590 строки
17 KiB
C
590 строки
17 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Driver for Digigram miXart soundcards
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*
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* low level interface with interrupt handling and mail box implementation
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*
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* Copyright (c) 2003 by Digigram <alsa@digigram.com>
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*/
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#include <linux/interrupt.h>
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#include <linux/mutex.h>
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#include <linux/pci.h>
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#include <linux/io.h>
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#include <sound/core.h>
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#include "mixart.h"
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#include "mixart_hwdep.h"
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#include "mixart_core.h"
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#define MSG_TIMEOUT_JIFFIES (400 * HZ) / 1000 /* 400 ms */
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#define MSG_DESCRIPTOR_SIZE 0x24
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#define MSG_HEADER_SIZE (MSG_DESCRIPTOR_SIZE + 4)
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#define MSG_DEFAULT_SIZE 512
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#define MSG_TYPE_MASK 0x00000003 /* mask for following types */
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#define MSG_TYPE_NOTIFY 0 /* embedded -> driver (only notification, do not get_msg() !) */
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#define MSG_TYPE_COMMAND 1 /* driver <-> embedded (a command has no answer) */
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#define MSG_TYPE_REQUEST 2 /* driver -> embedded (request will get an answer back) */
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#define MSG_TYPE_ANSWER 3 /* embedded -> driver */
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#define MSG_CANCEL_NOTIFY_MASK 0x80000000 /* this bit is set for a notification that has been canceled */
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static int retrieve_msg_frame(struct mixart_mgr *mgr, u32 *msg_frame)
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{
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/* read the message frame fifo */
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u32 headptr, tailptr;
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tailptr = readl_be(MIXART_MEM(mgr, MSG_OUTBOUND_POST_TAIL));
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headptr = readl_be(MIXART_MEM(mgr, MSG_OUTBOUND_POST_HEAD));
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if (tailptr == headptr)
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return 0; /* no message posted */
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if (tailptr < MSG_OUTBOUND_POST_STACK)
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return 0; /* error */
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if (tailptr >= MSG_OUTBOUND_POST_STACK + MSG_BOUND_STACK_SIZE)
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return 0; /* error */
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*msg_frame = readl_be(MIXART_MEM(mgr, tailptr));
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/* increment the tail index */
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tailptr += 4;
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if( tailptr >= (MSG_OUTBOUND_POST_STACK+MSG_BOUND_STACK_SIZE) )
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tailptr = MSG_OUTBOUND_POST_STACK;
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writel_be(tailptr, MIXART_MEM(mgr, MSG_OUTBOUND_POST_TAIL));
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return 1;
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}
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static int get_msg(struct mixart_mgr *mgr, struct mixart_msg *resp,
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u32 msg_frame_address )
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{
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u32 headptr;
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u32 size;
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int err;
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#ifndef __BIG_ENDIAN
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unsigned int i;
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#endif
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mutex_lock(&mgr->msg_lock);
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err = 0;
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/* copy message descriptor from miXart to driver */
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size = readl_be(MIXART_MEM(mgr, msg_frame_address)); /* size of descriptor + response */
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resp->message_id = readl_be(MIXART_MEM(mgr, msg_frame_address + 4)); /* dwMessageID */
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resp->uid.object_id = readl_be(MIXART_MEM(mgr, msg_frame_address + 8)); /* uidDest */
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resp->uid.desc = readl_be(MIXART_MEM(mgr, msg_frame_address + 12)); /* */
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if( (size < MSG_DESCRIPTOR_SIZE) || (resp->size < (size - MSG_DESCRIPTOR_SIZE))) {
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err = -EINVAL;
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dev_err(&mgr->pci->dev,
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"problem with response size = %d\n", size);
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goto _clean_exit;
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}
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size -= MSG_DESCRIPTOR_SIZE;
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memcpy_fromio(resp->data, MIXART_MEM(mgr, msg_frame_address + MSG_HEADER_SIZE ), size);
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resp->size = size;
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/* swap if necessary */
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#ifndef __BIG_ENDIAN
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size /= 4; /* u32 size */
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for(i=0; i < size; i++) {
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((u32*)resp->data)[i] = be32_to_cpu(((__be32*)resp->data)[i]);
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}
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#endif
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/*
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* free message frame address
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*/
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headptr = readl_be(MIXART_MEM(mgr, MSG_OUTBOUND_FREE_HEAD));
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if( (headptr < MSG_OUTBOUND_FREE_STACK) || ( headptr >= (MSG_OUTBOUND_FREE_STACK+MSG_BOUND_STACK_SIZE))) {
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err = -EINVAL;
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goto _clean_exit;
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}
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/* give address back to outbound fifo */
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writel_be(msg_frame_address, MIXART_MEM(mgr, headptr));
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/* increment the outbound free head */
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headptr += 4;
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if( headptr >= (MSG_OUTBOUND_FREE_STACK+MSG_BOUND_STACK_SIZE) )
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headptr = MSG_OUTBOUND_FREE_STACK;
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writel_be(headptr, MIXART_MEM(mgr, MSG_OUTBOUND_FREE_HEAD));
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_clean_exit:
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mutex_unlock(&mgr->msg_lock);
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return err;
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}
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/*
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* send a message to miXart. return: the msg_frame used for this message
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*/
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/* call with mgr->msg_lock held! */
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static int send_msg( struct mixart_mgr *mgr,
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struct mixart_msg *msg,
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int max_answersize,
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int mark_pending,
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u32 *msg_event)
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{
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u32 headptr, tailptr;
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u32 msg_frame_address;
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int i;
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if (snd_BUG_ON(msg->size % 4))
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return -EINVAL;
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/* get message frame address */
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tailptr = readl_be(MIXART_MEM(mgr, MSG_INBOUND_FREE_TAIL));
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headptr = readl_be(MIXART_MEM(mgr, MSG_INBOUND_FREE_HEAD));
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if (tailptr == headptr) {
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dev_err(&mgr->pci->dev, "error: no message frame available\n");
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return -EBUSY;
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}
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if( (tailptr < MSG_INBOUND_FREE_STACK) || (tailptr >= (MSG_INBOUND_FREE_STACK+MSG_BOUND_STACK_SIZE))) {
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return -EINVAL;
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}
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msg_frame_address = readl_be(MIXART_MEM(mgr, tailptr));
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writel(0, MIXART_MEM(mgr, tailptr)); /* set address to zero on this fifo position */
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/* increment the inbound free tail */
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tailptr += 4;
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if( tailptr >= (MSG_INBOUND_FREE_STACK+MSG_BOUND_STACK_SIZE) )
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tailptr = MSG_INBOUND_FREE_STACK;
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writel_be(tailptr, MIXART_MEM(mgr, MSG_INBOUND_FREE_TAIL));
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/* TODO : use memcpy_toio() with intermediate buffer to copy the message */
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/* copy message descriptor to card memory */
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writel_be( msg->size + MSG_DESCRIPTOR_SIZE, MIXART_MEM(mgr, msg_frame_address) ); /* size of descriptor + request */
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writel_be( msg->message_id , MIXART_MEM(mgr, msg_frame_address + 4) ); /* dwMessageID */
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writel_be( msg->uid.object_id, MIXART_MEM(mgr, msg_frame_address + 8) ); /* uidDest */
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writel_be( msg->uid.desc, MIXART_MEM(mgr, msg_frame_address + 12) ); /* */
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writel_be( MSG_DESCRIPTOR_SIZE, MIXART_MEM(mgr, msg_frame_address + 16) ); /* SizeHeader */
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writel_be( MSG_DESCRIPTOR_SIZE, MIXART_MEM(mgr, msg_frame_address + 20) ); /* OffsetDLL_T16 */
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writel_be( msg->size, MIXART_MEM(mgr, msg_frame_address + 24) ); /* SizeDLL_T16 */
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writel_be( MSG_DESCRIPTOR_SIZE, MIXART_MEM(mgr, msg_frame_address + 28) ); /* OffsetDLL_DRV */
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writel_be( 0, MIXART_MEM(mgr, msg_frame_address + 32) ); /* SizeDLL_DRV */
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writel_be( MSG_DESCRIPTOR_SIZE + max_answersize, MIXART_MEM(mgr, msg_frame_address + 36) ); /* dwExpectedAnswerSize */
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/* copy message data to card memory */
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for( i=0; i < msg->size; i+=4 ) {
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writel_be( *(u32*)(msg->data + i), MIXART_MEM(mgr, MSG_HEADER_SIZE + msg_frame_address + i) );
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}
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if( mark_pending ) {
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if( *msg_event ) {
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/* the pending event is the notification we wait for ! */
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mgr->pending_event = *msg_event;
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}
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else {
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/* the pending event is the answer we wait for (same address than the request)! */
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mgr->pending_event = msg_frame_address;
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/* copy address back to caller */
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*msg_event = msg_frame_address;
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}
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}
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/* mark the frame as a request (will have an answer) */
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msg_frame_address |= MSG_TYPE_REQUEST;
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/* post the frame */
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headptr = readl_be(MIXART_MEM(mgr, MSG_INBOUND_POST_HEAD));
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if( (headptr < MSG_INBOUND_POST_STACK) || (headptr >= (MSG_INBOUND_POST_STACK+MSG_BOUND_STACK_SIZE))) {
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return -EINVAL;
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}
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writel_be(msg_frame_address, MIXART_MEM(mgr, headptr));
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/* increment the inbound post head */
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headptr += 4;
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if( headptr >= (MSG_INBOUND_POST_STACK+MSG_BOUND_STACK_SIZE) )
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headptr = MSG_INBOUND_POST_STACK;
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writel_be(headptr, MIXART_MEM(mgr, MSG_INBOUND_POST_HEAD));
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return 0;
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}
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int snd_mixart_send_msg(struct mixart_mgr *mgr, struct mixart_msg *request, int max_resp_size, void *resp_data)
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{
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struct mixart_msg resp;
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u32 msg_frame = 0; /* set to 0, so it's no notification to wait for, but the answer */
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int err;
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wait_queue_entry_t wait;
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long timeout;
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init_waitqueue_entry(&wait, current);
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mutex_lock(&mgr->msg_lock);
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/* send the message */
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err = send_msg(mgr, request, max_resp_size, 1, &msg_frame); /* send and mark the answer pending */
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if (err) {
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mutex_unlock(&mgr->msg_lock);
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return err;
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}
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set_current_state(TASK_UNINTERRUPTIBLE);
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add_wait_queue(&mgr->msg_sleep, &wait);
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mutex_unlock(&mgr->msg_lock);
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timeout = schedule_timeout(MSG_TIMEOUT_JIFFIES);
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remove_wait_queue(&mgr->msg_sleep, &wait);
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if (! timeout) {
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/* error - no ack */
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dev_err(&mgr->pci->dev,
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"error: no response on msg %x\n", msg_frame);
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return -EIO;
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}
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/* retrieve the answer into the same struct mixart_msg */
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resp.message_id = 0;
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resp.uid = (struct mixart_uid){0,0};
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resp.data = resp_data;
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resp.size = max_resp_size;
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err = get_msg(mgr, &resp, msg_frame);
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if( request->message_id != resp.message_id )
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dev_err(&mgr->pci->dev, "RESPONSE ERROR!\n");
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return err;
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}
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int snd_mixart_send_msg_wait_notif(struct mixart_mgr *mgr,
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struct mixart_msg *request, u32 notif_event)
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{
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int err;
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wait_queue_entry_t wait;
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long timeout;
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if (snd_BUG_ON(!notif_event))
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return -EINVAL;
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if (snd_BUG_ON((notif_event & MSG_TYPE_MASK) != MSG_TYPE_NOTIFY))
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return -EINVAL;
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if (snd_BUG_ON(notif_event & MSG_CANCEL_NOTIFY_MASK))
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return -EINVAL;
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init_waitqueue_entry(&wait, current);
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mutex_lock(&mgr->msg_lock);
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/* send the message */
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err = send_msg(mgr, request, MSG_DEFAULT_SIZE, 1, ¬if_event); /* send and mark the notification event pending */
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if(err) {
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mutex_unlock(&mgr->msg_lock);
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return err;
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}
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set_current_state(TASK_UNINTERRUPTIBLE);
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add_wait_queue(&mgr->msg_sleep, &wait);
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mutex_unlock(&mgr->msg_lock);
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timeout = schedule_timeout(MSG_TIMEOUT_JIFFIES);
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remove_wait_queue(&mgr->msg_sleep, &wait);
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if (! timeout) {
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/* error - no ack */
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dev_err(&mgr->pci->dev,
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"error: notification %x not received\n", notif_event);
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return -EIO;
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}
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return 0;
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}
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int snd_mixart_send_msg_nonblock(struct mixart_mgr *mgr, struct mixart_msg *request)
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{
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u32 message_frame;
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int err;
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/* just send the message (do not mark it as a pending one) */
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mutex_lock(&mgr->msg_lock);
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err = send_msg(mgr, request, MSG_DEFAULT_SIZE, 0, &message_frame);
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mutex_unlock(&mgr->msg_lock);
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/* the answer will be handled by snd_struct mixart_msgasklet() */
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atomic_inc(&mgr->msg_processed);
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return err;
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}
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/* common buffer of interrupt to send/receive messages */
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static u32 mixart_msg_data[MSG_DEFAULT_SIZE / 4];
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static void snd_mixart_process_msg(struct mixart_mgr *mgr)
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{
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struct mixart_msg resp;
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u32 msg, addr, type;
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int err;
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while (mgr->msg_fifo_readptr != mgr->msg_fifo_writeptr) {
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msg = mgr->msg_fifo[mgr->msg_fifo_readptr];
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mgr->msg_fifo_readptr++;
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mgr->msg_fifo_readptr %= MSG_FIFO_SIZE;
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/* process the message ... */
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addr = msg & ~MSG_TYPE_MASK;
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type = msg & MSG_TYPE_MASK;
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switch (type) {
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case MSG_TYPE_ANSWER:
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/* answer to a message on that we did not wait for (send_msg_nonblock) */
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resp.message_id = 0;
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resp.data = mixart_msg_data;
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resp.size = sizeof(mixart_msg_data);
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err = get_msg(mgr, &resp, addr);
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if( err < 0 ) {
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dev_err(&mgr->pci->dev,
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"error(%d) reading mf %x\n",
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err, msg);
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break;
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}
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switch(resp.message_id) {
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case MSG_STREAM_START_INPUT_STAGE_PACKET:
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case MSG_STREAM_START_OUTPUT_STAGE_PACKET:
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case MSG_STREAM_STOP_INPUT_STAGE_PACKET:
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case MSG_STREAM_STOP_OUTPUT_STAGE_PACKET:
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if(mixart_msg_data[0])
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dev_err(&mgr->pci->dev,
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"error MSG_STREAM_ST***_***PUT_STAGE_PACKET status=%x\n",
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mixart_msg_data[0]);
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break;
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default:
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dev_dbg(&mgr->pci->dev,
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"received mf(%x) : msg_id(%x) uid(%x, %x) size(%zd)\n",
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msg, resp.message_id, resp.uid.object_id, resp.uid.desc, resp.size);
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break;
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}
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break;
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case MSG_TYPE_NOTIFY:
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/* msg contains no address ! do not get_msg() ! */
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case MSG_TYPE_COMMAND:
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/* get_msg() necessary */
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default:
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dev_err(&mgr->pci->dev,
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"doesn't know what to do with message %x\n",
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msg);
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} /* switch type */
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/* decrement counter */
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atomic_dec(&mgr->msg_processed);
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} /* while there is a msg in fifo */
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}
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irqreturn_t snd_mixart_interrupt(int irq, void *dev_id)
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{
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struct mixart_mgr *mgr = dev_id;
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u32 it_reg;
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it_reg = readl_le(MIXART_REG(mgr, MIXART_PCI_OMISR_OFFSET));
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if( !(it_reg & MIXART_OIDI) ) {
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/* this device did not cause the interrupt */
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return IRQ_NONE;
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}
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/* mask all interrupts */
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writel_le(MIXART_HOST_ALL_INTERRUPT_MASKED, MIXART_REG(mgr, MIXART_PCI_OMIMR_OFFSET));
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/* outdoorbell register clear */
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it_reg = readl(MIXART_REG(mgr, MIXART_PCI_ODBR_OFFSET));
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writel(it_reg, MIXART_REG(mgr, MIXART_PCI_ODBR_OFFSET));
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/* clear interrupt */
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writel_le( MIXART_OIDI, MIXART_REG(mgr, MIXART_PCI_OMISR_OFFSET) );
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return IRQ_WAKE_THREAD;
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}
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irqreturn_t snd_mixart_threaded_irq(int irq, void *dev_id)
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{
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struct mixart_mgr *mgr = dev_id;
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int err;
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struct mixart_msg resp;
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u32 msg;
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mutex_lock(&mgr->lock);
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/* process interrupt */
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while (retrieve_msg_frame(mgr, &msg)) {
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switch (msg & MSG_TYPE_MASK) {
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case MSG_TYPE_COMMAND:
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resp.message_id = 0;
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resp.data = mixart_msg_data;
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resp.size = sizeof(mixart_msg_data);
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err = get_msg(mgr, &resp, msg & ~MSG_TYPE_MASK);
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if( err < 0 ) {
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dev_err(&mgr->pci->dev,
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"interrupt: error(%d) reading mf %x\n",
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err, msg);
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break;
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}
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if(resp.message_id == MSG_SERVICES_TIMER_NOTIFY) {
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int i;
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struct mixart_timer_notify *notify;
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notify = (struct mixart_timer_notify *)mixart_msg_data;
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for(i=0; i<notify->stream_count; i++) {
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u32 buffer_id = notify->streams[i].buffer_id;
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unsigned int chip_number = (buffer_id & MIXART_NOTIFY_CARD_MASK) >> MIXART_NOTIFY_CARD_OFFSET; /* card0 to 3 */
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unsigned int pcm_number = (buffer_id & MIXART_NOTIFY_PCM_MASK ) >> MIXART_NOTIFY_PCM_OFFSET; /* pcm0 to 3 */
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unsigned int sub_number = buffer_id & MIXART_NOTIFY_SUBS_MASK; /* 0 to MIXART_PLAYBACK_STREAMS */
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unsigned int is_capture = ((buffer_id & MIXART_NOTIFY_CAPT_MASK) != 0); /* playback == 0 / capture == 1 */
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struct snd_mixart *chip = mgr->chip[chip_number];
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struct mixart_stream *stream;
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if ((chip_number >= mgr->num_cards) || (pcm_number >= MIXART_PCM_TOTAL) || (sub_number >= MIXART_PLAYBACK_STREAMS)) {
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dev_err(&mgr->pci->dev,
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"error MSG_SERVICES_TIMER_NOTIFY buffer_id (%x) pos(%d)\n",
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|
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++) {
|
|
((__be32*)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);
|
|
}
|
|
/* fall through */
|
|
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;
|
|
}
|