This patch adds helper functions like wait, creating ipc headers, shim wrappers.
Signed-off-by: Subhransu S. Prusty subhransu.s.prusty@intel.com Signed-off-by: Vinod Koul vinod.koul@intel.com --- sound/soc/intel/sst/sst_pvt.c | 207 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 207 insertions(+) create mode 100644 sound/soc/intel/sst/sst_pvt.c
diff --git a/sound/soc/intel/sst/sst_pvt.c b/sound/soc/intel/sst/sst_pvt.c new file mode 100644 index 000000000000..b7a138e82dfe --- /dev/null +++ b/sound/soc/intel/sst/sst_pvt.c @@ -0,0 +1,207 @@ +/* + * sst_pvt.c - Intel SST Driver for audio engine + * + * Copyright (C) 2008-14 Intel Corp + * 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. + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * + * This file contains all private functions + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/kobject.h> +#include <linux/pci.h> +#include <linux/fs.h> +#include <linux/firmware.h> +#include <linux/pm_runtime.h> +#include <linux/sched.h> +#include <linux/delay.h> +#include <sound/asound.h> +#include <sound/core.h> +#include <sound/pcm.h> +#include <sound/soc.h> +#include <sound/compress_driver.h> +#include <asm/platform_sst_audio.h> +#include "../sst-mfld-platform.h" +#include "sst.h" +#include "../sst-dsp.h" + +/* + * sst_wait_interruptible - wait on event + * + * @sst_drv_ctx: Driver context + * @block: Driver block to wait on + * + * This function waits without a timeout (and is interruptable) for a + * given block event + */ +int sst_wait_interruptible(struct intel_sst_drv *sst_drv_ctx, + struct sst_block *block) +{ + int retval = 0; + + if (!wait_event_interruptible(sst_drv_ctx->wait_queue, + block->condition)) { + /* event wake */ + if (block->ret_code < 0) { + pr_err("stream failed %d\n", block->ret_code); + retval = -EBUSY; + } else { + pr_debug("event up\n"); + retval = 0; + } + } else { + pr_err("signal interrupted\n"); + retval = -EINTR; + } + return retval; + +} + +unsigned long long read_shim_data(struct intel_sst_drv *sst, int addr) +{ + unsigned long long val = 0; + + switch (sst->pci_id) { + case SST_MRFLD_PCI_ID: + val = sst_shim_read64(sst->shim, addr); + break; + } + return val; +} + +void write_shim_data(struct intel_sst_drv *sst, int addr, + unsigned long long data) +{ + switch (sst->pci_id) { + case SST_MRFLD_PCI_ID: + sst_shim_write64(sst->shim, addr, (u64) data); + break; + } +} + +/* + * sst_wait_timeout - wait on event for timeout + * + * @sst_drv_ctx: Driver context + * @block: Driver block to wait on + * + * This function waits with a timeout value (and is not interruptible) on a + * given block event + */ +int sst_wait_timeout(struct intel_sst_drv *sst_drv_ctx, struct sst_block *block) +{ + int retval = 0; + + /* NOTE: + Observed that FW processes the alloc msg and replies even + before the alloc thread has finished execution */ + pr_debug("sst: waiting for condition %x ipc %d drv_id %d\n", + block->condition, block->msg_id, block->drv_id); + if (wait_event_timeout(sst_drv_ctx->wait_queue, + block->condition, + msecs_to_jiffies(SST_BLOCK_TIMEOUT))) { + /* event wake */ + pr_debug("sst: Event wake %x\n", block->condition); + pr_debug("sst: message ret: %d\n", block->ret_code); + retval = -block->ret_code; + } else { + block->on = false; + pr_err("sst: Wait timed-out condition:%#x, msg_id:%#x fw_state %#x\n", + block->condition, block->msg_id, + sst_drv_ctx->sst_state); + sst_drv_ctx->sst_state = SST_RESET; + + retval = -EBUSY; + } + return retval; +} + +/* + * sst_create_ipc_msg - create a IPC message + * + * @arg: ipc message + * @large: large or short message + * + * this function allocates structures to send a large or short + * message to the firmware + */ +int sst_create_ipc_msg(struct ipc_post **arg, bool large) +{ + struct ipc_post *msg; + + msg = kzalloc(sizeof(struct ipc_post), GFP_ATOMIC); + if (!msg) + return -ENOMEM; + if (large) { + msg->mailbox_data = kzalloc(SST_MAILBOX_SIZE, GFP_ATOMIC); + if (!msg->mailbox_data) { + kfree(msg); + return -ENOMEM; + } + } else { + msg->mailbox_data = NULL; + } + msg->is_large = large; + *arg = msg; + return 0; +} + +/* + * sst_create_block_and_ipc_msg - Creates IPC message and sst block + * @arg: passed to sst_create_ipc_message API + * @large: large or short message + * @sst_drv_ctx: sst driver context + * @block: return block allocated + * @msg_id: IPC + * @drv_id: stream id or private id + */ +int sst_create_block_and_ipc_msg(struct ipc_post **arg, bool large, + struct intel_sst_drv *sst_drv_ctx, struct sst_block **block, + u32 msg_id, u32 drv_id) +{ + int retval = 0; + + retval = sst_create_ipc_msg(arg, large); + if (retval) + return retval; + *block = sst_create_block(sst_drv_ctx, msg_id, drv_id); + if (*block == NULL) { + kfree(*arg); + return -ENOMEM; + } + return retval; +} + +/* + * sst_clean_stream - clean the stream context + * + * @stream: stream structure + * + * this function resets the stream contexts + * should be called in free + */ +void sst_clean_stream(struct stream_info *stream) +{ + stream->status = STREAM_UN_INIT; + stream->prev = STREAM_UN_INIT; + mutex_lock(&stream->lock); + stream->cumm_bytes = 0; + mutex_unlock(&stream->lock); +} +