- 根目录:
- sound
- soc
- intel
- atom
- sst
- sst_ipc.c
/*
* sst_ipc.c - Intel SST Driver for audio engine
*
* Copyright (C) 2008-14 Intel Corporation
* Authors: Vinod Koul <vinod.koul@intel.com>
* Harsha Priya <priya.harsha@intel.com>
* Dharageswari R <dharageswari.r@intel.com>
* KP Jeeja <jeeja.kp@intel.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; version 2 of the License.
*
* 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.
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*/
#include <linux/pci.h>
#include <linux/firmware.h>
#include <linux/sched.h>
#include <linux/delay.h>
#include <linux/pm_runtime.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <sound/compress_driver.h>
#include <asm/intel-mid.h>
#include <asm/platform_sst_audio.h>
#include "../sst-mfld-platform.h"
#include "sst.h"
#include "../../common/sst-dsp.h"
struct sst_block *sst_create_block(struct intel_sst_drv *ctx,
u32 msg_id, u32 drv_id)
{
struct sst_block *msg = NULL;
dev_dbg(ctx->dev, "Enter\n");
msg = kzalloc(sizeof(*msg), GFP_KERNEL);
if (!msg)
return NULL;
msg->condition = false;
msg->on = true;
msg->msg_id = msg_id;
msg->drv_id = drv_id;
spin_lock_bh(&ctx->block_lock);
list_add_tail(&msg->node, &ctx->block_list);
spin_unlock_bh(&ctx->block_lock);
return msg;
}
/*
* while handling the interrupts, we need to check for message status and
* then if we are blocking for a message
*
* here we are unblocking the blocked ones, this is based on id we have
* passed and search that for block threads.
* We will not find block in two cases
* a) when its small message and block in not there, so silently ignore
* them
* b) when we are actually not able to find the block (bug perhaps)
*
* Since we have bit of small messages we can spam kernel log with err
* print on above so need to keep as debug prints which should be enabled
* via dynamic debug while debugging IPC issues
*/
int sst_wake_up_block(struct intel_sst_drv *ctx, int result,
u32 drv_id, u32 ipc, void *data, u32 size)
{
struct sst_block *block = NULL;
dev_dbg(ctx->dev, "Enter\n");
spin_lock_bh(&ctx->block_lock);
list_for_each_entry(block, &ctx->block_list, node) {
dev_dbg(ctx->dev, "Block ipc %d, drv_id %d\n", block->msg_id,
block->drv_id);
if (block->msg_id == ipc && block->drv_id == drv_id) {
dev_dbg(ctx->dev, "free up the block\n");
block->ret_code = result;
block->data = data;
block->size = size;
block->condition = true;
spin_unlock_bh(&ctx->block_lock);
wake_up(&ctx->wait_queue);
return 0;
}
}
spin_unlock_bh(&ctx->block_lock);
dev_dbg(ctx->dev,
"Block not found or a response received for a short msg for ipc %d, drv_id %d\n",
ipc, drv_id);
return -EINVAL;
}
int sst_free_block(struct intel_sst_drv *ctx, struct sst_block *freed)
{
struct sst_block *block = NULL, *__block;
dev_dbg(ctx->dev, "Enter\n");
spin_lock_bh(&ctx->block_lock);
list_for_each_entry_safe(block, __block, &ctx->block_list, node) {
if (block == freed) {
pr_debug("pvt_id freed --> %d\n", freed->drv_id);
/* toggle the index position of pvt_id */
list_del(&freed->node);
spin_unlock_bh(&ctx->block_lock);
kfree(freed->data);
freed->data = NULL;
kfree(freed);
return 0;
}
}
spin_unlock_bh(&ctx->block_lock);
dev_err(ctx->dev, "block is already freed!!!\n");
return -EINVAL;
}
int sst_post_message_mrfld(struct intel_sst_drv *sst_drv_ctx,
struct ipc_post *ipc_msg, bool sync)
{
struct ipc_post *msg = ipc_msg;
union ipc_header_mrfld header;
unsigned int loop_count = 0;
int retval = 0;
unsigned long irq_flags;
dev_dbg(sst_drv_ctx->dev, "Enter: sync: %d\n", sync);
spin_lock_irqsave(&sst_drv_ctx->ipc_spin_lock, irq_flags);
header.full = sst_shim_read64(sst_drv_ctx->shim, SST_IPCX);
if (sync) {
while (header.p.header_high.part.busy) {
if (loop_count > 25) {
dev_err(sst_drv_ctx->dev,
"sst: Busy wait failed, cant send this msg\n");
retval = -EBUSY;
goto out;
}
cpu_relax();
loop_count++;
header.full = sst_shim_read64(sst_drv_ctx->shim, SST_IPCX);
}
} else {
if (list_empty(&sst_drv_ctx->ipc_dispatch_list)) {
/* queue is empty, nothing to send */
spin_unlock_irqrestore(&sst_drv_ctx->ipc_spin_lock, irq_flags);
dev_dbg(sst_drv_ctx->dev,
"Empty msg queue... NO Action\n");
return 0;
}
if (header.p.header_high.part.busy) {
spin_unlock_irqrestore(&sst_drv_ctx->ipc_spin_lock, irq_flags);
dev_dbg(sst_drv_ctx->dev, "Busy not free... post later\n");
return 0;
}
/* copy msg from list */
msg = list_entry(sst_drv_ctx->ipc_dispatch_list.next,
struct ipc_post, node);
list_del(&msg->node);
}
dev_dbg(sst_drv_ctx->dev, "sst: Post message: header = %x\n",
msg->mrfld_header.p.header_high.full);
dev_dbg(sst_drv_ctx->dev, "sst: size = 0x%x\n",
msg->mrfld_header.p.header_low_payload);
if (msg->mrfld_header.p.header_high.part.large)
memcpy_toio(sst_drv_ctx->mailbox + SST_MAILBOX_SEND,
msg->mailbox_data,
msg->mrfld_header.p.header_low_payload);
sst_shim_write64(sst_drv_ctx->shim, SST_IPCX, msg->mrfld_header.full);
out:
spin_unlock_irqrestore(&sst_drv_ctx->ipc_spin_lock, irq_flags);
kfree(msg->mailbox_data);
kfree(msg);
return retval;
}
void intel_sst_clear_intr_mrfld(struct intel_sst_drv *sst_drv_ctx)
{
union interrupt_reg_mrfld isr;
union interrupt_reg_mrfld imr;
union ipc_header_mrfld clear_ipc;
unsigned long irq_flags;
spin_lock_irqsave(&sst_drv_ctx->ipc_spin_lock, irq_flags);
imr.full = sst_shim_read64(sst_drv_ctx->shim, SST_IMRX);
isr.full = sst_shim_read64(sst_drv_ctx->shim, SST_ISRX);
/* write 1 to clear*/
isr.part.busy_interrupt = 1;
sst_shim_write64(sst_drv_ctx->shim, SST_ISRX, isr.full);
/* Set IA done bit */
clear_ipc.full = sst_shim_read64(sst_drv_ctx->shim, SST_IPCD);
clear_ipc.p.header_high.part.busy = 0;
clear_ipc.p.header_high.part.done = 1;
clear_ipc.p.header_low_payload = IPC_ACK_SUCCESS;
sst_shim_write64(sst_drv_ctx->shim, SST_IPCD, clear_ipc.full);
/* un mask busy interrupt */
imr.part.busy_interrupt = 0;
sst_shim_write64(sst_drv_ctx->shim, SST_IMRX, imr.full);
spin_unlock_irqrestore(&sst_drv_ctx->ipc_spin_lock, irq_flags);
}
/*
* process_fw_init - process the FW init msg
*
* @msg: IPC message mailbox data from FW
*
* This function processes the FW init msg from FW
* marks FW state and prints debug info of loaded FW
*/
static void process_fw_init(struct intel_sst_drv *sst_drv_ctx,
void *msg)
{
struct ipc_header_fw_init *init =
(struct ipc_header_fw_init *)msg;
int retval = 0;
dev_dbg(sst_drv_ctx->dev, "*** FW Init msg came***\n");
if (init->result) {
sst_set_fw_state_locked(sst_drv_ctx, SST_RESET);
dev_err(sst_drv_ctx->dev, "FW Init failed, Error %x\n",
init->result);
retval = init->result;
goto ret;
}
ret:
sst_wake_up_block(sst_drv_ctx, retval, FW_DWNL_ID, 0 , NULL, 0);
}
static void process_fw_async_msg(struct intel_sst_drv *sst_drv_ctx,
struct ipc_post *msg)
{
u32 msg_id;
int str_id;
u32 data_size, i;
void *data_offset;
struct stream_info *stream;
union ipc_header_high msg_high;
u32 msg_low, pipe_id;
msg_high = msg->mrfld_header.p.header_high;
msg_low = msg->mrfld_header.p.header_low_payload;
msg_id = ((struct ipc_dsp_hdr *)msg->mailbox_data)->cmd_id;
data_offset = (msg->mailbox_data + sizeof(struct ipc_dsp_hdr));
data_size = msg_low - (sizeof(struct ipc_dsp_hdr));
switch (msg_id) {
case IPC_SST_PERIOD_ELAPSED_MRFLD:
pipe_id = ((struct ipc_dsp_hdr *)msg->mailbox_data)->pipe_id;
str_id = get_stream_id_mrfld(sst_drv_ctx, pipe_id);
if (str_id > 0) {
dev_dbg(sst_drv_ctx->dev,
"Period elapsed rcvd for pipe id 0x%x\n",
pipe_id);
stream = &sst_drv_ctx->streams[str_id];
if (stream->period_elapsed)
stream->period_elapsed(stream->pcm_substream);
if (stream->compr_cb)
stream->compr_cb(stream->compr_cb_param);
}
break;
case IPC_IA_DRAIN_STREAM_MRFLD:
pipe_id = ((struct ipc_dsp_hdr *)msg->mailbox_data)->pipe_id;
str_id = get_stream_id_mrfld(sst_drv_ctx, pipe_id);
if (str_id > 0) {
stream = &sst_drv_ctx->streams[str_id];
if (stream->drain_notify)
stream->drain_notify(stream->drain_cb_param);
}
break;
case IPC_IA_FW_ASYNC_ERR_MRFLD:
dev_err(sst_drv_ctx->dev, "FW sent async error msg:\n");
for (i = 0; i < (data_size/4); i++)
print_hex_dump(KERN_DEBUG, NULL, DUMP_PREFIX_NONE,
16, 4, data_offset, data_size, false);
break;
case IPC_IA_FW_INIT_CMPLT_MRFLD:
process_fw_init(sst_drv_ctx, data_offset);
break;
case IPC_IA_BUF_UNDER_RUN_MRFLD:
pipe_id = ((struct ipc_dsp_hdr *)msg->mailbox_data)->pipe_id;
str_id = get_stream_id_mrfld(sst_drv_ctx, pipe_id);
if (str_id > 0)
dev_err(sst_drv_ctx->dev,
"Buffer under-run for pipe:%#x str_id:%d\n",
pipe_id, str_id);
break;
default:
dev_err(sst_drv_ctx->dev,
"Unrecognized async msg from FW msg_id %#x\n", msg_id);
}
}
void sst_process_reply_mrfld(struct intel_sst_drv *sst_drv_ctx,
struct ipc_post *msg)
{
unsigned int drv_id;
void *data;
union ipc_header_high msg_high;
u32 msg_low;
struct ipc_dsp_hdr *dsp_hdr;
unsigned int cmd_id;
msg_high = msg->mrfld_header.p.header_high;
msg_low = msg->mrfld_header.p.header_low_payload;
dev_dbg(sst_drv_ctx->dev, "IPC process message header %x payload %x\n",
msg->mrfld_header.p.header_high.full,
msg->mrfld_header.p.header_low_payload);
drv_id = msg_high.part.drv_id;
/* Check for async messages first */
if (drv_id == SST_ASYNC_DRV_ID) {
/*FW sent async large message*/
process_fw_async_msg(sst_drv_ctx, msg);
return;
}
/* FW sent short error response for an IPC */
if (msg_high.part.result && drv_id && !msg_high.part.large) {
/* 32-bit FW error code in msg_low */
dev_err(sst_drv_ctx->dev, "FW sent error response 0x%x", msg_low);
sst_wake_up_block(sst_drv_ctx, msg_high.part.result,
msg_high.part.drv_id,
msg_high.part.msg_id, NULL, 0);
return;
}
/*
* Process all valid responses
* if it is a large message, the payload contains the size to
* copy from mailbox
**/
if (msg_high.part.large) {
data = kzalloc(msg_low, GFP_KERNEL);
if (!data)
return;
memcpy(data, (void *) msg->mailbox_data, msg_low);
/* Copy command id so that we can use to put sst to reset */
dsp_hdr = (struct ipc_dsp_hdr *)data;
cmd_id = dsp_hdr->cmd_id;
dev_dbg(sst_drv_ctx->dev, "cmd_id %d\n", dsp_hdr->cmd_id);
if (sst_wake_up_block(sst_drv_ctx, msg_high.part.result,
msg_high.part.drv_id,
msg_high.part.msg_id, data, msg_low))
kfree(data);
} else {
sst_wake_up_block(sst_drv_ctx, msg_high.part.result,
msg_high.part.drv_id,
msg_high.part.msg_id, NULL, 0);
}
}