574 lines
15 KiB
C
574 lines
15 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* sst.c - Intel SST Driver for audio engine
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*
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* Copyright (C) 2008-14 Intel Corp
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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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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*/
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#include <linux/module.h>
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#include <linux/fs.h>
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#include <linux/interrupt.h>
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#include <linux/io.h>
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#include <linux/firmware.h>
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#include <linux/pm_runtime.h>
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#include <linux/pm_qos.h>
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#include <linux/async.h>
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#include <linux/acpi.h>
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#include <linux/sysfs.h>
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#include <sound/core.h>
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#include <sound/soc.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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MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
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MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
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MODULE_DESCRIPTION("Intel (R) SST(R) Audio Engine Driver");
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MODULE_LICENSE("GPL v2");
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static inline bool sst_is_process_reply(u32 msg_id)
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{
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return ((msg_id & PROCESS_MSG) ? true : false);
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}
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static inline bool sst_validate_mailbox_size(unsigned int size)
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{
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return ((size <= SST_MAILBOX_SIZE) ? true : false);
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}
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static irqreturn_t intel_sst_interrupt_mrfld(int irq, void *context)
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{
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union interrupt_reg_mrfld isr;
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union ipc_header_mrfld header;
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union sst_imr_reg_mrfld imr;
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struct ipc_post *msg = NULL;
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unsigned int size;
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struct intel_sst_drv *drv = (struct intel_sst_drv *) context;
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irqreturn_t retval = IRQ_HANDLED;
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/* Interrupt arrived, check src */
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isr.full = sst_shim_read64(drv->shim, SST_ISRX);
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if (isr.part.done_interrupt) {
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/* Clear done bit */
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spin_lock(&drv->ipc_spin_lock);
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header.full = sst_shim_read64(drv->shim,
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drv->ipc_reg.ipcx);
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header.p.header_high.part.done = 0;
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sst_shim_write64(drv->shim, drv->ipc_reg.ipcx, header.full);
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/* write 1 to clear status register */;
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isr.part.done_interrupt = 1;
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sst_shim_write64(drv->shim, SST_ISRX, isr.full);
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spin_unlock(&drv->ipc_spin_lock);
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/* we can send more messages to DSP so trigger work */
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queue_work(drv->post_msg_wq, &drv->ipc_post_msg_wq);
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retval = IRQ_HANDLED;
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}
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if (isr.part.busy_interrupt) {
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/* message from dsp so copy that */
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spin_lock(&drv->ipc_spin_lock);
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imr.full = sst_shim_read64(drv->shim, SST_IMRX);
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imr.part.busy_interrupt = 1;
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sst_shim_write64(drv->shim, SST_IMRX, imr.full);
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spin_unlock(&drv->ipc_spin_lock);
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header.full = sst_shim_read64(drv->shim, drv->ipc_reg.ipcd);
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if (sst_create_ipc_msg(&msg, header.p.header_high.part.large)) {
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drv->ops->clear_interrupt(drv);
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return IRQ_HANDLED;
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}
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if (header.p.header_high.part.large) {
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size = header.p.header_low_payload;
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if (sst_validate_mailbox_size(size)) {
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memcpy_fromio(msg->mailbox_data,
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drv->mailbox + drv->mailbox_recv_offset, size);
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} else {
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dev_err(drv->dev,
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"Mailbox not copied, payload size is: %u\n", size);
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header.p.header_low_payload = 0;
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}
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}
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msg->mrfld_header = header;
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msg->is_process_reply =
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sst_is_process_reply(header.p.header_high.part.msg_id);
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spin_lock(&drv->rx_msg_lock);
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list_add_tail(&msg->node, &drv->rx_list);
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spin_unlock(&drv->rx_msg_lock);
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drv->ops->clear_interrupt(drv);
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retval = IRQ_WAKE_THREAD;
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}
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return retval;
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}
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static irqreturn_t intel_sst_irq_thread_mrfld(int irq, void *context)
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{
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struct intel_sst_drv *drv = (struct intel_sst_drv *) context;
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struct ipc_post *__msg, *msg;
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unsigned long irq_flags;
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spin_lock_irqsave(&drv->rx_msg_lock, irq_flags);
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if (list_empty(&drv->rx_list)) {
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spin_unlock_irqrestore(&drv->rx_msg_lock, irq_flags);
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return IRQ_HANDLED;
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}
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list_for_each_entry_safe(msg, __msg, &drv->rx_list, node) {
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list_del(&msg->node);
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spin_unlock_irqrestore(&drv->rx_msg_lock, irq_flags);
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if (msg->is_process_reply)
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drv->ops->process_message(msg);
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else
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drv->ops->process_reply(drv, msg);
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if (msg->is_large)
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kfree(msg->mailbox_data);
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kfree(msg);
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spin_lock_irqsave(&drv->rx_msg_lock, irq_flags);
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}
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spin_unlock_irqrestore(&drv->rx_msg_lock, irq_flags);
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return IRQ_HANDLED;
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}
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static int sst_save_dsp_context_v2(struct intel_sst_drv *sst)
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{
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int ret = 0;
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ret = sst_prepare_and_post_msg(sst, SST_TASK_ID_MEDIA, IPC_CMD,
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IPC_PREP_D3, PIPE_RSVD, 0, NULL, NULL,
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true, true, false, true);
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if (ret < 0) {
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dev_err(sst->dev, "not suspending FW!!, Err: %d\n", ret);
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return -EIO;
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}
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return 0;
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}
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static struct intel_sst_ops mrfld_ops = {
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.interrupt = intel_sst_interrupt_mrfld,
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.irq_thread = intel_sst_irq_thread_mrfld,
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.clear_interrupt = intel_sst_clear_intr_mrfld,
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.start = sst_start_mrfld,
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.reset = intel_sst_reset_dsp_mrfld,
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.post_message = sst_post_message_mrfld,
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.process_reply = sst_process_reply_mrfld,
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.save_dsp_context = sst_save_dsp_context_v2,
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.alloc_stream = sst_alloc_stream_mrfld,
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.post_download = sst_post_download_mrfld,
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};
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int sst_driver_ops(struct intel_sst_drv *sst)
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{
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switch (sst->dev_id) {
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case SST_MRFLD_PCI_ID:
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case SST_BYT_ACPI_ID:
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case SST_CHV_ACPI_ID:
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sst->tstamp = SST_TIME_STAMP_MRFLD;
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sst->ops = &mrfld_ops;
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return 0;
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default:
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dev_err(sst->dev,
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"SST Driver capabilities missing for dev_id: %x",
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sst->dev_id);
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return -EINVAL;
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}
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}
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void sst_process_pending_msg(struct work_struct *work)
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{
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struct intel_sst_drv *ctx = container_of(work,
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struct intel_sst_drv, ipc_post_msg_wq);
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ctx->ops->post_message(ctx, NULL, false);
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}
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static int sst_workqueue_init(struct intel_sst_drv *ctx)
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{
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INIT_LIST_HEAD(&ctx->memcpy_list);
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INIT_LIST_HEAD(&ctx->rx_list);
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INIT_LIST_HEAD(&ctx->ipc_dispatch_list);
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INIT_LIST_HEAD(&ctx->block_list);
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INIT_WORK(&ctx->ipc_post_msg_wq, sst_process_pending_msg);
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init_waitqueue_head(&ctx->wait_queue);
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ctx->post_msg_wq =
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create_singlethread_workqueue("sst_post_msg_wq");
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if (!ctx->post_msg_wq)
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return -EBUSY;
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return 0;
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}
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static void sst_init_locks(struct intel_sst_drv *ctx)
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{
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mutex_init(&ctx->sst_lock);
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spin_lock_init(&ctx->rx_msg_lock);
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spin_lock_init(&ctx->ipc_spin_lock);
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spin_lock_init(&ctx->block_lock);
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}
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int sst_alloc_drv_context(struct intel_sst_drv **ctx,
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struct device *dev, unsigned int dev_id)
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{
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*ctx = devm_kzalloc(dev, sizeof(struct intel_sst_drv), GFP_KERNEL);
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if (!(*ctx))
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return -ENOMEM;
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(*ctx)->dev = dev;
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(*ctx)->dev_id = dev_id;
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return 0;
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}
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EXPORT_SYMBOL_GPL(sst_alloc_drv_context);
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static ssize_t firmware_version_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct intel_sst_drv *ctx = dev_get_drvdata(dev);
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if (ctx->fw_version.type == 0 && ctx->fw_version.major == 0 &&
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ctx->fw_version.minor == 0 && ctx->fw_version.build == 0)
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return sysfs_emit(buf, "FW not yet loaded\n");
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else
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return sysfs_emit(buf, "v%02x.%02x.%02x.%02x\n",
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ctx->fw_version.type, ctx->fw_version.major,
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ctx->fw_version.minor, ctx->fw_version.build);
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}
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static DEVICE_ATTR_RO(firmware_version);
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static const struct attribute *sst_fw_version_attrs[] = {
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&dev_attr_firmware_version.attr,
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NULL,
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};
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static const struct attribute_group sst_fw_version_attr_group = {
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.attrs = (struct attribute **)sst_fw_version_attrs,
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};
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int sst_context_init(struct intel_sst_drv *ctx)
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{
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int ret = 0, i;
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if (!ctx->pdata)
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return -EINVAL;
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if (!ctx->pdata->probe_data)
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return -EINVAL;
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memcpy(&ctx->info, ctx->pdata->probe_data, sizeof(ctx->info));
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ret = sst_driver_ops(ctx);
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if (ret != 0)
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return -EINVAL;
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sst_init_locks(ctx);
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sst_set_fw_state_locked(ctx, SST_RESET);
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/* pvt_id 0 reserved for async messages */
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ctx->pvt_id = 1;
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ctx->stream_cnt = 0;
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ctx->fw_in_mem = NULL;
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/* we use memcpy, so set to 0 */
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ctx->use_dma = 0;
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ctx->use_lli = 0;
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if (sst_workqueue_init(ctx))
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return -EINVAL;
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ctx->mailbox_recv_offset = ctx->pdata->ipc_info->mbox_recv_off;
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ctx->ipc_reg.ipcx = SST_IPCX + ctx->pdata->ipc_info->ipc_offset;
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ctx->ipc_reg.ipcd = SST_IPCD + ctx->pdata->ipc_info->ipc_offset;
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dev_info(ctx->dev, "Got drv data max stream %d\n",
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ctx->info.max_streams);
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for (i = 1; i <= ctx->info.max_streams; i++) {
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struct stream_info *stream = &ctx->streams[i];
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memset(stream, 0, sizeof(*stream));
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stream->pipe_id = PIPE_RSVD;
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mutex_init(&stream->lock);
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}
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/* Register the ISR */
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ret = devm_request_threaded_irq(ctx->dev, ctx->irq_num, ctx->ops->interrupt,
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ctx->ops->irq_thread, 0, SST_DRV_NAME,
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ctx);
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if (ret)
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goto do_free_mem;
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dev_dbg(ctx->dev, "Registered IRQ %#x\n", ctx->irq_num);
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/* default intr are unmasked so set this as masked */
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sst_shim_write64(ctx->shim, SST_IMRX, 0xFFFF0038);
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ctx->qos = devm_kzalloc(ctx->dev,
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sizeof(struct pm_qos_request), GFP_KERNEL);
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if (!ctx->qos) {
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ret = -ENOMEM;
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goto do_free_mem;
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}
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cpu_latency_qos_add_request(ctx->qos, PM_QOS_DEFAULT_VALUE);
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dev_dbg(ctx->dev, "Requesting FW %s now...\n", ctx->firmware_name);
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ret = request_firmware_nowait(THIS_MODULE, true, ctx->firmware_name,
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ctx->dev, GFP_KERNEL, ctx, sst_firmware_load_cb);
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if (ret) {
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dev_err(ctx->dev, "Firmware download failed:%d\n", ret);
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goto do_free_mem;
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}
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ret = sysfs_create_group(&ctx->dev->kobj,
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&sst_fw_version_attr_group);
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if (ret) {
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dev_err(ctx->dev,
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"Unable to create sysfs\n");
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goto err_sysfs;
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}
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sst_register(ctx->dev);
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return 0;
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err_sysfs:
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sysfs_remove_group(&ctx->dev->kobj, &sst_fw_version_attr_group);
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do_free_mem:
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destroy_workqueue(ctx->post_msg_wq);
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return ret;
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}
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EXPORT_SYMBOL_GPL(sst_context_init);
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void sst_context_cleanup(struct intel_sst_drv *ctx)
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{
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pm_runtime_get_noresume(ctx->dev);
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pm_runtime_disable(ctx->dev);
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sst_unregister(ctx->dev);
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sst_set_fw_state_locked(ctx, SST_SHUTDOWN);
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sysfs_remove_group(&ctx->dev->kobj, &sst_fw_version_attr_group);
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destroy_workqueue(ctx->post_msg_wq);
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cpu_latency_qos_remove_request(ctx->qos);
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kfree(ctx->fw_sg_list.src);
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kfree(ctx->fw_sg_list.dst);
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ctx->fw_sg_list.list_len = 0;
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kfree(ctx->fw_in_mem);
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ctx->fw_in_mem = NULL;
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sst_memcpy_free_resources(ctx);
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}
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EXPORT_SYMBOL_GPL(sst_context_cleanup);
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void sst_configure_runtime_pm(struct intel_sst_drv *ctx)
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{
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pm_runtime_set_autosuspend_delay(ctx->dev, SST_SUSPEND_DELAY);
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pm_runtime_use_autosuspend(ctx->dev);
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/*
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* For acpi devices, the actual physical device state is
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* initially active. So change the state to active before
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* enabling the pm
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*/
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if (!acpi_disabled)
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pm_runtime_set_active(ctx->dev);
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pm_runtime_enable(ctx->dev);
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if (acpi_disabled)
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pm_runtime_set_active(ctx->dev);
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else
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pm_runtime_put_noidle(ctx->dev);
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}
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EXPORT_SYMBOL_GPL(sst_configure_runtime_pm);
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static int intel_sst_runtime_suspend(struct device *dev)
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{
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int ret = 0;
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struct intel_sst_drv *ctx = dev_get_drvdata(dev);
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if (ctx->sst_state == SST_RESET) {
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dev_dbg(dev, "LPE is already in RESET state, No action\n");
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return 0;
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}
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/* save fw context */
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if (ctx->ops->save_dsp_context(ctx))
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return -EBUSY;
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/* Move the SST state to Reset */
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sst_set_fw_state_locked(ctx, SST_RESET);
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synchronize_irq(ctx->irq_num);
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flush_workqueue(ctx->post_msg_wq);
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ctx->ops->reset(ctx);
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return ret;
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}
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static int intel_sst_suspend(struct device *dev)
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{
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struct intel_sst_drv *ctx = dev_get_drvdata(dev);
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struct sst_fw_save *fw_save;
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int i, ret;
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/* check first if we are already in SW reset */
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if (ctx->sst_state == SST_RESET)
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return 0;
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/*
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* check if any stream is active and running
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* they should already by suspend by soc_suspend
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*/
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for (i = 1; i <= ctx->info.max_streams; i++) {
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struct stream_info *stream = &ctx->streams[i];
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if (stream->status == STREAM_RUNNING) {
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dev_err(dev, "stream %d is running, can't suspend, abort\n", i);
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return -EBUSY;
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}
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if (ctx->pdata->streams_lost_on_suspend) {
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stream->resume_status = stream->status;
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stream->resume_prev = stream->prev;
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if (stream->status != STREAM_UN_INIT)
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sst_free_stream(ctx, i);
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}
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}
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synchronize_irq(ctx->irq_num);
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flush_workqueue(ctx->post_msg_wq);
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/* Move the SST state to Reset */
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sst_set_fw_state_locked(ctx, SST_RESET);
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/* tell DSP we are suspending */
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if (ctx->ops->save_dsp_context(ctx))
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return -EBUSY;
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/* save the memories */
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fw_save = kzalloc(sizeof(*fw_save), GFP_KERNEL);
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if (!fw_save)
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return -ENOMEM;
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fw_save->iram = kvzalloc(ctx->iram_end - ctx->iram_base, GFP_KERNEL);
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if (!fw_save->iram) {
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ret = -ENOMEM;
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goto iram;
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}
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fw_save->dram = kvzalloc(ctx->dram_end - ctx->dram_base, GFP_KERNEL);
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if (!fw_save->dram) {
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ret = -ENOMEM;
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goto dram;
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}
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fw_save->sram = kvzalloc(SST_MAILBOX_SIZE, GFP_KERNEL);
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if (!fw_save->sram) {
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ret = -ENOMEM;
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goto sram;
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}
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fw_save->ddr = kvzalloc(ctx->ddr_end - ctx->ddr_base, GFP_KERNEL);
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if (!fw_save->ddr) {
|
|
ret = -ENOMEM;
|
|
goto ddr;
|
|
}
|
|
|
|
memcpy32_fromio(fw_save->iram, ctx->iram, ctx->iram_end - ctx->iram_base);
|
|
memcpy32_fromio(fw_save->dram, ctx->dram, ctx->dram_end - ctx->dram_base);
|
|
memcpy32_fromio(fw_save->sram, ctx->mailbox, SST_MAILBOX_SIZE);
|
|
memcpy32_fromio(fw_save->ddr, ctx->ddr, ctx->ddr_end - ctx->ddr_base);
|
|
|
|
ctx->fw_save = fw_save;
|
|
ctx->ops->reset(ctx);
|
|
return 0;
|
|
ddr:
|
|
kvfree(fw_save->sram);
|
|
sram:
|
|
kvfree(fw_save->dram);
|
|
dram:
|
|
kvfree(fw_save->iram);
|
|
iram:
|
|
kfree(fw_save);
|
|
return ret;
|
|
}
|
|
|
|
static int intel_sst_resume(struct device *dev)
|
|
{
|
|
struct intel_sst_drv *ctx = dev_get_drvdata(dev);
|
|
struct sst_fw_save *fw_save = ctx->fw_save;
|
|
struct sst_block *block;
|
|
int i, ret = 0;
|
|
|
|
if (!fw_save)
|
|
return 0;
|
|
|
|
sst_set_fw_state_locked(ctx, SST_FW_LOADING);
|
|
|
|
/* we have to restore the memory saved */
|
|
ctx->ops->reset(ctx);
|
|
|
|
ctx->fw_save = NULL;
|
|
|
|
memcpy32_toio(ctx->iram, fw_save->iram, ctx->iram_end - ctx->iram_base);
|
|
memcpy32_toio(ctx->dram, fw_save->dram, ctx->dram_end - ctx->dram_base);
|
|
memcpy32_toio(ctx->mailbox, fw_save->sram, SST_MAILBOX_SIZE);
|
|
memcpy32_toio(ctx->ddr, fw_save->ddr, ctx->ddr_end - ctx->ddr_base);
|
|
|
|
kvfree(fw_save->sram);
|
|
kvfree(fw_save->dram);
|
|
kvfree(fw_save->iram);
|
|
kvfree(fw_save->ddr);
|
|
kfree(fw_save);
|
|
|
|
block = sst_create_block(ctx, 0, FW_DWNL_ID);
|
|
if (block == NULL)
|
|
return -ENOMEM;
|
|
|
|
|
|
/* start and wait for ack */
|
|
ctx->ops->start(ctx);
|
|
ret = sst_wait_timeout(ctx, block);
|
|
if (ret) {
|
|
dev_err(ctx->dev, "fw download failed %d\n", ret);
|
|
/* FW download failed due to timeout */
|
|
ret = -EBUSY;
|
|
|
|
} else {
|
|
sst_set_fw_state_locked(ctx, SST_FW_RUNNING);
|
|
}
|
|
|
|
if (ctx->pdata->streams_lost_on_suspend) {
|
|
for (i = 1; i <= ctx->info.max_streams; i++) {
|
|
struct stream_info *stream = &ctx->streams[i];
|
|
|
|
if (stream->resume_status != STREAM_UN_INIT) {
|
|
dev_dbg(ctx->dev, "Re-allocing stream %d status %d prev %d\n",
|
|
i, stream->resume_status,
|
|
stream->resume_prev);
|
|
sst_realloc_stream(ctx, i);
|
|
stream->status = stream->resume_status;
|
|
stream->prev = stream->resume_prev;
|
|
}
|
|
}
|
|
}
|
|
|
|
sst_free_block(ctx, block);
|
|
return ret;
|
|
}
|
|
|
|
const struct dev_pm_ops intel_sst_pm = {
|
|
.suspend = intel_sst_suspend,
|
|
.resume = intel_sst_resume,
|
|
.runtime_suspend = intel_sst_runtime_suspend,
|
|
};
|
|
EXPORT_SYMBOL_GPL(intel_sst_pm);
|