ASoC: Intel: sst: Add IPC handling
This patch adds APIs to post IPCs and process reply messages. Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Vinod Koul
Mark Brown
parent
cc547054d3
commit
ea12aa4acd
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@ -0,0 +1,358 @@
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/*
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* sst_ipc.c - Intel SST Driver for audio engine
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*
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* Copyright (C) 2008-14 Intel Corporation
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* Authors: Vinod Koul <vinod.koul@intel.com>
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* Harsha Priya <priya.harsha@intel.com>
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* Dharageswari R <dharageswari.r@intel.com>
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* KP Jeeja <jeeja.kp@intel.com>
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*/
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#include <linux/pci.h>
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#include <linux/firmware.h>
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#include <linux/sched.h>
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#include <linux/delay.h>
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#include <linux/pm_runtime.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/soc.h>
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#include <sound/compress_driver.h>
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#include <asm/intel-mid.h>
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#include <asm/platform_sst_audio.h>
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#include "../sst-mfld-platform.h"
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#include "sst.h"
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#include "../sst-dsp.h"
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struct sst_block *sst_create_block(struct intel_sst_drv *ctx,
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u32 msg_id, u32 drv_id)
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{
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struct sst_block *msg = NULL;
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dev_dbg(ctx->dev, "Enter\n");
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msg = kzalloc(sizeof(*msg), GFP_KERNEL);
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if (!msg)
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return NULL;
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msg->condition = false;
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msg->on = true;
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msg->msg_id = msg_id;
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msg->drv_id = drv_id;
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spin_lock_bh(&ctx->block_lock);
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list_add_tail(&msg->node, &ctx->block_list);
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spin_unlock_bh(&ctx->block_lock);
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return msg;
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}
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int sst_wake_up_block(struct intel_sst_drv *ctx, int result,
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u32 drv_id, u32 ipc, void *data, u32 size)
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{
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struct sst_block *block = NULL;
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dev_dbg(ctx->dev, "Enter\n");
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spin_lock_bh(&ctx->block_lock);
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list_for_each_entry(block, &ctx->block_list, node) {
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dev_dbg(ctx->dev, "Block ipc %d, drv_id %d\n", block->msg_id,
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block->drv_id);
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if (block->msg_id == ipc && block->drv_id == drv_id) {
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dev_dbg(ctx->dev, "free up the block\n");
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block->ret_code = result;
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block->data = data;
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block->size = size;
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block->condition = true;
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spin_unlock_bh(&ctx->block_lock);
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wake_up(&ctx->wait_queue);
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return 0;
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}
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}
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spin_unlock_bh(&ctx->block_lock);
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dev_dbg(ctx->dev,
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"Block not found or a response received for a short msg for ipc %d, drv_id %d\n",
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ipc, drv_id);
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return -EINVAL;
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}
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int sst_free_block(struct intel_sst_drv *ctx, struct sst_block *freed)
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{
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struct sst_block *block = NULL, *__block;
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dev_dbg(ctx->dev, "Enter\n");
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spin_lock_bh(&ctx->block_lock);
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list_for_each_entry_safe(block, __block, &ctx->block_list, node) {
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if (block == freed) {
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pr_debug("pvt_id freed --> %d\n", freed->drv_id);
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/* toggle the index position of pvt_id */
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list_del(&freed->node);
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spin_unlock_bh(&ctx->block_lock);
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kfree(freed->data);
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freed->data = NULL;
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kfree(freed);
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return 0;
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}
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}
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spin_unlock_bh(&ctx->block_lock);
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dev_err(ctx->dev, "block is already freed!!!\n");
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return -EINVAL;
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}
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int sst_post_message_mrfld(struct intel_sst_drv *sst_drv_ctx,
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struct ipc_post *ipc_msg, bool sync)
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{
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struct ipc_post *msg = ipc_msg;
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union ipc_header_mrfld header;
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unsigned int loop_count = 0;
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int retval = 0;
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unsigned long irq_flags;
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dev_dbg(sst_drv_ctx->dev, "Enter: sync: %d\n", sync);
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spin_lock_irqsave(&sst_drv_ctx->ipc_spin_lock, irq_flags);
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header.full = sst_shim_read64(sst_drv_ctx->shim, SST_IPCX);
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if (sync) {
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while (header.p.header_high.part.busy) {
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if (loop_count > 25) {
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dev_err(sst_drv_ctx->dev,
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"sst: Busy wait failed, cant send this msg\n");
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retval = -EBUSY;
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goto out;
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}
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cpu_relax();
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loop_count++;
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header.full = sst_shim_read64(sst_drv_ctx->shim, SST_IPCX);
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}
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} else {
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if (list_empty(&sst_drv_ctx->ipc_dispatch_list)) {
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/* queue is empty, nothing to send */
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spin_unlock_irqrestore(&sst_drv_ctx->ipc_spin_lock, irq_flags);
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dev_dbg(sst_drv_ctx->dev,
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"Empty msg queue... NO Action\n");
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return 0;
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}
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if (header.p.header_high.part.busy) {
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spin_unlock_irqrestore(&sst_drv_ctx->ipc_spin_lock, irq_flags);
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dev_dbg(sst_drv_ctx->dev, "Busy not free... post later\n");
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return 0;
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}
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/* copy msg from list */
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msg = list_entry(sst_drv_ctx->ipc_dispatch_list.next,
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struct ipc_post, node);
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list_del(&msg->node);
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}
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dev_dbg(sst_drv_ctx->dev, "sst: Post message: header = %x\n",
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msg->mrfld_header.p.header_high.full);
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dev_dbg(sst_drv_ctx->dev, "sst: size = 0x%x\n",
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msg->mrfld_header.p.header_low_payload);
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if (msg->mrfld_header.p.header_high.part.large)
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memcpy_toio(sst_drv_ctx->mailbox + SST_MAILBOX_SEND,
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msg->mailbox_data,
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msg->mrfld_header.p.header_low_payload);
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sst_shim_write64(sst_drv_ctx->shim, SST_IPCX, msg->mrfld_header.full);
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out:
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spin_unlock_irqrestore(&sst_drv_ctx->ipc_spin_lock, irq_flags);
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kfree(msg->mailbox_data);
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kfree(msg);
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return retval;
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}
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void intel_sst_clear_intr_mrfld(struct intel_sst_drv *sst_drv_ctx)
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{
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union interrupt_reg_mrfld isr;
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union interrupt_reg_mrfld imr;
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union ipc_header_mrfld clear_ipc;
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unsigned long irq_flags;
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spin_lock_irqsave(&sst_drv_ctx->ipc_spin_lock, irq_flags);
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imr.full = sst_shim_read64(sst_drv_ctx->shim, SST_IMRX);
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isr.full = sst_shim_read64(sst_drv_ctx->shim, SST_ISRX);
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/* write 1 to clear*/
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isr.part.busy_interrupt = 1;
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sst_shim_write64(sst_drv_ctx->shim, SST_ISRX, isr.full);
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/* Set IA done bit */
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clear_ipc.full = sst_shim_read64(sst_drv_ctx->shim, SST_IPCD);
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clear_ipc.p.header_high.part.busy = 0;
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clear_ipc.p.header_high.part.done = 1;
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clear_ipc.p.header_low_payload = IPC_ACK_SUCCESS;
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sst_shim_write64(sst_drv_ctx->shim, SST_IPCD, clear_ipc.full);
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/* un mask busy interrupt */
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imr.part.busy_interrupt = 0;
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sst_shim_write64(sst_drv_ctx->shim, SST_IMRX, imr.full);
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spin_unlock_irqrestore(&sst_drv_ctx->ipc_spin_lock, irq_flags);
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}
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/*
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* process_fw_init - process the FW init msg
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*
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* @msg: IPC message mailbox data from FW
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*
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* This function processes the FW init msg from FW
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* marks FW state and prints debug info of loaded FW
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*/
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static void process_fw_init(struct intel_sst_drv *sst_drv_ctx,
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void *msg)
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{
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struct ipc_header_fw_init *init =
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(struct ipc_header_fw_init *)msg;
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int retval = 0;
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dev_dbg(sst_drv_ctx->dev, "*** FW Init msg came***\n");
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if (init->result) {
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sst_drv_ctx->sst_state = SST_RESET;
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dev_err(sst_drv_ctx->dev, "FW Init failed, Error %x\n",
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init->result);
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retval = init->result;
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goto ret;
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}
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ret:
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sst_wake_up_block(sst_drv_ctx, retval, FW_DWNL_ID, 0 , NULL, 0);
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}
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static void process_fw_async_msg(struct intel_sst_drv *sst_drv_ctx,
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struct ipc_post *msg)
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{
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u32 msg_id;
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int str_id;
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u32 data_size, i;
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void *data_offset;
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struct stream_info *stream;
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union ipc_header_high msg_high;
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u32 msg_low, pipe_id;
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msg_high = msg->mrfld_header.p.header_high;
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msg_low = msg->mrfld_header.p.header_low_payload;
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msg_id = ((struct ipc_dsp_hdr *)msg->mailbox_data)->cmd_id;
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data_offset = (msg->mailbox_data + sizeof(struct ipc_dsp_hdr));
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data_size = msg_low - (sizeof(struct ipc_dsp_hdr));
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switch (msg_id) {
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case IPC_SST_PERIOD_ELAPSED_MRFLD:
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pipe_id = ((struct ipc_dsp_hdr *)msg->mailbox_data)->pipe_id;
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str_id = get_stream_id_mrfld(sst_drv_ctx, pipe_id);
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if (str_id > 0) {
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dev_dbg(sst_drv_ctx->dev,
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"Period elapsed rcvd for pipe id 0x%x\n",
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pipe_id);
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stream = &sst_drv_ctx->streams[str_id];
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if (stream->period_elapsed)
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stream->period_elapsed(stream->pcm_substream);
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if (stream->compr_cb)
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stream->compr_cb(stream->compr_cb_param);
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}
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break;
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case IPC_IA_DRAIN_STREAM_MRFLD:
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pipe_id = ((struct ipc_dsp_hdr *)msg->mailbox_data)->pipe_id;
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str_id = get_stream_id_mrfld(sst_drv_ctx, pipe_id);
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if (str_id > 0) {
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stream = &sst_drv_ctx->streams[str_id];
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if (stream->drain_notify)
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stream->drain_notify(stream->drain_cb_param);
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}
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break;
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case IPC_IA_FW_ASYNC_ERR_MRFLD:
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dev_err(sst_drv_ctx->dev, "FW sent async error msg:\n");
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for (i = 0; i < (data_size/4); i++)
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print_hex_dump(KERN_DEBUG, NULL, DUMP_PREFIX_NONE,
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16, 4, data_offset, data_size, false);
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break;
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case IPC_IA_FW_INIT_CMPLT_MRFLD:
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process_fw_init(sst_drv_ctx, data_offset);
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break;
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case IPC_IA_BUF_UNDER_RUN_MRFLD:
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pipe_id = ((struct ipc_dsp_hdr *)msg->mailbox_data)->pipe_id;
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str_id = get_stream_id_mrfld(sst_drv_ctx, pipe_id);
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if (str_id > 0)
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dev_err(sst_drv_ctx->dev,
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"Buffer under-run for pipe:%#x str_id:%d\n",
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pipe_id, str_id);
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break;
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default:
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dev_err(sst_drv_ctx->dev,
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"Unrecognized async msg from FW msg_id %#x\n", msg_id);
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}
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}
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void sst_process_reply_mrfld(struct intel_sst_drv *sst_drv_ctx,
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struct ipc_post *msg)
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{
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unsigned int drv_id;
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void *data;
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union ipc_header_high msg_high;
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u32 msg_low;
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struct ipc_dsp_hdr *dsp_hdr;
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unsigned int cmd_id;
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msg_high = msg->mrfld_header.p.header_high;
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msg_low = msg->mrfld_header.p.header_low_payload;
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dev_dbg(sst_drv_ctx->dev, "IPC process message header %x payload %x\n",
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msg->mrfld_header.p.header_high.full,
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msg->mrfld_header.p.header_low_payload);
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drv_id = msg_high.part.drv_id;
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/* Check for async messages first */
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if (drv_id == SST_ASYNC_DRV_ID) {
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/*FW sent async large message*/
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process_fw_async_msg(sst_drv_ctx, msg);
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return;
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}
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/* FW sent short error response for an IPC */
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if (msg_high.part.result && drv_id && !msg_high.part.large) {
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/* 32-bit FW error code in msg_low */
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dev_err(sst_drv_ctx->dev, "FW sent error response 0x%x", msg_low);
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sst_wake_up_block(sst_drv_ctx, msg_high.part.result,
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msg_high.part.drv_id,
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msg_high.part.msg_id, NULL, 0);
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return;
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}
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/*
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* Process all valid responses
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* if it is a large message, the payload contains the size to
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* copy from mailbox
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**/
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if (msg_high.part.large) {
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data = kzalloc(msg_low, GFP_KERNEL);
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if (!data)
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return;
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memcpy(data, (void *) msg->mailbox_data, msg_low);
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/* Copy command id so that we can use to put sst to reset */
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dsp_hdr = (struct ipc_dsp_hdr *)data;
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cmd_id = dsp_hdr->cmd_id;
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dev_dbg(sst_drv_ctx->dev, "cmd_id %d\n", dsp_hdr->cmd_id);
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if (sst_wake_up_block(sst_drv_ctx, msg_high.part.result,
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msg_high.part.drv_id,
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msg_high.part.msg_id, data, msg_low))
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kfree(data);
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} else {
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sst_wake_up_block(sst_drv_ctx, msg_high.part.result,
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msg_high.part.drv_id,
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msg_high.part.msg_id, NULL, 0);
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}
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}
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