long lasttime = 0; |
1da177e4 | 642 | |
561de31a | 643 | /* Interrupts are disabled during the updating of the tx_buff, |
1da177e4 LT |
644 | * since it is 'bad' to have two processes updating the same |
645 | * variables (ie buff_in & buff_out) | |
646 | */ | |
647 | ||
648 | spin_lock_irqsave(&uart->open_lock, flags); | |
649 | ||
0b830bac | 650 | if (uart->irq < 0) /* polling */ |
1da177e4 LT |
651 | snd_uart16550_io_loop(uart); |
652 | ||
653 | if (uart->adaptor == SNDRV_SERIAL_MS124W_MB) { | |
654 | while (1) { | |
655 | /* buffer full? */ | |
656 | /* in this mode we need two bytes of space */ | |
657 | if (uart->buff_in_count > TX_BUFF_SIZE - 2) | |
658 | break; | |
659 | if (snd_rawmidi_transmit(substream, &midi_byte, 1) != 1) | |
660 | break; | |
661 | #ifdef SNDRV_SERIAL_MS124W_MB_NOCOMBO | |
662 | /* select exactly one of the four ports */ | |
663 | addr_byte = (1 << (substream->number + 4)) | 0x08; | |
664 | #else | |
665 | /* select any combination of the four ports */ | |
666 | addr_byte = (substream->number << 4) | 0x08; | |
667 | /* ...except none */ | |
0b830bac TI |
668 | if (addr_byte == 0x08) |
669 | addr_byte = 0xf8; | |
1da177e4 LT |
670 | #endif |
671 | snd_uart16550_output_byte(uart, substream, addr_byte); | |
672 | /* send midi byte */ | |
673 | snd_uart16550_output_byte(uart, substream, midi_byte); | |
674 | } | |
675 | } else { | |
676 | first = 0; | |
0b830bac TI |
677 | while (snd_rawmidi_transmit_peek(substream, &midi_byte, 1) == 1) { |
678 | /* Also send F5 after 3 seconds with no data | |
679 | * to handle device disconnect */ | |
680 | if (first == 0 && | |
681 | (uart->adaptor == SNDRV_SERIAL_SOUNDCANVAS || | |
682 | uart->adaptor == SNDRV_SERIAL_GENERIC) && | |
683 | (uart->prev_out != substream->number || | |
f11b7992 | 684 | time_after(jiffies, lasttime + 3*HZ))) { |
0b830bac TI |
685 | |
686 | if (snd_uart16550_buffer_can_write(uart, 3)) { | |
1da177e4 | 687 | /* Roland Soundcanvas part selection */ |
0b830bac TI |
688 | /* If this substream of the data is |
689 | * different previous substream | |
690 | * in this uart, send the change part | |
691 | * event | |
692 | */ | |
1da177e4 LT |
693 | uart->prev_out = substream->number; |
694 | /* change part */ | |
0b830bac TI |
695 | snd_uart16550_output_byte(uart, substream, |
696 | 0xf5); | |
1da177e4 | 697 | /* data */ |
0b830bac TI |
698 | snd_uart16550_output_byte(uart, substream, |
699 | uart->prev_out + 1); | |
700 | /* If midi_byte is a data byte, | |
701 | * send the previous status byte */ | |
702 | if (midi_byte < 0x80 && | |
703 | uart->adaptor == SNDRV_SERIAL_SOUNDCANVAS) | |
1da177e4 | 704 | snd_uart16550_output_byte(uart, substream, uart->prev_status[uart->prev_out]); |
0b830bac | 705 | } else if (!uart->drop_on_full) |
1da177e4 LT |
706 | break; |
707 | ||
708 | } | |
709 | ||
710 | /* send midi byte */ | |
0b830bac TI |
711 | if (!snd_uart16550_output_byte(uart, substream, midi_byte) && |
712 | !uart->drop_on_full ) | |
1da177e4 LT |
713 | break; |
714 | ||
715 | if (midi_byte >= 0x80 && midi_byte < 0xf0) | |
716 | uart->prev_status[uart->prev_out] = midi_byte; | |
717 | first = 1; | |
718 | ||
719 | snd_rawmidi_transmit_ack( substream, 1 ); | |
720 | } | |
721 | lasttime = jiffies; | |
722 | } | |
723 | spin_unlock_irqrestore(&uart->open_lock, flags); | |
724 | } | |
725 | ||
0b830bac TI |
726 | static void snd_uart16550_output_trigger(struct snd_rawmidi_substream *substream, |
727 | int up) | |
1da177e4 LT |
728 | { |
729 | unsigned long flags; | |
0b830bac | 730 | struct snd_uart16550 *uart = substream->rmidi->private_data; |
1da177e4 LT |
731 | |
732 | spin_lock_irqsave(&uart->open_lock, flags); | |
0b830bac | 733 | if (up) |
1da177e4 | 734 | uart->filemode |= SERIAL_MODE_OUTPUT_TRIGGERED; |
0b830bac | 735 | else |
1da177e4 | 736 | uart->filemode &= ~SERIAL_MODE_OUTPUT_TRIGGERED; |
1da177e4 LT |
737 | spin_unlock_irqrestore(&uart->open_lock, flags); |
738 | if (up) | |
739 | snd_uart16550_output_write(substream); | |
740 | } | |
741 | ||
c36f486d | 742 | static const struct snd_rawmidi_ops snd_uart16550_output = |
1da177e4 LT |
743 | { |
744 | .open = snd_uart16550_output_open, | |
745 | .close = snd_uart16550_output_close, | |
746 | .trigger = snd_uart16550_output_trigger, | |
747 | }; | |
748 | ||
c36f486d | 749 | static const struct snd_rawmidi_ops snd_uart16550_input = |
1da177e4 LT |
750 | { |
751 | .open = snd_uart16550_input_open, | |
752 | .close = snd_uart16550_input_close, | |
753 | .trigger = snd_uart16550_input_trigger, | |
754 | }; | |
755 | ||
0b830bac | 756 | static int snd_uart16550_free(struct snd_uart16550 *uart) |
1da177e4 LT |
757 | { |
758 | if (uart->irq >= 0) | |
0b830bac | 759 | free_irq(uart->irq, uart); |
b1d5776d | 760 | release_and_free_resource(uart->res_base); |
1da177e4 LT |
761 | kfree(uart); |
762 | return 0; | |
763 | }; | |
764 | ||
4a4d2cfd | 765 | static int snd_uart16550_dev_free(struct snd_device *device) |
1da177e4 | 766 | { |
0b830bac | 767 | struct snd_uart16550 *uart = device->device_data; |
1da177e4 LT |
768 | return snd_uart16550_free(uart); |
769 | } | |
770 | ||
fbbb01a1 BP |
771 | static int snd_uart16550_create(struct snd_card *card, |
772 | unsigned long iobase, | |
773 | int irq, | |
774 | unsigned int speed, | |
775 | unsigned int base, | |
776 | int adaptor, | |
777 | int droponfull, | |
778 | struct snd_uart16550 **ruart) | |
1da177e4 | 779 | { |
4a4d2cfd | 780 | static struct snd_device_ops ops = { |
1da177e4 LT |
781 | .dev_free = snd_uart16550_dev_free, |
782 | }; | |
0b830bac | 783 | struct snd_uart16550 *uart; |
1da177e4 LT |
784 | int err; |
785 | ||
786 | ||
561b220a | 787 | if ((uart = kzalloc(sizeof(*uart), GFP_KERNEL)) == NULL) |
1da177e4 LT |
788 | return -ENOMEM; |
789 | uart->adaptor = adaptor; | |
790 | uart->card = card; | |
791 | spin_lock_init(&uart->open_lock); | |
792 | uart->irq = -1; | |
793 | uart->base = iobase; | |
794 | uart->drop_on_full = droponfull; | |
795 | ||
796 | if ((err = snd_uart16550_detect(uart)) <= 0) { | |
797 | printk(KERN_ERR "no UART detected at 0x%lx\n", iobase); | |
202728d7 | 798 | snd_uart16550_free(uart); |
68b8bc05 | 799 | return -ENODEV; |
1da177e4 LT |
800 | } |
801 | ||
802 | if (irq >= 0 && irq != SNDRV_AUTO_IRQ) { | |
803 | if (request_irq(irq, snd_uart16550_interrupt, | |
88e24c3a | 804 | 0, "Serial MIDI", uart)) { |
45203832 TI |
805 | snd_printk(KERN_WARNING |
806 | "irq %d busy. Using Polling.\n", irq); | |
1da177e4 LT |
807 | } else { |
808 | uart->irq = irq; | |
809 | } | |
810 | } | |
811 | uart->divisor = base / speed; | |
812 | uart->speed = base / (unsigned int)uart->divisor; | |
813 | uart->speed_base = base; | |
814 | uart->prev_out = -1; | |
815 | uart->prev_in = 0; | |
816 | uart->rstatus = 0; | |
817 | memset(uart->prev_status, 0x80, sizeof(unsigned char) * SNDRV_SERIAL_MAX_OUTS); | |
bc47ba90 | 818 | timer_setup(&uart->buffer_timer, snd_uart16550_buffer_timer, 0); |
1da177e4 LT |
819 | uart->timer_running = 0; |
820 | ||
821 | /* Register device */ | |
822 | if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, uart, &ops)) < 0) { | |
823 | snd_uart16550_free(uart); | |
824 | return err; | |
825 | } | |
826 | ||
827 | switch (uart->adaptor) { | |
828 | case SNDRV_SERIAL_MS124W_SA: | |
829 | case SNDRV_SERIAL_MS124W_MB: | |
830 | /* MS-124W can draw power from RTS and DTR if they | |
831 | are in opposite states. */ | |
832 | outb(UART_MCR_RTS | (0&UART_MCR_DTR), uart->base + UART_MCR); | |
833 | break; | |
834 | case SNDRV_SERIAL_MS124T: | |
835 | /* MS-124T can draw power from RTS and/or DTR (preferably | |
836 | both) if they are asserted. */ | |
837 | outb(UART_MCR_RTS | UART_MCR_DTR, uart->base + UART_MCR); | |
838 | break; | |
839 | default: | |
840 | break; | |
841 | } | |
842 | ||
843 | if (ruart) | |
844 | *ruart = uart; | |
845 | ||
846 | return 0; | |
847 | } | |
848 | ||
fbbb01a1 | 849 | static void snd_uart16550_substreams(struct snd_rawmidi_str *stream) |
1da177e4 | 850 | { |
0b830bac | 851 | struct snd_rawmidi_substream *substream; |
1da177e4 | 852 | |
0b830bac | 853 | list_for_each_entry(substream, &stream->substreams, list) { |
1da177e4 LT |
854 | sprintf(substream->name, "Serial MIDI %d", substream->number + 1); |
855 | } | |
856 | } | |
857 | ||
fbbb01a1 BP |
858 | static int snd_uart16550_rmidi(struct snd_uart16550 *uart, int device, |
859 | int outs, int ins, | |
860 | struct snd_rawmidi **rmidi) | |
1da177e4 | 861 | { |
4a4d2cfd | 862 | struct snd_rawmidi *rrawmidi; |
1da177e4 LT |
863 | int err; |
864 | ||
0b830bac TI |
865 | err = snd_rawmidi_new(uart->card, "UART Serial MIDI", device, |
866 | outs, ins, &rrawmidi); | |
867 | if (err < 0) | |
1da177e4 | 868 | return err; |
0b830bac TI |
869 | snd_rawmidi_set_ops(rrawmidi, SNDRV_RAWMIDI_STREAM_INPUT, |
870 | &snd_uart16550_input); | |
871 | snd_rawmidi_set_ops(rrawmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, | |
872 | &snd_uart16550_output); | |
1da177e4 LT |
873 | strcpy(rrawmidi->name, "Serial MIDI"); |
874 | snd_uart16550_substreams(&rrawmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]); | |
875 | snd_uart16550_substreams(&rrawmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]); | |
876 | rrawmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT | | |
877 | SNDRV_RAWMIDI_INFO_INPUT | | |
878 | SNDRV_RAWMIDI_INFO_DUPLEX; | |
879 | rrawmidi->private_data = uart; | |
880 | if (rmidi) | |
881 | *rmidi = rrawmidi; | |
882 | return 0; | |
883 | } | |
884 | ||
fbbb01a1 | 885 | static int snd_serial_probe(struct platform_device *devptr) |
1da177e4 | 886 | { |
4a4d2cfd | 887 | struct snd_card *card; |
0b830bac | 888 | struct snd_uart16550 *uart; |
1da177e4 | 889 | int err; |
9caf6b59 | 890 | int dev = devptr->id; |
1da177e4 LT |
891 | |
892 | switch (adaptor[dev]) { | |
893 | case SNDRV_SERIAL_SOUNDCANVAS: | |
894 | ins[dev] = 1; | |
895 | break; | |
896 | case SNDRV_SERIAL_MS124T: | |
897 | case SNDRV_SERIAL_MS124W_SA: | |
898 | outs[dev] = 1; | |
899 | ins[dev] = 1; | |
900 | break; | |
901 | case SNDRV_SERIAL_MS124W_MB: | |
902 | outs[dev] = 16; | |
903 | ins[dev] = 1; | |
904 | break; | |
905 | case SNDRV_SERIAL_GENERIC: | |
906 | break; | |
907 | default: | |
45203832 TI |
908 | snd_printk(KERN_ERR |
909 | "Adaptor type is out of range 0-%d (%d)\n", | |
1da177e4 LT |
910 | SNDRV_SERIAL_MAX_ADAPTOR, adaptor[dev]); |
911 | return -ENODEV; | |
912 | } | |
913 | ||
914 | if (outs[dev] < 1 || outs[dev] > SNDRV_SERIAL_MAX_OUTS) { | |
45203832 TI |
915 | snd_printk(KERN_ERR |
916 | "Count of outputs is out of range 1-%d (%d)\n", | |
1da177e4 LT |
917 | SNDRV_SERIAL_MAX_OUTS, outs[dev]); |
918 | return -ENODEV; | |
919 | } | |
920 | ||
921 | if (ins[dev] < 1 || ins[dev] > SNDRV_SERIAL_MAX_INS) { | |
45203832 TI |
922 | snd_printk(KERN_ERR |
923 | "Count of inputs is out of range 1-%d (%d)\n", | |
1da177e4 LT |
924 | SNDRV_SERIAL_MAX_INS, ins[dev]); |
925 | return -ENODEV; | |
926 | } | |
927 | ||
5872f3f6 TI |
928 | err = snd_card_new(&devptr->dev, index[dev], id[dev], THIS_MODULE, |
929 | 0, &card); | |
bd7dd77c TI |
930 | if (err < 0) |
931 | return err; | |
1da177e4 LT |
932 | |
933 | strcpy(card->driver, "Serial"); | |
934 | strcpy(card->shortname, "Serial MIDI (UART16550A)"); | |
935 | ||
936 | if ((err = snd_uart16550_create(card, | |
937 | port[dev], | |
938 | irq[dev], | |
939 | speed[dev], | |
940 | base[dev], | |
941 | adaptor[dev], | |
942 | droponfull[dev], | |
16dab54b TI |
943 | &uart)) < 0) |
944 | goto _err; | |
1da177e4 | 945 | |
0b830bac TI |
946 | err = snd_uart16550_rmidi(uart, 0, outs[dev], ins[dev], &uart->rmidi); |
947 | if (err < 0) | |
16dab54b | 948 | goto _err; |
1da177e4 | 949 | |
bd0185ce | 950 | sprintf(card->longname, "%s [%s] at %#lx, irq %d", |
1da177e4 | 951 | card->shortname, |
1da177e4 | 952 | adaptor_names[uart->adaptor], |
bd0185ce CL |
953 | uart->base, |
954 | uart->irq); | |
1da177e4 | 955 | |
16dab54b TI |
956 | if ((err = snd_card_register(card)) < 0) |
957 | goto _err; | |
958 | ||
9caf6b59 | 959 | platform_set_drvdata(devptr, card); |
1da177e4 | 960 | return 0; |
16dab54b TI |
961 | |
962 | _err: | |
963 | snd_card_free(card); | |
964 | return err; | |
1da177e4 LT |
965 | } |
966 | ||
fbbb01a1 | 967 | static int snd_serial_remove(struct platform_device *devptr) |
9caf6b59 TI |
968 | { |
969 | snd_card_free(platform_get_drvdata(devptr)); | |
9caf6b59 TI |
970 | return 0; |
971 | } | |
972 | ||
973 | #define SND_SERIAL_DRIVER "snd_serial_u16550" | |
974 | ||
975 | static struct platform_driver snd_serial_driver = { | |
976 | .probe = snd_serial_probe, | |
fbbb01a1 | 977 | .remove = snd_serial_remove, |
9caf6b59 | 978 | .driver = { |
8bf01d8a | 979 | .name = SND_SERIAL_DRIVER, |
9caf6b59 TI |
980 | }, |
981 | }; | |
982 | ||
bdec0c72 | 983 | static void snd_serial_unregister_all(void) |
f7a9275d CL |
984 | { |
985 | int i; | |
986 | ||
987 | for (i = 0; i < ARRAY_SIZE(devices); ++i) | |
988 | platform_device_unregister(devices[i]); | |
989 | platform_driver_unregister(&snd_serial_driver); | |
990 | } | |
991 | ||
1da177e4 LT |
992 | static int __init alsa_card_serial_init(void) |
993 | { | |
9caf6b59 | 994 | int i, cards, err; |
1da177e4 | 995 | |
9caf6b59 TI |
996 | if ((err = platform_driver_register(&snd_serial_driver)) < 0) |
997 | return err; | |
1da177e4 | 998 | |
9caf6b59 | 999 | cards = 0; |
8278ca8f | 1000 | for (i = 0; i < SNDRV_CARDS; i++) { |
9caf6b59 | 1001 | struct platform_device *device; |
8278ca8f TI |
1002 | if (! enable[i]) |
1003 | continue; | |
9caf6b59 TI |
1004 | device = platform_device_register_simple(SND_SERIAL_DRIVER, |
1005 | i, NULL, 0); | |
a182ee98 RH |
1006 | if (IS_ERR(device)) |
1007 | continue; | |
7152447d RH |
1008 | if (!platform_get_drvdata(device)) { |
1009 | platform_device_unregister(device); | |
1010 | continue; | |
1011 | } | |
f7a9275d | 1012 | devices[i] = device; |
9caf6b59 TI |
1013 | cards++; |
1014 | } | |
1015 | if (! cards) { | |
1da177e4 LT |
1016 | #ifdef MODULE |
1017 | printk(KERN_ERR "serial midi soundcard not found or device busy\n"); | |
1018 | #endif | |
a182ee98 RH |
1019 | snd_serial_unregister_all(); |
1020 | return -ENODEV; | |
1da177e4 LT |
1021 | } |
1022 | return 0; | |
1023 | } | |
1024 | ||
1025 | static void __exit alsa_card_serial_exit(void) | |
1026 | { | |
f7a9275d | 1027 | snd_serial_unregister_all(); |
1da177e4 LT |
1028 | } |
1029 | ||
1030 | module_init(alsa_card_serial_init) | |
1031 | module_exit(alsa_card_serial_exit) |