[linux-2.6-block.git] / sound / pci / mixart / mixart_core.c

/*
 * Driver for Digigram miXart soundcards
 *
 * low level interface with interrupt handling and mail box implementation
 *
 * Copyright (c) 2003 by Digigram <alsa@digigram.com>
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 */

#include <linux/interrupt.h>
#include <linux/mutex.h>
#include <linux/pci.h>
#include <linux/io.h>

#include <sound/core.h>
#include "mixart.h"
#include "mixart_hwdep.h"
#include "mixart_core.h"


#define MSG_TIMEOUT_JIFFIES         (400 * HZ) / 1000 /* 400 ms */

#define MSG_DESCRIPTOR_SIZE         0x24
#define MSG_HEADER_SIZE             (MSG_DESCRIPTOR_SIZE + 4)

#define MSG_DEFAULT_SIZE            512

#define MSG_TYPE_MASK               0x00000003    /* mask for following types */
#define MSG_TYPE_NOTIFY             0             /* embedded -> driver (only notification, do not get_msg() !) */
#define MSG_TYPE_COMMAND            1             /* driver <-> embedded (a command has no answer) */
#define MSG_TYPE_REQUEST            2             /* driver -> embedded (request will get an answer back) */
#define MSG_TYPE_ANSWER             3             /* embedded -> driver */
#define MSG_CANCEL_NOTIFY_MASK      0x80000000    /* this bit is set for a notification that has been canceled */


static int retrieve_msg_frame(struct mixart_mgr *mgr, u32 *msg_frame)
{
	/* read the message frame fifo */
	u32 headptr, tailptr;

	tailptr = readl_be(MIXART_MEM(mgr, MSG_OUTBOUND_POST_TAIL));
	headptr = readl_be(MIXART_MEM(mgr, MSG_OUTBOUND_POST_HEAD));

	if (tailptr == headptr)
		return 0; /* no message posted */

	if (tailptr < MSG_OUTBOUND_POST_STACK)
		return 0; /* error */
	if (tailptr >= MSG_OUTBOUND_POST_STACK + MSG_BOUND_STACK_SIZE)
		return 0; /* error */

	*msg_frame = readl_be(MIXART_MEM(mgr, tailptr));

	/* increment the tail index */
	tailptr += 4;
	if( tailptr >= (MSG_OUTBOUND_POST_STACK+MSG_BOUND_STACK_SIZE) )
		tailptr = MSG_OUTBOUND_POST_STACK;
	writel_be(tailptr, MIXART_MEM(mgr, MSG_OUTBOUND_POST_TAIL));

	return 1;
}

static int get_msg(struct mixart_mgr *mgr, struct mixart_msg *resp,
		   u32 msg_frame_address )
{
	u32  headptr;
	u32  size;
	int  err;
#ifndef __BIG_ENDIAN
	unsigned int i;
#endif

	mutex_lock(&mgr->msg_lock);
	err = 0;

	/* copy message descriptor from miXart to driver */
	size                =  readl_be(MIXART_MEM(mgr, msg_frame_address));       /* size of descriptor + response */
	resp->message_id    =  readl_be(MIXART_MEM(mgr, msg_frame_address + 4));   /* dwMessageID */
	resp->uid.object_id =  readl_be(MIXART_MEM(mgr, msg_frame_address + 8));   /* uidDest */
	resp->uid.desc      =  readl_be(MIXART_MEM(mgr, msg_frame_address + 12));  /* */

	if( (size < MSG_DESCRIPTOR_SIZE) || (resp->size < (size - MSG_DESCRIPTOR_SIZE))) {
		err = -EINVAL;
		dev_err(&mgr->pci->dev,
			"problem with response size = %d\n", size);
		goto _clean_exit;
	}
	size -= MSG_DESCRIPTOR_SIZE;

	memcpy_fromio(resp->data, MIXART_MEM(mgr, msg_frame_address + MSG_HEADER_SIZE ), size);
	resp->size = size;

	/* swap if necessary */
#ifndef __BIG_ENDIAN
	size /= 4; /* u32 size */
	for(i=0; i < size; i++) {
		((u32*)resp->data)[i] = be32_to_cpu(((u32*)resp->data)[i]);
	}
#endif

	/*
	 * free message frame address
	 */
	headptr = readl_be(MIXART_MEM(mgr, MSG_OUTBOUND_FREE_HEAD));

	if( (headptr < MSG_OUTBOUND_FREE_STACK) || ( headptr >= (MSG_OUTBOUND_FREE_STACK+MSG_BOUND_STACK_SIZE))) {
		err = -EINVAL;
		goto _clean_exit;
	}

	/* give address back to outbound fifo */
	writel_be(msg_frame_address, MIXART_MEM(mgr, headptr));

	/* increment the outbound free head */
	headptr += 4;
	if( headptr >= (MSG_OUTBOUND_FREE_STACK+MSG_BOUND_STACK_SIZE) )
		headptr = MSG_OUTBOUND_FREE_STACK;

	writel_be(headptr, MIXART_MEM(mgr, MSG_OUTBOUND_FREE_HEAD));

 _clean_exit:
	mutex_unlock(&mgr->msg_lock);

	return err;
}


/*
 * send a message to miXart. return: the msg_frame used for this message
 */
/* call with mgr->msg_lock held! */
static int send_msg( struct mixart_mgr *mgr,
		     struct mixart_msg *msg,
		     int max_answersize,
		     int mark_pending,
		     u32 *msg_event)
{
	u32 headptr, tailptr;
	u32 msg_frame_address;
	int i;

	if (snd_BUG_ON(msg->size % 4))
		return -EINVAL;

	/* get message frame address */
	tailptr = readl_be(MIXART_MEM(mgr, MSG_INBOUND_FREE_TAIL));
	headptr = readl_be(MIXART_MEM(mgr, MSG_INBOUND_FREE_HEAD));

	if (tailptr == headptr) {
		dev_err(&mgr->pci->dev, "error: no message frame available\n");
		return -EBUSY;
	}

	if( (tailptr < MSG_INBOUND_FREE_STACK) || (tailptr >= (MSG_INBOUND_FREE_STACK+MSG_BOUND_STACK_SIZE))) {
		return -EINVAL;
	}

	msg_frame_address = readl_be(MIXART_MEM(mgr, tailptr));
	writel(0, MIXART_MEM(mgr, tailptr)); /* set address to zero on this fifo position */

	/* increment the inbound free tail */
	tailptr += 4;
	if( tailptr >= (MSG_INBOUND_FREE_STACK+MSG_BOUND_STACK_SIZE) )
		tailptr = MSG_INBOUND_FREE_STACK;

	writel_be(tailptr, MIXART_MEM(mgr, MSG_INBOUND_FREE_TAIL));

	/* TODO : use memcpy_toio() with intermediate buffer to copy the message */

	/* copy message descriptor to card memory */
	writel_be( msg->size + MSG_DESCRIPTOR_SIZE,      MIXART_MEM(mgr, msg_frame_address) );      /* size of descriptor + request */
	writel_be( msg->message_id ,                     MIXART_MEM(mgr, msg_frame_address + 4) );  /* dwMessageID */
	writel_be( msg->uid.object_id,                   MIXART_MEM(mgr, msg_frame_address + 8) );  /* uidDest */
	writel_be( msg->uid.desc,                        MIXART_MEM(mgr, msg_frame_address + 12) ); /* */
	writel_be( MSG_DESCRIPTOR_SIZE,                  MIXART_MEM(mgr, msg_frame_address + 16) ); /* SizeHeader */
	writel_be( MSG_DESCRIPTOR_SIZE,                  MIXART_MEM(mgr, msg_frame_address + 20) ); /* OffsetDLL_T16 */
	writel_be( msg->size,                            MIXART_MEM(mgr, msg_frame_address + 24) ); /* SizeDLL_T16 */
	writel_be( MSG_DESCRIPTOR_SIZE,                  MIXART_MEM(mgr, msg_frame_address + 28) ); /* OffsetDLL_DRV */
	writel_be( 0,                                    MIXART_MEM(mgr, msg_frame_address + 32) ); /* SizeDLL_DRV */
	writel_be( MSG_DESCRIPTOR_SIZE + max_answersize, MIXART_MEM(mgr, msg_frame_address + 36) ); /* dwExpectedAnswerSize */

	/* copy message data to card memory */
	for( i=0; i < msg->size; i+=4 ) {
		writel_be( *(u32*)(msg->data + i), MIXART_MEM(mgr, MSG_HEADER_SIZE + msg_frame_address + i)  );
	}

	if( mark_pending ) {
		if( *msg_event ) {
			/* the pending event is the notification we wait for ! */
			mgr->pending_event = *msg_event;
		}
		else {
			/* the pending event is the answer we wait for (same address than the request)! */
			mgr->pending_event = msg_frame_address;

			/* copy address back to caller */
			*msg_event = msg_frame_address;
		}
	}

	/* mark the frame as a request (will have an answer) */
	msg_frame_address |= MSG_TYPE_REQUEST;

	/* post the frame */
	headptr = readl_be(MIXART_MEM(mgr, MSG_INBOUND_POST_HEAD));

	if( (headptr < MSG_INBOUND_POST_STACK) || (headptr >= (MSG_INBOUND_POST_STACK+MSG_BOUND_STACK_SIZE))) {
		return -EINVAL;
	}

	writel_be(msg_frame_address, MIXART_MEM(mgr, headptr));

	/* increment the inbound post head */
	headptr += 4;
	if( headptr >= (MSG_INBOUND_POST_STACK+MSG_BOUND_STACK_SIZE) )
		headptr = MSG_INBOUND_POST_STACK;

	writel_be(headptr, MIXART_MEM(mgr, MSG_INBOUND_POST_HEAD));

	return 0;
}


int snd_mixart_send_msg(struct mixart_mgr *mgr, struct mixart_msg *request, int max_resp_size, void *resp_data)
{
	struct mixart_msg resp;
	u32 msg_frame = 0; /* set to 0, so it's no notification to wait for, but the answer */
	int err;
	wait_queue_t wait;
	long timeout;

	init_waitqueue_entry(&wait, current);

	mutex_lock(&mgr->msg_lock);
	/* send the message */
	err = send_msg(mgr, request, max_resp_size, 1, &msg_frame);  /* send and mark the answer pending */
	if (err) {
		mutex_unlock(&mgr->msg_lock);
		return err;
	}

	set_current_state(TASK_UNINTERRUPTIBLE);
	add_wait_queue(&mgr->msg_sleep, &wait);
	mutex_unlock(&mgr->msg_lock);
	timeout = schedule_timeout(MSG_TIMEOUT_JIFFIES);
	remove_wait_queue(&mgr->msg_sleep, &wait);

	if (! timeout) {
		/* error - no ack */
		dev_err(&mgr->pci->dev,
			"error: no response on msg %x\n", msg_frame);
		return -EIO;
	}

	/* retrieve the answer into the same struct mixart_msg */
	resp.message_id = 0;
	resp.uid = (struct mixart_uid){0,0};
	resp.data = resp_data;
	resp.size = max_resp_size;

	err = get_msg(mgr, &resp, msg_frame);

	if( request->message_id != resp.message_id )
		dev_err(&mgr->pci->dev, "RESPONSE ERROR!\n");

	return err;
}


int snd_mixart_send_msg_wait_notif(struct mixart_mgr *mgr,
				   struct mixart_msg *request, u32 notif_event)
{
	int err;
	wait_queue_t wait;
	long timeout;

	if (snd_BUG_ON(!notif_event))
		return -EINVAL;
	if (snd_BUG_ON((notif_event & MSG_TYPE_MASK) != MSG_TYPE_NOTIFY))
		return -EINVAL;
	if (snd_BUG_ON(notif_event & MSG_CANCEL_NOTIFY_MASK))
		return -EINVAL;

	init_waitqueue_entry(&wait, current);

	mutex_lock(&mgr->msg_lock);
	/* send the message */
	err = send_msg(mgr, request, MSG_DEFAULT_SIZE, 1, &notif_event);  /* send and mark the notification event pending */
	if(err) {
		mutex_unlock(&mgr->msg_lock);
		return err;
	}

	set_current_state(TASK_UNINTERRUPTIBLE);
	add_wait_queue(&mgr->msg_sleep, &wait);
	mutex_unlock(&mgr->msg_lock);
	timeout = schedule_timeout(MSG_TIMEOUT_JIFFIES);
	remove_wait_queue(&mgr->msg_sleep, &wait);

	if (! timeout) {
		/* error - no ack */
		dev_err(&mgr->pci->dev,
			"error: notification %x not received\n", notif_event);
		return -EIO;
	}

	return 0;
}


int snd_mixart_send_msg_nonblock(struct mixart_mgr *mgr, struct mixart_msg *request)
{
	u32 message_frame;
	int err;

	/* just send the message (do not mark it as a pending one) */
	mutex_lock(&mgr->msg_lock);
	err = send_msg(mgr, request, MSG_DEFAULT_SIZE, 0, &message_frame);
	mutex_unlock(&mgr->msg_lock);

	/* the answer will be handled by snd_struct mixart_msgasklet()  */
	atomic_inc(&mgr->msg_processed);

	return err;
}


/* common buffer of interrupt to send/receive messages */
static u32 mixart_msg_data[MSG_DEFAULT_SIZE / 4];


static void snd_mixart_process_msg(struct mixart_mgr *mgr)
{
	struct mixart_msg resp;
	u32 msg, addr, type;
	int err;

	while (mgr->msg_fifo_readptr != mgr->msg_fifo_writeptr) {
		msg = mgr->msg_fifo[mgr->msg_fifo_readptr];
		mgr->msg_fifo_readptr++;
		mgr->msg_fifo_readptr %= MSG_FIFO_SIZE;

		/* process the message ... */
		addr = msg & ~MSG_TYPE_MASK;
		type = msg & MSG_TYPE_MASK;

		switch (type) {
		case MSG_TYPE_ANSWER:
			/* answer to a message on that we did not wait for (send_msg_nonblock) */
			resp.message_id = 0;
			resp.data = mixart_msg_data;
			resp.size = sizeof(mixart_msg_data);
			err = get_msg(mgr, &resp, addr);
			if( err < 0 ) {
				dev_err(&mgr->pci->dev,
					"error(%d) reading mf %x\n",
					err, msg);
				break;
			}

			switch(resp.message_id) {
			case MSG_STREAM_START_INPUT_STAGE_PACKET:
			case MSG_STREAM_START_OUTPUT_STAGE_PACKET:
			case MSG_STREAM_STOP_INPUT_STAGE_PACKET:
			case MSG_STREAM_STOP_OUTPUT_STAGE_PACKET:
				if(mixart_msg_data[0])
					dev_err(&mgr->pci->dev,
						"error MSG_STREAM_ST***_***PUT_STAGE_PACKET status=%x\n",
						mixart_msg_data[0]);
				break;
			default:
				dev_dbg(&mgr->pci->dev,
					"received mf(%x) : msg_id(%x) uid(%x, %x) size(%zd)\n",
					   msg, resp.message_id, resp.uid.object_id, resp.uid.desc, resp.size);
				break;
			}
			break;
 		case MSG_TYPE_NOTIFY:
			/* msg contains no address ! do not get_msg() ! */
		case MSG_TYPE_COMMAND:
			/* get_msg() necessary */
		default:
			dev_err(&mgr->pci->dev,
				"doesn't know what to do with message %x\n",
				msg);
		} /* switch type */

		/* decrement counter */
		atomic_dec(&mgr->msg_processed);

	} /* while there is a msg in fifo */
}


irqreturn_t snd_mixart_interrupt(int irq, void *dev_id)
{
	struct mixart_mgr *mgr = dev_id;
	u32 it_reg;

	it_reg = readl_le(MIXART_REG(mgr, MIXART_PCI_OMISR_OFFSET));
	if( !(it_reg & MIXART_OIDI) ) {
		/* this device did not cause the interrupt */
		return IRQ_NONE;
	}

	/* mask all interrupts */
	writel_le(MIXART_HOST_ALL_INTERRUPT_MASKED, MIXART_REG(mgr, MIXART_PCI_OMIMR_OFFSET));

	/* outdoorbell register clear */
	it_reg = readl(MIXART_REG(mgr, MIXART_PCI_ODBR_OFFSET));
	writel(it_reg, MIXART_REG(mgr, MIXART_PCI_ODBR_OFFSET));

	/* clear interrupt */
	writel_le( MIXART_OIDI, MIXART_REG(mgr, MIXART_PCI_OMISR_OFFSET) );

	return IRQ_WAKE_THREAD;
}

irqreturn_t snd_mixart_threaded_irq(int irq, void *dev_id)
{
	struct mixart_mgr *mgr = dev_id;
	int err;
	struct mixart_msg resp;
	u32 msg;

	mutex_lock(&mgr->lock);
	/* process interrupt */
	while (retrieve_msg_frame(mgr, &msg)) {

		switch (msg & MSG_TYPE_MASK) {
		case MSG_TYPE_COMMAND:
			resp.message_id = 0;
			resp.data = mixart_msg_data;
			resp.size = sizeof(mixart_msg_data);
			err = get_msg(mgr, &resp, msg & ~MSG_TYPE_MASK);
			if( err < 0 ) {
				dev_err(&mgr->pci->dev,
					"interrupt: error(%d) reading mf %x\n",
					err, msg);
				break;
			}

			if(resp.message_id == MSG_SERVICES_TIMER_NOTIFY) {
				int i;
				struct mixart_timer_notify *notify;
				notify = (struct mixart_timer_notify *)mixart_msg_data;

				for(i=0; i<notify->stream_count; i++) {

					u32 buffer_id = notify->streams[i].buffer_id;
					unsigned int chip_number =  (buffer_id & MIXART_NOTIFY_CARD_MASK) >> MIXART_NOTIFY_CARD_OFFSET; /* card0 to 3 */
					unsigned int pcm_number  =  (buffer_id & MIXART_NOTIFY_PCM_MASK ) >> MIXART_NOTIFY_PCM_OFFSET;  /* pcm0 to 3  */
					unsigned int sub_number  =   buffer_id & MIXART_NOTIFY_SUBS_MASK;             /* 0 to MIXART_PLAYBACK_STREAMS */
					unsigned int is_capture  = ((buffer_id & MIXART_NOTIFY_CAPT_MASK) != 0);      /* playback == 0 / capture == 1 */

					struct snd_mixart *chip  = mgr->chip[chip_number];
					struct mixart_stream *stream;

					if ((chip_number >= mgr->num_cards) || (pcm_number >= MIXART_PCM_TOTAL) || (sub_number >= MIXART_PLAYBACK_STREAMS)) {
						dev_err(&mgr->pci->dev,
							"error MSG_SERVICES_TIMER_NOTIFY buffer_id (%x) pos(%d)\n",
							   buffer_id, notify->streams[i].sample_pos_low_part);
						break;
					}

					if (is_capture)
						stream = &chip->capture_stream[pcm_number];
					else
						stream = &chip->playback_stream[pcm_number][sub_number];

					if (stream->substream && (stream->status == MIXART_STREAM_STATUS_RUNNING)) {
						struct snd_pcm_runtime *runtime = stream->substream->runtime;
						int elapsed = 0;
						u64 sample_count = ((u64)notify->streams[i].sample_pos_high_part) << 32;
						sample_count |= notify->streams[i].sample_pos_low_part;

						while (1) {
							u64 new_elapse_pos = stream->abs_period_elapsed +  runtime->period_size;

							if (new_elapse_pos > sample_count) {
								break; /* while */
							}
							else {
								elapsed = 1;
								stream->buf_periods++;
								if (stream->buf_periods >= runtime->periods)
									stream->buf_periods = 0;

								stream->abs_period_elapsed = new_elapse_pos;
							}
						}
						stream->buf_period_frag = (u32)( sample_count - stream->abs_period_elapsed );

						if(elapsed) {
							mutex_unlock(&mgr->lock);
							snd_pcm_period_elapsed(stream->substream);
							mutex_lock(&mgr->lock);
						}
					}
				}
				break;
			}
			if(resp.message_id == MSG_SERVICES_REPORT_TRACES) {
				if(resp.size > 1) {
#ifndef __BIG_ENDIAN
					/* Traces are text: the swapped msg_data has to be swapped back ! */
					int i;
					for(i=0; i<(resp.size/4); i++) {
						(mixart_msg_data)[i] = cpu_to_be32((mixart_msg_data)[i]);
					}
#endif
					((char*)mixart_msg_data)[resp.size - 1] = 0;
					dev_dbg(&mgr->pci->dev,
						"MIXART TRACE : %s\n",
						(char *)mixart_msg_data);
				}
				break;
			}

			dev_dbg(&mgr->pci->dev, "command %x not handled\n",
				resp.message_id);
			break;

		case MSG_TYPE_NOTIFY:
			if(msg & MSG_CANCEL_NOTIFY_MASK) {
				msg &= ~MSG_CANCEL_NOTIFY_MASK;
				dev_err(&mgr->pci->dev,
					"canceled notification %x !\n", msg);
			}
			/* no break, continue ! */
		case MSG_TYPE_ANSWER:
			/* answer or notification to a message we are waiting for*/
			mutex_lock(&mgr->msg_lock);
			if( (msg & ~MSG_TYPE_MASK) == mgr->pending_event ) {
				wake_up(&mgr->msg_sleep);
				mgr->pending_event = 0;
			}
			/* answer to a message we did't want to wait for */
			else {
				mgr->msg_fifo[mgr->msg_fifo_writeptr] = msg;
				mgr->msg_fifo_writeptr++;
				mgr->msg_fifo_writeptr %= MSG_FIFO_SIZE;
				snd_mixart_process_msg(mgr);
			}
			mutex_unlock(&mgr->msg_lock);
			break;
		case MSG_TYPE_REQUEST:
		default:
			dev_dbg(&mgr->pci->dev,
				"interrupt received request %x\n", msg);
			/* TODO : are there things to do here ? */
			break;
		} /* switch on msg type */
	} /* while there are msgs */

	/* allow interrupt again */
	writel_le( MIXART_ALLOW_OUTBOUND_DOORBELL, MIXART_REG( mgr, MIXART_PCI_OMIMR_OFFSET));

	mutex_unlock(&mgr->lock);

	return IRQ_HANDLED;
}


void snd_mixart_init_mailbox(struct mixart_mgr *mgr)
{
	writel( 0, MIXART_MEM( mgr, MSG_HOST_RSC_PROTECTION ) );
	writel( 0, MIXART_MEM( mgr, MSG_AGENT_RSC_PROTECTION ) );

	/* allow outbound messagebox to generate interrupts */
	if(mgr->irq >= 0) {
		writel_le( MIXART_ALLOW_OUTBOUND_DOORBELL, MIXART_REG( mgr, MIXART_PCI_OMIMR_OFFSET));
	}
	return;
}

void snd_mixart_exit_mailbox(struct mixart_mgr *mgr)
{
	/* no more interrupts on outbound messagebox */
	writel_le( MIXART_HOST_ALL_INTERRUPT_MASKED, MIXART_REG( mgr, MIXART_PCI_OMIMR_OFFSET));
	return;
}

void snd_mixart_reset_board(struct mixart_mgr *mgr)
{
	/* reset miXart */
	writel_be( 1, MIXART_REG(mgr, MIXART_BA1_BRUTAL_RESET_OFFSET) );
	return;
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Driver for Digigram miXart soundcards
	3	*
	4	* low level interface with interrupt handling and mail box implementation
	5	*
	6	* Copyright (c) 2003 by Digigram <alsa@digigram.com>
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation; either version 2 of the License, or
	11	* (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program; if not, write to the Free Software
	20	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	21	*/
	22
1da177e4	23	#include <linux/interrupt.h>
62932df8	24	#include <linux/mutex.h>
6414e35d	25	#include <linux/pci.h>
6cbbfe1c	26	#include <linux/io.h>
62932df8	27
1da177e4 LT	28	#include <sound/core.h>
	29	#include "mixart.h"
	30	#include "mixart_hwdep.h"
	31	#include "mixart_core.h"
	32
	33
	34	#define MSG_TIMEOUT_JIFFIES (400 * HZ) / 1000 /* 400 ms */
	35
	36	#define MSG_DESCRIPTOR_SIZE 0x24
	37	#define MSG_HEADER_SIZE (MSG_DESCRIPTOR_SIZE + 4)
	38
	39	#define MSG_DEFAULT_SIZE 512
	40
	41	#define MSG_TYPE_MASK 0x00000003 /* mask for following types */
	42	#define MSG_TYPE_NOTIFY 0 /* embedded -> driver (only notification, do not get_msg() !) */
	43	#define MSG_TYPE_COMMAND 1 /* driver <-> embedded (a command has no answer) */
	44	#define MSG_TYPE_REQUEST 2 /* driver -> embedded (request will get an answer back) */
	45	#define MSG_TYPE_ANSWER 3 /* embedded -> driver */
	46	#define MSG_CANCEL_NOTIFY_MASK 0x80000000 /* this bit is set for a notification that has been canceled */
	47
	48
67b48b88	49	static int retrieve_msg_frame(struct mixart_mgr mgr, u32 msg_frame)
1da177e4 LT	50	{
	51	/* read the message frame fifo */
	52	u32 headptr, tailptr;
	53
	54	tailptr = readl_be(MIXART_MEM(mgr, MSG_OUTBOUND_POST_TAIL));
	55	headptr = readl_be(MIXART_MEM(mgr, MSG_OUTBOUND_POST_HEAD));
	56
	57	if (tailptr == headptr)
	58	return 0; /* no message posted */
	59
da3cec35 TI	60	if (tailptr < MSG_OUTBOUND_POST_STACK)
	61	return 0; /* error */
	62	if (tailptr >= MSG_OUTBOUND_POST_STACK + MSG_BOUND_STACK_SIZE)
	63	return 0; /* error */
1da177e4 LT	64
	65	*msg_frame = readl_be(MIXART_MEM(mgr, tailptr));
	66
	67	/* increment the tail index */
	68	tailptr += 4;
	69	if( tailptr >= (MSG_OUTBOUND_POST_STACK+MSG_BOUND_STACK_SIZE) )
	70	tailptr = MSG_OUTBOUND_POST_STACK;
	71	writel_be(tailptr, MIXART_MEM(mgr, MSG_OUTBOUND_POST_TAIL));
	72
	73	return 1;
	74	}
	75
67b48b88 TI	76	static int get_msg(struct mixart_mgr mgr, struct mixart_msg resp,
67b48b88 TI	77	u32 msg_frame_address )
1da177e4	78	{
1da177e4 LT	79	u32 headptr;
	80	u32 size;
	81	int err;
	82	#ifndef __BIG_ENDIAN
	83	unsigned int i;
	84	#endif
	85
8d3a8b5c	86	mutex_lock(&mgr->msg_lock);
1da177e4 LT	87	err = 0;
	88
	89	/* copy message descriptor from miXart to driver */
	90	size = readl_be(MIXART_MEM(mgr, msg_frame_address)); /* size of descriptor + response */
	91	resp->message_id = readl_be(MIXART_MEM(mgr, msg_frame_address + 4)); /* dwMessageID */
	92	resp->uid.object_id = readl_be(MIXART_MEM(mgr, msg_frame_address + 8)); /* uidDest */
	93	resp->uid.desc = readl_be(MIXART_MEM(mgr, msg_frame_address + 12)); /* */
	94
	95	if( (size < MSG_DESCRIPTOR_SIZE) \|\| (resp->size < (size - MSG_DESCRIPTOR_SIZE))) {
	96	err = -EINVAL;
6414e35d TI	97	dev_err(&mgr->pci->dev,
6414e35d TI	98	"problem with response size = %d\n", size);
1da177e4 LT	99	goto _clean_exit;
	100	}
	101	size -= MSG_DESCRIPTOR_SIZE;
	102
	103	memcpy_fromio(resp->data, MIXART_MEM(mgr, msg_frame_address + MSG_HEADER_SIZE ), size);
	104	resp->size = size;
	105
	106	/* swap if necessary */
	107	#ifndef __BIG_ENDIAN
	108	size /= 4; /* u32 size */
	109	for(i=0; i < size; i++) {
	110	((u32)resp->data)[i] = be32_to_cpu(((u32)resp->data)[i]);
	111	}
	112	#endif
	113
	114	/*
	115	* free message frame address
	116	*/
	117	headptr = readl_be(MIXART_MEM(mgr, MSG_OUTBOUND_FREE_HEAD));
	118
	119	if( (headptr < MSG_OUTBOUND_FREE_STACK) \|\| ( headptr >= (MSG_OUTBOUND_FREE_STACK+MSG_BOUND_STACK_SIZE))) {
	120	err = -EINVAL;
	121	goto _clean_exit;
	122	}
	123
	124	/* give address back to outbound fifo */
	125	writel_be(msg_frame_address, MIXART_MEM(mgr, headptr));
	126
	127	/* increment the outbound free head */
	128	headptr += 4;
	129	if( headptr >= (MSG_OUTBOUND_FREE_STACK+MSG_BOUND_STACK_SIZE) )
	130	headptr = MSG_OUTBOUND_FREE_STACK;
	131
	132	writel_be(headptr, MIXART_MEM(mgr, MSG_OUTBOUND_FREE_HEAD));
	133
	134	_clean_exit:
8d3a8b5c	135	mutex_unlock(&mgr->msg_lock);
1da177e4 LT	136
	137	return err;
	138	}
	139
	140
	141	/*
	142	* send a message to miXart. return: the msg_frame used for this message
	143	*/
	144	/* call with mgr->msg_lock held! */
67b48b88 TI	145	static int send_msg( struct mixart_mgr *mgr,
67b48b88 TI	146	struct mixart_msg *msg,
1da177e4 LT	147	int max_answersize,
	148	int mark_pending,
	149	u32 *msg_event)
	150	{
	151	u32 headptr, tailptr;
	152	u32 msg_frame_address;
330fb10d	153	int i;
1da177e4	154
da3cec35 TI	155	if (snd_BUG_ON(msg->size % 4))
da3cec35 TI	156	return -EINVAL;
1da177e4	157
1da177e4 LT	158	/* get message frame address */
	159	tailptr = readl_be(MIXART_MEM(mgr, MSG_INBOUND_FREE_TAIL));
	160	headptr = readl_be(MIXART_MEM(mgr, MSG_INBOUND_FREE_HEAD));
	161
	162	if (tailptr == headptr) {
6414e35d	163	dev_err(&mgr->pci->dev, "error: no message frame available\n");
1da177e4 LT	164	return -EBUSY;
	165	}
	166
	167	if( (tailptr < MSG_INBOUND_FREE_STACK) \|\| (tailptr >= (MSG_INBOUND_FREE_STACK+MSG_BOUND_STACK_SIZE))) {
	168	return -EINVAL;
	169	}
	170
	171	msg_frame_address = readl_be(MIXART_MEM(mgr, tailptr));
	172	writel(0, MIXART_MEM(mgr, tailptr)); /* set address to zero on this fifo position */
	173
	174	/* increment the inbound free tail */
	175	tailptr += 4;
	176	if( tailptr >= (MSG_INBOUND_FREE_STACK+MSG_BOUND_STACK_SIZE) )
	177	tailptr = MSG_INBOUND_FREE_STACK;
	178
	179	writel_be(tailptr, MIXART_MEM(mgr, MSG_INBOUND_FREE_TAIL));
	180
	181	/* TODO : use memcpy_toio() with intermediate buffer to copy the message */
	182
	183	/* copy message descriptor to card memory */
	184	writel_be( msg->size + MSG_DESCRIPTOR_SIZE, MIXART_MEM(mgr, msg_frame_address) ); /* size of descriptor + request */
	185	writel_be( msg->message_id , MIXART_MEM(mgr, msg_frame_address + 4) ); /* dwMessageID */
	186	writel_be( msg->uid.object_id, MIXART_MEM(mgr, msg_frame_address + 8) ); /* uidDest */
	187	writel_be( msg->uid.desc, MIXART_MEM(mgr, msg_frame_address + 12) ); /* */
	188	writel_be( MSG_DESCRIPTOR_SIZE, MIXART_MEM(mgr, msg_frame_address + 16) ); /* SizeHeader */
	189	writel_be( MSG_DESCRIPTOR_SIZE, MIXART_MEM(mgr, msg_frame_address + 20) ); /* OffsetDLL_T16 */
	190	writel_be( msg->size, MIXART_MEM(mgr, msg_frame_address + 24) ); /* SizeDLL_T16 */
	191	writel_be( MSG_DESCRIPTOR_SIZE, MIXART_MEM(mgr, msg_frame_address + 28) ); /* OffsetDLL_DRV */
	192	writel_be( 0, MIXART_MEM(mgr, msg_frame_address + 32) ); /* SizeDLL_DRV */
	193	writel_be( MSG_DESCRIPTOR_SIZE + max_answersize, MIXART_MEM(mgr, msg_frame_address + 36) ); /* dwExpectedAnswerSize */
	194
	195	/* copy message data to card memory */
	196	for( i=0; i < msg->size; i+=4 ) {
	197	writel_be( (u32)(msg->data + i), MIXART_MEM(mgr, MSG_HEADER_SIZE + msg_frame_address + i) );
	198	}
	199
	200	if( mark_pending ) {
	201	if( *msg_event ) {
	202	/* the pending event is the notification we wait for ! */
	203	mgr->pending_event = *msg_event;
	204	}
	205	else {
	206	/* the pending event is the answer we wait for (same address than the request)! */
	207	mgr->pending_event = msg_frame_address;
	208
	209	/* copy address back to caller */
	210	*msg_event = msg_frame_address;
	211	}
	212	}
	213
	214	/* mark the frame as a request (will have an answer) */
	215	msg_frame_address \|= MSG_TYPE_REQUEST;
	216
	217	/* post the frame */
	218	headptr = readl_be(MIXART_MEM(mgr, MSG_INBOUND_POST_HEAD));
	219
	220	if( (headptr < MSG_INBOUND_POST_STACK) \|\| (headptr >= (MSG_INBOUND_POST_STACK+MSG_BOUND_STACK_SIZE))) {
	221	return -EINVAL;
	222	}
	223
	224	writel_be(msg_frame_address, MIXART_MEM(mgr, headptr));
	225
	226	/* increment the inbound post head */
	227	headptr += 4;
228	if( headptr >= (MSG_INBOUND_POST_STACK+MSG_BOUND_STACK_SIZE) )
229	headptr = MSG_INBOUND_POST_STACK;
230
231	writel_be(headptr, MIXART_MEM(mgr, MSG_INBOUND_POST_HEAD));
232
233	return 0;
234	}
235
236
67b48b88	237	int snd_mixart_send_msg(struct mixart_mgr mgr, struct mixart_msg request, int max_resp_size, void *resp_data)
1da177e4	238	{
67b48b88	239	struct mixart_msg resp;
1da177e4 LT	240	u32 msg_frame = 0; /* set to 0, so it's no notification to wait for, but the answer */
	241	int err;
	242	wait_queue_t wait;
	243	long timeout;
	244
1da177e4 LT	245	init_waitqueue_entry(&wait, current);
1da177e4 LT	246
8d3a8b5c	247	mutex_lock(&mgr->msg_lock);
1da177e4 LT	248	/* send the message */
	249	err = send_msg(mgr, request, max_resp_size, 1, &msg_frame); /* send and mark the answer pending */
	250	if (err) {
8d3a8b5c	251	mutex_unlock(&mgr->msg_lock);
1da177e4 LT	252	return err;
	253	}
	254
	255	set_current_state(TASK_UNINTERRUPTIBLE);
	256	add_wait_queue(&mgr->msg_sleep, &wait);
8d3a8b5c	257	mutex_unlock(&mgr->msg_lock);
1da177e4 LT	258	timeout = schedule_timeout(MSG_TIMEOUT_JIFFIES);
	259	remove_wait_queue(&mgr->msg_sleep, &wait);
	260
	261	if (! timeout) {
	262	/* error - no ack */
6414e35d TI	263	dev_err(&mgr->pci->dev,
6414e35d TI	264	"error: no response on msg %x\n", msg_frame);
1da177e4 LT	265	return -EIO;
	266	}
	267
67b48b88	268	/* retrieve the answer into the same struct mixart_msg */
1da177e4	269	resp.message_id = 0;
67b48b88	270	resp.uid = (struct mixart_uid){0,0};
1da177e4 LT	271	resp.data = resp_data;
	272	resp.size = max_resp_size;
	273
	274	err = get_msg(mgr, &resp, msg_frame);
	275
	276	if( request->message_id != resp.message_id )
6414e35d	277	dev_err(&mgr->pci->dev, "RESPONSE ERROR!\n");
1da177e4	278
1da177e4 LT	279	return err;
	280	}
	281
	282
67b48b88 TI	283	int snd_mixart_send_msg_wait_notif(struct mixart_mgr *mgr,
67b48b88 TI	284	struct mixart_msg *request, u32 notif_event)
1da177e4 LT	285	{
	286	int err;
	287	wait_queue_t wait;
	288	long timeout;
	289
da3cec35 TI	290	if (snd_BUG_ON(!notif_event))
	291	return -EINVAL;
	292	if (snd_BUG_ON((notif_event & MSG_TYPE_MASK) != MSG_TYPE_NOTIFY))
	293	return -EINVAL;
	294	if (snd_BUG_ON(notif_event & MSG_CANCEL_NOTIFY_MASK))
	295	return -EINVAL;
1da177e4	296
1da177e4 LT	297	init_waitqueue_entry(&wait, current);
1da177e4 LT	298
8d3a8b5c	299	mutex_lock(&mgr->msg_lock);
1da177e4 LT	300	/* send the message */
	301	err = send_msg(mgr, request, MSG_DEFAULT_SIZE, 1, &notif_event); /* send and mark the notification event pending */
	302	if(err) {
8d3a8b5c	303	mutex_unlock(&mgr->msg_lock);
1da177e4 LT	304	return err;
	305	}
	306
	307	set_current_state(TASK_UNINTERRUPTIBLE);
	308	add_wait_queue(&mgr->msg_sleep, &wait);
8d3a8b5c	309	mutex_unlock(&mgr->msg_lock);
1da177e4 LT	310	timeout = schedule_timeout(MSG_TIMEOUT_JIFFIES);
	311	remove_wait_queue(&mgr->msg_sleep, &wait);
	312
	313	if (! timeout) {
	314	/* error - no ack */
6414e35d TI	315	dev_err(&mgr->pci->dev,
6414e35d TI	316	"error: notification %x not received\n", notif_event);
1da177e4 LT	317	return -EIO;
	318	}
	319
1da177e4 LT	320	return 0;
	321	}
	322
	323
67b48b88	324	int snd_mixart_send_msg_nonblock(struct mixart_mgr mgr, struct mixart_msg request)
1da177e4 LT	325	{
1da177e4 LT	326	u32 message_frame;
1da177e4 LT	327	int err;
	328
	329	/* just send the message (do not mark it as a pending one) */
8d3a8b5c	330	mutex_lock(&mgr->msg_lock);
1da177e4	331	err = send_msg(mgr, request, MSG_DEFAULT_SIZE, 0, &message_frame);
8d3a8b5c	332	mutex_unlock(&mgr->msg_lock);
1da177e4	333
67b48b88	334	/* the answer will be handled by snd_struct mixart_msgasklet() */
1da177e4 LT	335	atomic_inc(&mgr->msg_processed);
	336
	337	return err;
	338	}
	339
	340
8d3a8b5c	341	/* common buffer of interrupt to send/receive messages */
1da177e4 LT	342	static u32 mixart_msg_data[MSG_DEFAULT_SIZE / 4];
	343
	344
8d3a8b5c	345	static void snd_mixart_process_msg(struct mixart_mgr *mgr)
1da177e4	346	{
67b48b88	347	struct mixart_msg resp;
1da177e4 LT	348	u32 msg, addr, type;
	349	int err;
	350
1da177e4 LT	351	while (mgr->msg_fifo_readptr != mgr->msg_fifo_writeptr) {
	352	msg = mgr->msg_fifo[mgr->msg_fifo_readptr];
	353	mgr->msg_fifo_readptr++;
	354	mgr->msg_fifo_readptr %= MSG_FIFO_SIZE;
	355
	356	/* process the message ... */
	357	addr = msg & ~MSG_TYPE_MASK;
	358	type = msg & MSG_TYPE_MASK;
	359
	360	switch (type) {
	361	case MSG_TYPE_ANSWER:
	362	/* answer to a message on that we did not wait for (send_msg_nonblock) */
	363	resp.message_id = 0;
	364	resp.data = mixart_msg_data;
	365	resp.size = sizeof(mixart_msg_data);
	366	err = get_msg(mgr, &resp, addr);
	367	if( err < 0 ) {
6414e35d	368	dev_err(&mgr->pci->dev,
8d3a8b5c	369	"error(%d) reading mf %x\n",
6414e35d	370	err, msg);
1da177e4 LT	371	break;
	372	}
	373
	374	switch(resp.message_id) {
	375	case MSG_STREAM_START_INPUT_STAGE_PACKET:
	376	case MSG_STREAM_START_OUTPUT_STAGE_PACKET:
	377	case MSG_STREAM_STOP_INPUT_STAGE_PACKET:
	378	case MSG_STREAM_STOP_OUTPUT_STAGE_PACKET:
	379	if(mixart_msg_data[0])
6414e35d	380	dev_err(&mgr->pci->dev,
8d3a8b5c	381	"error MSG_STREAM_ST*_*PUT_STAGE_PACKET status=%x\n",
6414e35d	382	mixart_msg_data[0]);
1da177e4 LT	383	break;
1da177e4 LT	384	default:
6414e35d	385	dev_dbg(&mgr->pci->dev,
8d3a8b5c	386	"received mf(%x) : msg_id(%x) uid(%x, %x) size(%zd)\n",
1da177e4 LT	387	msg, resp.message_id, resp.uid.object_id, resp.uid.desc, resp.size);
	388	break;
	389	}
	390	break;
	391	case MSG_TYPE_NOTIFY:
	392	/* msg contains no address ! do not get_msg() ! */
	393	case MSG_TYPE_COMMAND:
	394	/* get_msg() necessary */
	395	default:
6414e35d	396	dev_err(&mgr->pci->dev,
8d3a8b5c	397	"doesn't know what to do with message %x\n",
6414e35d	398	msg);
1da177e4 LT	399	} /* switch type */
	400
	401	/* decrement counter */
	402	atomic_dec(&mgr->msg_processed);
	403
	404	} /* while there is a msg in fifo */
1da177e4 LT	405	}
	406
	407
7d12e780	408	irqreturn_t snd_mixart_interrupt(int irq, void *dev_id)
1da177e4	409	{
67b48b88	410	struct mixart_mgr *mgr = dev_id;
1da177e4 LT	411	u32 it_reg;
1da177e4 LT	412
1da177e4 LT	413	it_reg = readl_le(MIXART_REG(mgr, MIXART_PCI_OMISR_OFFSET));
	414	if( !(it_reg & MIXART_OIDI) ) {
	415	/* this device did not cause the interrupt */
1da177e4 LT	416	return IRQ_NONE;
	417	}
	418
	419	/* mask all interrupts */
	420	writel_le(MIXART_HOST_ALL_INTERRUPT_MASKED, MIXART_REG(mgr, MIXART_PCI_OMIMR_OFFSET));
	421
	422	/* outdoorbell register clear */
	423	it_reg = readl(MIXART_REG(mgr, MIXART_PCI_ODBR_OFFSET));
	424	writel(it_reg, MIXART_REG(mgr, MIXART_PCI_ODBR_OFFSET));
	425
	426	/* clear interrupt */
	427	writel_le( MIXART_OIDI, MIXART_REG(mgr, MIXART_PCI_OMISR_OFFSET) );
	428
8d3a8b5c TI	429	return IRQ_WAKE_THREAD;
	430	}
	431
	432	irqreturn_t snd_mixart_threaded_irq(int irq, void *dev_id)
	433	{
	434	struct mixart_mgr *mgr = dev_id;
	435	int err;
	436	struct mixart_msg resp;
	437	u32 msg;
	438
	439	mutex_lock(&mgr->lock);
1da177e4 LT	440	/* process interrupt */
	441	while (retrieve_msg_frame(mgr, &msg)) {
	442
	443	switch (msg & MSG_TYPE_MASK) {
	444	case MSG_TYPE_COMMAND:
	445	resp.message_id = 0;
	446	resp.data = mixart_msg_data;
	447	resp.size = sizeof(mixart_msg_data);
	448	err = get_msg(mgr, &resp, msg & ~MSG_TYPE_MASK);
	449	if( err < 0 ) {
6414e35d TI	450	dev_err(&mgr->pci->dev,
	451	"interrupt: error(%d) reading mf %x\n",
	452	err, msg);
1da177e4 LT	453	break;
	454	}
	455
	456	if(resp.message_id == MSG_SERVICES_TIMER_NOTIFY) {
	457	int i;
67b48b88 TI	458	struct mixart_timer_notify *notify;
67b48b88 TI	459	notify = (struct mixart_timer_notify *)mixart_msg_data;
1da177e4 LT	460
	461	for(i=0; i<notify->stream_count; i++) {
	462
	463	u32 buffer_id = notify->streams[i].buffer_id;
	464	unsigned int chip_number = (buffer_id & MIXART_NOTIFY_CARD_MASK) >> MIXART_NOTIFY_CARD_OFFSET; /* card0 to 3 */
	465	unsigned int pcm_number = (buffer_id & MIXART_NOTIFY_PCM_MASK ) >> MIXART_NOTIFY_PCM_OFFSET; /* pcm0 to 3 */
	466	unsigned int sub_number = buffer_id & MIXART_NOTIFY_SUBS_MASK; /* 0 to MIXART_PLAYBACK_STREAMS */
	467	unsigned int is_capture = ((buffer_id & MIXART_NOTIFY_CAPT_MASK) != 0); /* playback == 0 / capture == 1 */
	468
67b48b88 TI	469	struct snd_mixart *chip = mgr->chip[chip_number];
67b48b88 TI	470	struct mixart_stream *stream;
1da177e4 LT	471
1da177e4 LT	472	if ((chip_number >= mgr->num_cards) \|\| (pcm_number >= MIXART_PCM_TOTAL) \|\| (sub_number >= MIXART_PLAYBACK_STREAMS)) {
6414e35d TI	473	dev_err(&mgr->pci->dev,
6414e35d TI	474	"error MSG_SERVICES_TIMER_NOTIFY buffer_id (%x) pos(%d)\n",
1da177e4 LT	475	buffer_id, notify->streams[i].sample_pos_low_part);
	476	break;
	477	}
	478
	479	if (is_capture)
	480	stream = &chip->capture_stream[pcm_number];
	481	else
	482	stream = &chip->playback_stream[pcm_number][sub_number];
	483
	484	if (stream->substream && (stream->status == MIXART_STREAM_STATUS_RUNNING)) {
67b48b88	485	struct snd_pcm_runtime *runtime = stream->substream->runtime;
1da177e4 LT	486	int elapsed = 0;
	487	u64 sample_count = ((u64)notify->streams[i].sample_pos_high_part) << 32;
	488	sample_count \|= notify->streams[i].sample_pos_low_part;
	489
	490	while (1) {
	491	u64 new_elapse_pos = stream->abs_period_elapsed + runtime->period_size;
	492
	493	if (new_elapse_pos > sample_count) {
	494	break; /* while */
	495	}
	496	else {
	497	elapsed = 1;
	498	stream->buf_periods++;
	499	if (stream->buf_periods >= runtime->periods)
	500	stream->buf_periods = 0;
	501
	502	stream->abs_period_elapsed = new_elapse_pos;
	503	}
	504	}
	505	stream->buf_period_frag = (u32)( sample_count - stream->abs_period_elapsed );
	506
	507	if(elapsed) {
8d3a8b5c	508	mutex_unlock(&mgr->lock);
1da177e4	509	snd_pcm_period_elapsed(stream->substream);
8d3a8b5c	510	mutex_lock(&mgr->lock);
1da177e4 LT	511	}
	512	}
	513	}
	514	break;
	515	}
	516	if(resp.message_id == MSG_SERVICES_REPORT_TRACES) {
	517	if(resp.size > 1) {
	518	#ifndef __BIG_ENDIAN
	519	/* Traces are text: the swapped msg_data has to be swapped back ! */
	520	int i;
	521	for(i=0; i<(resp.size/4); i++) {
	522	(mixart_msg_data)[i] = cpu_to_be32((mixart_msg_data)[i]);
	523	}
	524	#endif
	525	((char*)mixart_msg_data)[resp.size - 1] = 0;
6414e35d TI	526	dev_dbg(&mgr->pci->dev,
	527	"MIXART TRACE : %s\n",
	528	(char *)mixart_msg_data);
1da177e4 LT	529	}
	530	break;
	531	}
	532
6414e35d TI	533	dev_dbg(&mgr->pci->dev, "command %x not handled\n",
6414e35d TI	534	resp.message_id);
1da177e4 LT	535	break;
	536
	537	case MSG_TYPE_NOTIFY:
	538	if(msg & MSG_CANCEL_NOTIFY_MASK) {
	539	msg &= ~MSG_CANCEL_NOTIFY_MASK;
6414e35d TI	540	dev_err(&mgr->pci->dev,
6414e35d TI	541	"canceled notification %x !\n", msg);
1da177e4 LT	542	}
	543	/* no break, continue ! */
	544	case MSG_TYPE_ANSWER:
	545	/* answer or notification to a message we are waiting for*/
8d3a8b5c	546	mutex_lock(&mgr->msg_lock);
1da177e4 LT	547	if( (msg & ~MSG_TYPE_MASK) == mgr->pending_event ) {
	548	wake_up(&mgr->msg_sleep);
	549	mgr->pending_event = 0;
	550	}
	551	/* answer to a message we did't want to wait for */
	552	else {
	553	mgr->msg_fifo[mgr->msg_fifo_writeptr] = msg;
	554	mgr->msg_fifo_writeptr++;
	555	mgr->msg_fifo_writeptr %= MSG_FIFO_SIZE;
8d3a8b5c	556	snd_mixart_process_msg(mgr);
1da177e4	557	}
8d3a8b5c	558	mutex_unlock(&mgr->msg_lock);
1da177e4 LT	559	break;
	560	case MSG_TYPE_REQUEST:
	561	default:
6414e35d TI	562	dev_dbg(&mgr->pci->dev,
6414e35d TI	563	"interrupt received request %x\n", msg);
1da177e4 LT	564	/* TODO : are there things to do here ? */
	565	break;
	566	} /* switch on msg type */
	567	} /* while there are msgs */
	568
	569	/* allow interrupt again */
	570	writel_le( MIXART_ALLOW_OUTBOUND_DOORBELL, MIXART_REG( mgr, MIXART_PCI_OMIMR_OFFSET));
	571
8d3a8b5c	572	mutex_unlock(&mgr->lock);
1da177e4 LT	573
	574	return IRQ_HANDLED;
	575	}
	576
	577
67b48b88	578	void snd_mixart_init_mailbox(struct mixart_mgr *mgr)
1da177e4 LT	579	{
	580	writel( 0, MIXART_MEM( mgr, MSG_HOST_RSC_PROTECTION ) );
	581	writel( 0, MIXART_MEM( mgr, MSG_AGENT_RSC_PROTECTION ) );
	582
	583	/* allow outbound messagebox to generate interrupts */
	584	if(mgr->irq >= 0) {
	585	writel_le( MIXART_ALLOW_OUTBOUND_DOORBELL, MIXART_REG( mgr, MIXART_PCI_OMIMR_OFFSET));
	586	}
	587	return;
	588	}
	589
67b48b88	590	void snd_mixart_exit_mailbox(struct mixart_mgr *mgr)
1da177e4 LT	591	{
	592	/* no more interrupts on outbound messagebox */
	593	writel_le( MIXART_HOST_ALL_INTERRUPT_MASKED, MIXART_REG( mgr, MIXART_PCI_OMIMR_OFFSET));
	594	return;
	595	}
	596
67b48b88	597	void snd_mixart_reset_board(struct mixart_mgr *mgr)
1da177e4 LT	598	{
	599	/* reset miXart */
	600	writel_be( 1, MIXART_REG(mgr, MIXART_BA1_BRUTAL_RESET_OFFSET) );
	601	return;
	602	}