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Commit 0b830bac authored by Takashi Iwai's avatar Takashi Iwai Committed by Jaroslav Kysela
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[ALSA] Clean up serial-u16500.c 



Remove uesless typedefs and clean up the code a bit to follow
the standard coding style.

Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
Signed-off-by: default avatarJaroslav Kysela <perex@suse.cz>
parent 5b78efd2

sound/drivers/serial-u16550.c

+123 −98
Original line number Diff line number Diff line
@@ -117,13 +117,13 @@ MODULE_PARM_DESC(adaptor, "Type of adaptor."); 
#define SERIAL_MODE_INPUT_TRIGGERED	(1 << 2)

#define SERIAL_MODE_OUTPUT_TRIGGERED	(1 << 3)



typedef struct _snd_uart16550 {

struct snd_uart16550 {

	struct snd_card *card;

	struct snd_rawmidi *rmidi;

	struct snd_rawmidi_substream *midi_output[SNDRV_SERIAL_MAX_OUTS];

	struct snd_rawmidi_substream *midi_input[SNDRV_SERIAL_MAX_INS];



	int filemode;		//open status of file

	int filemode;		/* open status of file */



	spinlock_t open_lock;
@@ -140,37 +140,37 @@ typedef struct _snd_uart16550 { 
	unsigned char old_divisor_msb;

	unsigned char old_line_ctrl_reg;



	// parameter for using of write loop

	short int fifo_limit;	//used in uart16550

        short int fifo_count;	//used in uart16550

	/* parameter for using of write loop */

	short int fifo_limit;	/* used in uart16550 */

        short int fifo_count;	/* used in uart16550 */



	// type of adaptor

	/* type of adaptor */

	int adaptor;



	// inputs

	/* inputs */

	int prev_in;

	unsigned char rstatus;



	// outputs

	/* outputs */

	int prev_out;

	unsigned char prev_status[SNDRV_SERIAL_MAX_OUTS];



	// write buffer and its writing/reading position

	/* write buffer and its writing/reading position */

	unsigned char tx_buff[TX_BUFF_SIZE];

	int buff_in_count;

        int buff_in;

        int buff_out;

        int drop_on_full;



	// wait timer

	/* wait timer */

	unsigned int timer_running:1;

	struct timer_list buffer_timer;



} snd_uart16550_t;

};



static struct platform_device *devices[SNDRV_CARDS];



static inline void snd_uart16550_add_timer(snd_uart16550_t *uart)

static inline void snd_uart16550_add_timer(struct snd_uart16550 *uart)

{

	if (!uart->timer_running) {

		/* timer 38600bps * 10bit * 16byte */
@@ -180,7 +180,7 @@ static inline void snd_uart16550_add_timer(snd_uart16550_t *uart) 
	}

}



static inline void snd_uart16550_del_timer(snd_uart16550_t *uart)

static inline void snd_uart16550_del_timer(struct snd_uart16550 *uart)

{

	if (uart->timer_running) {

		del_timer(&uart->buffer_timer);
@@ -189,7 +189,7 @@ static inline void snd_uart16550_del_timer(snd_uart16550_t *uart) 
}



/* This macro is only used in snd_uart16550_io_loop */

static inline void snd_uart16550_buffer_output(snd_uart16550_t *uart)

static inline void snd_uart16550_buffer_output(struct snd_uart16550 *uart)

{

	unsigned short buff_out = uart->buff_out;

	if (uart->buff_in_count > 0) {
@@ -206,7 +206,7 @@ static inline void snd_uart16550_buffer_output(snd_uart16550_t *uart) 
 * We don't want to interrupt this, 

 * as we're already handling an interrupt 

 */

static void snd_uart16550_io_loop(snd_uart16550_t * uart)

static void snd_uart16550_io_loop(struct snd_uart16550 * uart)

{

	unsigned char c, status;

	int substream;
@@ -220,9 +220,8 @@ static void snd_uart16550_io_loop(snd_uart16550_t * uart) 
		c = inb(uart->base + UART_RX);



		/* keep track of last status byte */

		if (c & 0x80) {

		if (c & 0x80)

			uart->rstatus = c;

		}



		/* handle stream switch */

		if (uart->adaptor == SNDRV_SERIAL_GENERIC) {
@@ -230,14 +229,16 @@ static void snd_uart16550_io_loop(snd_uart16550_t * uart) 
				if (c <= SNDRV_SERIAL_MAX_INS && c > 0)

					substream = c - 1;

				if (c != 0xf5)

					uart->rstatus = 0; /* prevent future bytes from being interpreted as streams */

			}

			else if ((uart->filemode & SERIAL_MODE_INPUT_OPEN) && (uart->midi_input[substream] != NULL)) {

				snd_rawmidi_receive(uart->midi_input[substream], &c, 1);

			}

		} else if ((uart->filemode & SERIAL_MODE_INPUT_OPEN) && (uart->midi_input[substream] != NULL)) {

					/* prevent future bytes from being

					   interpreted as streams */

					uart->rstatus = 0;

			} else if ((uart->filemode & SERIAL_MODE_INPUT_OPEN)

				   && uart->midi_input[substream])

				snd_rawmidi_receive(uart->midi_input[substream],

						    &c, 1);

		} else if ((uart->filemode & SERIAL_MODE_INPUT_OPEN) &&

			   uart->midi_input[substream])

			snd_rawmidi_receive(uart->midi_input[substream], &c, 1);

		}



		if (status & UART_LSR_OE)

			snd_printk("%s: Overrun on device at 0x%lx\n",
@@ -250,15 +251,14 @@ static void snd_uart16550_io_loop(snd_uart16550_t * uart) 
	/* no need of check SERIAL_MODE_OUTPUT_OPEN because if not,

	   buffer is never filled. */

	/* Check write status */

	if (status & UART_LSR_THRE) {

	if (status & UART_LSR_THRE)

		uart->fifo_count = 0;

	}

	if (uart->adaptor == SNDRV_SERIAL_MS124W_SA

	   || uart->adaptor == SNDRV_SERIAL_GENERIC) {

		/* Can't use FIFO, must send only when CTS is true */

		status = inb(uart->base + UART_MSR);

		while( (uart->fifo_count == 0) && (status & UART_MSR_CTS) &&

		      (uart->buff_in_count > 0) ) {

		while (uart->fifo_count == 0 && (status & UART_MSR_CTS) &&

		       uart->buff_in_count > 0) {

		       snd_uart16550_buffer_output(uart);

		       status = inb(uart->base + UART_MSR);

		}
@@ -294,15 +294,16 @@ static void snd_uart16550_io_loop(snd_uart16550_t * uart) 
 */

static irqreturn_t snd_uart16550_interrupt(int irq, void *dev_id)

{

	snd_uart16550_t *uart;

	struct snd_uart16550 *uart;



	uart = (snd_uart16550_t *) dev_id;

	uart = dev_id;

	spin_lock(&uart->open_lock);

	if (uart->filemode == SERIAL_MODE_NOT_OPENED) {

		spin_unlock(&uart->open_lock);

		return IRQ_NONE;

	}

	inb(uart->base + UART_IIR);		/* indicate to the UART that the interrupt has been serviced */

	/* indicate to the UART that the interrupt has been serviced */

	inb(uart->base + UART_IIR);

	snd_uart16550_io_loop(uart);

	spin_unlock(&uart->open_lock);

	return IRQ_HANDLED;
@@ -312,9 +313,9 @@ static irqreturn_t snd_uart16550_interrupt(int irq, void *dev_id) 
static void snd_uart16550_buffer_timer(unsigned long data)

{

	unsigned long flags;

	snd_uart16550_t *uart;

	struct snd_uart16550 *uart;



	uart = (snd_uart16550_t *)data;

	uart = (struct snd_uart16550 *)data;

	spin_lock_irqsave(&uart->open_lock, flags);

	snd_uart16550_del_timer(uart);

	snd_uart16550_io_loop(uart);
@@ -326,7 +327,7 @@ static void snd_uart16550_buffer_timer(unsigned long data) 
 *  return 0 if found

 *  return negative error if not found

 */

static int __init snd_uart16550_detect(snd_uart16550_t *uart)

static int __init snd_uart16550_detect(struct snd_uart16550 *uart)

{

	unsigned long io_base = uart->base;

	int ok;
@@ -343,7 +344,8 @@ static int __init snd_uart16550_detect(snd_uart16550_t *uart) 
		return -EBUSY;

	}



	ok = 1;			/* uart detected unless one of the following tests should fail */

	/* uart detected unless one of the following tests should fail */

	ok = 1;

	/* 8 data-bits, 1 stop-bit, parity off, DLAB = 0 */

	outb(UART_LCR_WLEN8, io_base + UART_LCR); /* Line Control Register */

	c = inb(io_base + UART_IER);
@@ -368,7 +370,7 @@ static int __init snd_uart16550_detect(snd_uart16550_t *uart) 
	return ok;

}



static void snd_uart16550_do_open(snd_uart16550_t * uart)

static void snd_uart16550_do_open(struct snd_uart16550 * uart)

{

	char byte;
@@ -460,7 +462,7 @@ static void snd_uart16550_do_open(snd_uart16550_t * uart) 
	inb(uart->base + UART_RX);	/* Clear any pre-existing receive interrupt */

}



static void snd_uart16550_do_close(snd_uart16550_t * uart)

static void snd_uart16550_do_close(struct snd_uart16550 * uart)

{

	if (uart->irq < 0)

		snd_uart16550_del_timer(uart);
@@ -514,7 +516,7 @@ static void snd_uart16550_do_close(snd_uart16550_t * uart) 
static int snd_uart16550_input_open(struct snd_rawmidi_substream *substream)

{

	unsigned long flags;

	snd_uart16550_t *uart = substream->rmidi->private_data;

	struct snd_uart16550 *uart = substream->rmidi->private_data;



	spin_lock_irqsave(&uart->open_lock, flags);

	if (uart->filemode == SERIAL_MODE_NOT_OPENED)
@@ -528,7 +530,7 @@ static int snd_uart16550_input_open(struct snd_rawmidi_substream *substream) 
static int snd_uart16550_input_close(struct snd_rawmidi_substream *substream)

{

	unsigned long flags;

	snd_uart16550_t *uart = substream->rmidi->private_data;

	struct snd_uart16550 *uart = substream->rmidi->private_data;



	spin_lock_irqsave(&uart->open_lock, flags);

	uart->filemode &= ~SERIAL_MODE_INPUT_OPEN;
@@ -539,24 +541,24 @@ static int snd_uart16550_input_close(struct snd_rawmidi_substream *substream) 
	return 0;

}



static void snd_uart16550_input_trigger(struct snd_rawmidi_substream *substream, int up)

static void snd_uart16550_input_trigger(struct snd_rawmidi_substream *substream,

					int up)

{

	unsigned long flags;

	snd_uart16550_t *uart = substream->rmidi->private_data;

	struct snd_uart16550 *uart = substream->rmidi->private_data;



	spin_lock_irqsave(&uart->open_lock, flags);

	if (up) {

	if (up)

		uart->filemode |= SERIAL_MODE_INPUT_TRIGGERED;

	} else {

	else

		uart->filemode &= ~SERIAL_MODE_INPUT_TRIGGERED;

	}

	spin_unlock_irqrestore(&uart->open_lock, flags);

}



static int snd_uart16550_output_open(struct snd_rawmidi_substream *substream)

{

	unsigned long flags;

	snd_uart16550_t *uart = substream->rmidi->private_data;

	struct snd_uart16550 *uart = substream->rmidi->private_data;



	spin_lock_irqsave(&uart->open_lock, flags);

	if (uart->filemode == SERIAL_MODE_NOT_OPENED)
@@ -570,7 +572,7 @@ static int snd_uart16550_output_open(struct snd_rawmidi_substream *substream) 
static int snd_uart16550_output_close(struct snd_rawmidi_substream *substream)

{

	unsigned long flags;

	snd_uart16550_t *uart = substream->rmidi->private_data;

	struct snd_uart16550 *uart = substream->rmidi->private_data;



	spin_lock_irqsave(&uart->open_lock, flags);

	uart->filemode &= ~SERIAL_MODE_OUTPUT_OPEN;
@@ -581,7 +583,8 @@ static int snd_uart16550_output_close(struct snd_rawmidi_substream *substream) 
	return 0;

};



static inline int snd_uart16550_buffer_can_write( snd_uart16550_t *uart, int Num )

static inline int snd_uart16550_buffer_can_write(struct snd_uart16550 *uart,

						 int Num)

{

	if (uart->buff_in_count + Num < TX_BUFF_SIZE)

		return 1;
@@ -589,7 +592,8 @@ static inline int snd_uart16550_buffer_can_write( snd_uart16550_t *uart, int Num 
		return 0;

}



static inline int snd_uart16550_write_buffer(snd_uart16550_t *uart, unsigned char byte)

static inline int snd_uart16550_write_buffer(struct snd_uart16550 *uart,

					     unsigned char byte)

{

	unsigned short buff_in = uart->buff_in;

	if (uart->buff_in_count < TX_BUFF_SIZE) {
@@ -605,7 +609,9 @@ static inline int snd_uart16550_write_buffer(snd_uart16550_t *uart, unsigned cha 
		return 0;

}



static int snd_uart16550_output_byte(snd_uart16550_t *uart, struct snd_rawmidi_substream *substream, unsigned char midi_byte)

static int snd_uart16550_output_byte(struct snd_uart16550 *uart,

				     struct snd_rawmidi_substream *substream,

				     unsigned char midi_byte)

{

	if (uart->buff_in_count == 0                    /* Buffer empty? */

	    && ((uart->adaptor != SNDRV_SERIAL_MS124W_SA &&
@@ -623,7 +629,8 @@ static int snd_uart16550_output_byte(snd_uart16550_t *uart, struct snd_rawmidi_s 
			        uart->fifo_count++;

				outb(midi_byte, uart->base + UART_TX);

			} else {

			        /* Cannot write (buffer empty) - put char in buffer */

			        /* Cannot write (buffer empty) -

				 * put char in buffer */

				snd_uart16550_write_buffer(uart, midi_byte);

			}

		}
@@ -642,7 +649,7 @@ static void snd_uart16550_output_write(struct snd_rawmidi_substream *substream) 
{

	unsigned long flags;

	unsigned char midi_byte, addr_byte;

	snd_uart16550_t *uart = substream->rmidi->private_data;

	struct snd_uart16550 *uart = substream->rmidi->private_data;

	char first;

	static unsigned long lasttime = 0;
@@ -653,7 +660,7 @@ static void snd_uart16550_output_write(struct snd_rawmidi_substream *substream) 


	spin_lock_irqsave(&uart->open_lock, flags);



	if (uart->irq < 0)	//polling

	if (uart->irq < 0)	/* polling */

		snd_uart16550_io_loop(uart);



	if (uart->adaptor == SNDRV_SERIAL_MS124W_MB) {
@@ -671,7 +678,8 @@ static void snd_uart16550_output_write(struct snd_rawmidi_substream *substream) 
			/* select any combination of the four ports */

			addr_byte = (substream->number << 4) | 0x08;

			/* ...except none */

			if (addr_byte == 0x08) addr_byte = 0xf8;

			if (addr_byte == 0x08)

				addr_byte = 0xf8;

#endif

			snd_uart16550_output_byte(uart, substream, addr_byte);

			/* send midi byte */
@@ -679,23 +687,33 @@ static void snd_uart16550_output_write(struct snd_rawmidi_substream *substream) 
		}

	} else {

		first = 0;

		while( 1 == snd_rawmidi_transmit_peek(substream, &midi_byte, 1) ) {

			/* Also send F5 after 3 seconds with no data to handle device disconnect */

			if (first == 0 && (uart->adaptor == SNDRV_SERIAL_SOUNDCANVAS ||

		while (snd_rawmidi_transmit_peek(substream, &midi_byte, 1) == 1) {

			/* Also send F5 after 3 seconds with no data

			 * to handle device disconnect */

			if (first == 0 &&

			    (uart->adaptor == SNDRV_SERIAL_SOUNDCANVAS ||

			     uart->adaptor == SNDRV_SERIAL_GENERIC) &&

			   (uart->prev_out != substream->number || jiffies-lasttime > 3*HZ)) {

			    (uart->prev_out != substream->number ||

			     jiffies-lasttime > 3*HZ)) {



				if (snd_uart16550_buffer_can_write(uart, 3)) {

					/* Roland Soundcanvas part selection */

					/* If this substream of the data is different previous

					   substream in this uart, send the change part event */

					/* If this substream of the data is

					 * different previous substream

					 * in this uart, send the change part

					 * event

					 */

					uart->prev_out = substream->number;

					/* change part */

					snd_uart16550_output_byte(uart, substream, 0xf5);

					snd_uart16550_output_byte(uart, substream,

								  0xf5);

					/* data */

					snd_uart16550_output_byte(uart, substream, uart->prev_out + 1);

					/* If midi_byte is a data byte, send the previous status byte */

					if ((midi_byte < 0x80) && (uart->adaptor == SNDRV_SERIAL_SOUNDCANVAS))

					snd_uart16550_output_byte(uart, substream,

								  uart->prev_out + 1);

					/* If midi_byte is a data byte,

					 * send the previous status byte */

					if (midi_byte < 0x80 &&

					    uart->adaptor == SNDRV_SERIAL_SOUNDCANVAS)

						snd_uart16550_output_byte(uart, substream, uart->prev_status[uart->prev_out]);

				} else if (!uart->drop_on_full)

					break;
@@ -703,7 +721,8 @@ static void snd_uart16550_output_write(struct snd_rawmidi_substream *substream) 
			}



			/* send midi byte */

			if( !snd_uart16550_output_byte(uart, substream, midi_byte) && !uart->drop_on_full )

			if (!snd_uart16550_output_byte(uart, substream, midi_byte) &&

			    !uart->drop_on_full )

				break;



			if (midi_byte >= 0x80 && midi_byte < 0xf0)
@@ -717,17 +736,17 @@ static void snd_uart16550_output_write(struct snd_rawmidi_substream *substream) 
	spin_unlock_irqrestore(&uart->open_lock, flags);

}



static void snd_uart16550_output_trigger(struct snd_rawmidi_substream *substream, int up)

static void snd_uart16550_output_trigger(struct snd_rawmidi_substream *substream,

					 int up)

{

	unsigned long flags;

	snd_uart16550_t *uart = substream->rmidi->private_data;

	struct snd_uart16550 *uart = substream->rmidi->private_data;



	spin_lock_irqsave(&uart->open_lock, flags);

	if (up) {

	if (up)

		uart->filemode |= SERIAL_MODE_OUTPUT_TRIGGERED;

	} else {

	else

		uart->filemode &= ~SERIAL_MODE_OUTPUT_TRIGGERED;

	}

	spin_unlock_irqrestore(&uart->open_lock, flags);

	if (up)

		snd_uart16550_output_write(substream);
@@ -747,10 +766,10 @@ static struct snd_rawmidi_ops snd_uart16550_input = 
	.trigger =	snd_uart16550_input_trigger,

};



static int snd_uart16550_free(snd_uart16550_t *uart)

static int snd_uart16550_free(struct snd_uart16550 *uart)

{

	if (uart->irq >= 0)

		free_irq(uart->irq, (void *)uart);

		free_irq(uart->irq, uart);

	release_and_free_resource(uart->res_base);

	kfree(uart);

	return 0;
@@ -758,7 +777,7 @@ static int snd_uart16550_free(snd_uart16550_t *uart) 


static int snd_uart16550_dev_free(struct snd_device *device)

{

	snd_uart16550_t *uart = device->device_data;

	struct snd_uart16550 *uart = device->device_data;

	return snd_uart16550_free(uart);

}
@@ -769,12 +788,12 @@ static int __init snd_uart16550_create(struct snd_card *card, 
				       unsigned int base,

				       int adaptor,

				       int droponfull,

				       snd_uart16550_t **ruart)

				       struct snd_uart16550 **ruart)

{

	static struct snd_device_ops ops = {

		.dev_free =	snd_uart16550_dev_free,

	};

	snd_uart16550_t *uart;

	struct snd_uart16550 *uart;

	int err;
@@ -795,7 +814,7 @@ static int __init snd_uart16550_create(struct snd_card *card, 


	if (irq >= 0 && irq != SNDRV_AUTO_IRQ) {

		if (request_irq(irq, snd_uart16550_interrupt,

				IRQF_DISABLED, "Serial MIDI", (void *) uart)) {

				IRQF_DISABLED, "Serial MIDI", uart)) {

			snd_printk("irq %d busy. Using Polling.\n", irq);

		} else {

			uart->irq = irq;
@@ -843,23 +862,28 @@ static int __init snd_uart16550_create(struct snd_card *card, 


static void __init snd_uart16550_substreams(struct snd_rawmidi_str *stream)

{

	struct list_head *list;

	struct snd_rawmidi_substream *substream;



	list_for_each(list, &stream->substreams) {

		struct snd_rawmidi_substream *substream = list_entry(list, struct snd_rawmidi_substream, list);

	list_for_each_entry(substream, &stream->substreams, list) {

		sprintf(substream->name, "Serial MIDI %d", substream->number + 1);

	}

}



static int __init snd_uart16550_rmidi(snd_uart16550_t *uart, int device, int outs, int ins, struct snd_rawmidi **rmidi)

static int __init snd_uart16550_rmidi(struct snd_uart16550 *uart, int device,

				      int outs, int ins,

				      struct snd_rawmidi **rmidi)

{

	struct snd_rawmidi *rrawmidi;

	int err;



	if ((err = snd_rawmidi_new(uart->card, "UART Serial MIDI", device, outs, ins, &rrawmidi)) < 0)

	err = snd_rawmidi_new(uart->card, "UART Serial MIDI", device,

			      outs, ins, &rrawmidi);

	if (err < 0)

		return err;

	snd_rawmidi_set_ops(rrawmidi, SNDRV_RAWMIDI_STREAM_INPUT, &snd_uart16550_input);

	snd_rawmidi_set_ops(rrawmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &snd_uart16550_output);

	snd_rawmidi_set_ops(rrawmidi, SNDRV_RAWMIDI_STREAM_INPUT,

			    &snd_uart16550_input);

	snd_rawmidi_set_ops(rrawmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,

			    &snd_uart16550_output);

	strcpy(rrawmidi->name, "Serial MIDI");

	snd_uart16550_substreams(&rrawmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]);

	snd_uart16550_substreams(&rrawmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]);
@@ -875,7 +899,7 @@ static int __init snd_uart16550_rmidi(snd_uart16550_t *uart, int device, int out 
static int __init snd_serial_probe(struct platform_device *devptr)

{

	struct snd_card *card;

	snd_uart16550_t *uart;

	struct snd_uart16550 *uart;

	int err;

	int dev = devptr->id;
@@ -929,7 +953,8 @@ static int __init snd_serial_probe(struct platform_device *devptr) 
					&uart)) < 0)

		goto _err;



	if ((err = snd_uart16550_rmidi(uart, 0, outs[dev], ins[dev], &uart->rmidi)) < 0)

	err = snd_uart16550_rmidi(uart, 0, outs[dev], ins[dev], &uart->rmidi);

	if (err < 0)

		goto _err;



	sprintf(card->longname, "%s at 0x%lx, irq %d speed %d div %d outs %d ins %d adaptor %s droponfull %d",