diff options
Diffstat (limited to 'drivers/staging/intel_sst/intel_sst_drv_interface.c')
| -rw-r--r-- | drivers/staging/intel_sst/intel_sst_drv_interface.c | 493 |
1 files changed, 493 insertions, 0 deletions
diff --git a/drivers/staging/intel_sst/intel_sst_drv_interface.c b/drivers/staging/intel_sst/intel_sst_drv_interface.c new file mode 100644 index 0000000..669e298 --- /dev/null +++ b/drivers/staging/intel_sst/intel_sst_drv_interface.c @@ -0,0 +1,493 @@ +/* + * intel_sst_interface.c - Intel SST Driver for audio engine + * + * Copyright (C) 2008-10 Intel Corp + * Authors: Vinod Koul <vinod.koul@intel.com> + * Harsha Priya <priya.harsha@intel.com> + * Dharageswari R <dharageswari.r@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. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * This driver exposes the audio engine functionalities to the ALSA + * and middleware. + * Upper layer interfaces (MAD driver, MMF) to SST driver + */ + +#include <linux/delay.h> +#include <linux/pci.h> +#include <linux/fs.h> +#include <linux/firmware.h> +#include "intel_sst.h" +#include "intel_sst_ioctl.h" +#include "intel_sst_fw_ipc.h" +#include "intel_sst_common.h" + + +/* + * sst_download_fw - download the audio firmware to DSP + * + * This function is called when the FW needs to be downloaded to SST DSP engine + */ +int sst_download_fw(void) +{ + int retval; + const struct firmware *fw_sst; + const char *name; + if (sst_drv_ctx->sst_state != SST_UN_INIT) + return -EPERM; + if (sst_drv_ctx->pci_id == SST_MRST_PCI_ID) + name = SST_FW_FILENAME_MRST; + else + name = SST_FW_FILENAME_MFLD; + pr_debug("sst: Downloading %s FW now...\n", name); + retval = request_firmware(&fw_sst, name, &sst_drv_ctx->pci->dev); + if (retval) { + pr_err("sst: request fw failed %d\n", retval); + return retval; + } + sst_drv_ctx->alloc_block[0].sst_id = FW_DWNL_ID; + sst_drv_ctx->alloc_block[0].ops_block.condition = false; + retval = sst_load_fw(fw_sst, NULL); + if (retval) + goto end_restore; + + retval = sst_wait_timeout(sst_drv_ctx, &sst_drv_ctx->alloc_block[0]); + if (retval) + pr_err("sst: fw download failed %d\n" , retval); +end_restore: + release_firmware(fw_sst); + sst_drv_ctx->alloc_block[0].sst_id = BLOCK_UNINIT; + return retval; +} + + +/* + * sst_stalled - this function checks if the lpe is in stalled state + */ +int sst_stalled(void) +{ + int retry = 1000; + int retval = -1; + + while (retry) { + if (!sst_drv_ctx->lpe_stalled) + return 0; + /*wait for time and re-check*/ + msleep(1); + + retry--; + } + pr_debug("sst: in Stalled State\n"); + return retval; +} + +void free_stream_context(unsigned int str_id) +{ + struct stream_info *stream; + + if (!sst_validate_strid(str_id)) { + /* str_id is valid, so stream is alloacted */ + stream = &sst_drv_ctx->streams[str_id]; + if (stream->ops == STREAM_OPS_PLAYBACK || + stream->ops == STREAM_OPS_PLAYBACK_DRM) { + sst_drv_ctx->pb_streams--; + if (sst_drv_ctx->pb_streams == 0) + sst_drv_ctx->scard_ops->power_down_pmic_pb(); + } else if (stream->ops == STREAM_OPS_CAPTURE) { + sst_drv_ctx->cp_streams--; + if (sst_drv_ctx->cp_streams == 0) + sst_drv_ctx->scard_ops->power_down_pmic_cp(); + } + if (sst_drv_ctx->pb_streams == 0 + && sst_drv_ctx->cp_streams == 0) + sst_drv_ctx->scard_ops->power_down_pmic(); + if (sst_free_stream(str_id)) + sst_clean_stream(&sst_drv_ctx->streams[str_id]); + } +} + +/* + * sst_get_stream_allocated - this function gets a stream allocated with + * the given params + * + * @str_param : stream params + * @lib_dnld : pointer to pointer of lib downlaod struct + * + * This creates new stream id for a stream, in case lib is to be downloaded to + * DSP, it downloads that + */ +int sst_get_stream_allocated(struct snd_sst_params *str_param, + struct snd_sst_lib_download **lib_dnld) +{ + int retval, str_id; + struct stream_info *str_info; + + retval = sst_alloc_stream((char *) &str_param->sparams, str_param->ops, + str_param->codec, str_param->device_type); + if (retval < 0) { + pr_err("sst: sst_alloc_stream failed %d\n", retval); + return retval; + } + pr_debug("sst: Stream allocated %d\n", retval); + str_id = retval; + str_info = &sst_drv_ctx->streams[str_id]; + /* Block the call for reply */ + retval = sst_wait_interruptible_timeout(sst_drv_ctx, + &str_info->ctrl_blk, SST_BLOCK_TIMEOUT); + if ((retval != 0) || (str_info->ctrl_blk.ret_code != 0)) { + pr_debug("sst: FW alloc failed retval %d, ret_code %d\n", + retval, str_info->ctrl_blk.ret_code); + str_id = -str_info->ctrl_blk.ret_code; /*return error*/ + *lib_dnld = str_info->ctrl_blk.data; + sst_clean_stream(str_info); + } else + pr_debug("sst: FW Stream allocated sucess\n"); + return str_id; /*will ret either error (in above if) or correct str id*/ +} + +/* + * sst_get_sfreq - this function returns the frequency of the stream + * + * @str_param : stream params + */ +static int sst_get_sfreq(struct snd_sst_params *str_param) +{ + switch (str_param->codec) { + case SST_CODEC_TYPE_PCM: + return 48000; /*str_param->sparams.uc.pcm_params.sfreq;*/ + case SST_CODEC_TYPE_MP3: + return str_param->sparams.uc.mp3_params.sfreq; + case SST_CODEC_TYPE_AAC: + return str_param->sparams.uc.aac_params.sfreq;; + case SST_CODEC_TYPE_WMA9: + return str_param->sparams.uc.wma_params.sfreq;; + default: + return 0; + } +} + +/* + * sst_get_stream - this function prepares for stream allocation + * + * @str_param : stream param + */ +int sst_get_stream(struct snd_sst_params *str_param) +{ + int i, retval; + struct stream_info *str_info; + struct snd_sst_lib_download *lib_dnld; + + /* stream is not allocated, we are allocating */ + retval = sst_get_stream_allocated(str_param, &lib_dnld); + if (retval == -(SST_LIB_ERR_LIB_DNLD_REQUIRED)) { + /* codec download is required */ + struct snd_sst_alloc_response *response; + + pr_debug("sst: Codec is required.... trying that\n"); + if (lib_dnld == NULL) { + pr_err("sst: lib download null!!! abort\n"); + return -EIO; + } + i = sst_get_block_stream(sst_drv_ctx); + response = sst_drv_ctx->alloc_block[i].ops_block.data; + pr_debug("sst: alloc block allocated = %d\n", i); + if (i < 0) { + kfree(lib_dnld); + return -ENOMEM; + } + retval = sst_load_library(lib_dnld, str_param->ops); + kfree(lib_dnld); + + sst_drv_ctx->alloc_block[i].sst_id = BLOCK_UNINIT; + if (!retval) { + pr_debug("sst: codec was downloaded sucesfully\n"); + + retval = sst_get_stream_allocated(str_param, &lib_dnld); + if (retval <= 0) + goto err; + + pr_debug("sst: Alloc done stream id %d\n", retval); + } else { + pr_debug("sst: codec download failed\n"); + retval = -EIO; + goto err; + } + } else if (retval <= 0) + goto err; + /*else + set_port_params(str_param, str_param->ops);*/ + + /* store sampling freq */ + str_info = &sst_drv_ctx->streams[retval]; + str_info->sfreq = sst_get_sfreq(str_param); + + /* power on the analog, if reqd */ + if (str_param->ops == STREAM_OPS_PLAYBACK || + str_param->ops == STREAM_OPS_PLAYBACK_DRM) { + if (sst_drv_ctx->pci_id == SST_MRST_PCI_ID) + sst_drv_ctx->scard_ops->power_up_pmic_pb( + sst_drv_ctx->pmic_port_instance); + else + sst_drv_ctx->scard_ops->power_up_pmic_pb( + str_info->device); + /*Only if the playback is MP3 - Send a message*/ + sst_drv_ctx->pb_streams++; + } else if (str_param->ops == STREAM_OPS_CAPTURE) { + + sst_drv_ctx->scard_ops->power_up_pmic_cp( + sst_drv_ctx->pmic_port_instance); + /*Send a messageif not sent already*/ + sst_drv_ctx->cp_streams++; + } + +err: + return retval; +} + +void sst_process_mad_ops(struct work_struct *work) +{ + + struct mad_ops_wq *mad_ops = + container_of(work, struct mad_ops_wq, wq); + int retval = 0; + + switch (mad_ops->control_op) { + case SST_SND_PAUSE: + retval = sst_pause_stream(mad_ops->stream_id); + break; + case SST_SND_RESUME: + retval = sst_resume_stream(mad_ops->stream_id); + break; + case SST_SND_DROP: +/* retval = sst_drop_stream(mad_ops->stream_id); +*/ break; + case SST_SND_START: + pr_debug("SST Debug: start stream\n"); + retval = sst_start_stream(mad_ops->stream_id); + break; + case SST_SND_STREAM_PROCESS: + pr_debug("sst: play/capt frames...\n"); + break; + default: + pr_err("sst: wrong control_ops reported\n"); + } + return; +} +/* + * sst_control_set - Set Control params + * + * @control_list: list of controls to be set + * + * This function is called by MID sound card driver to set + * SST/Sound card controls. This is registered with MID driver + */ +int sst_control_set(int control_element, void *value) +{ + int retval = 0, str_id = 0; + struct stream_info *stream; + + if (sst_drv_ctx->sst_state == SST_SUSPENDED) { + /*LPE is suspended, resume it before proceding*/ + pr_debug("sst: Resuming from Suspended state\n"); + retval = intel_sst_resume(sst_drv_ctx->pci); + if (retval) { + pr_err("sst: Resume Failed = %#x, abort\n", retval); + return retval; + } + } + if (sst_drv_ctx->sst_state == SST_UN_INIT) { + /* FW is not downloaded */ + pr_debug("sst: DSP Downloading FW now...\n"); + retval = sst_download_fw(); + if (retval) { + pr_err("sst: FW download fail %x, abort\n", retval); + return retval; + } + if (sst_drv_ctx->pci_id == SST_MRST_PCI_ID && + sst_drv_ctx->rx_time_slot_status != RX_TIMESLOT_UNINIT + && sst_drv_ctx->pmic_vendor != SND_NC) + sst_enable_rx_timeslot( + sst_drv_ctx->rx_time_slot_status); + } + + switch (control_element) { + case SST_SND_ALLOC: { + struct snd_sst_params *str_param; + struct stream_info *str_info; + + str_param = (struct snd_sst_params *)value; + BUG_ON(!str_param); + retval = sst_get_stream(str_param); + if (retval >= 0) + sst_drv_ctx->stream_cnt++; + str_info = &sst_drv_ctx->streams[retval]; + str_info->src = MAD_DRV; + break; + } + + case SST_SND_PAUSE: + case SST_SND_RESUME: + case SST_SND_DROP: + case SST_SND_START: + sst_drv_ctx->mad_ops.control_op = control_element; + sst_drv_ctx->mad_ops.stream_id = *(int *)value; + queue_work(sst_drv_ctx->mad_wq, &sst_drv_ctx->mad_ops.wq); + break; + + case SST_SND_FREE: + str_id = *(int *)value; + stream = &sst_drv_ctx->streams[str_id]; + free_stream_context(str_id); + stream->pcm_substream = NULL; + stream->status = STREAM_UN_INIT; + stream->period_elapsed = NULL; + sst_drv_ctx->stream_cnt--; + break; + + case SST_SND_STREAM_INIT: { + struct pcm_stream_info *str_info; + struct stream_info *stream; + + pr_debug("sst: stream init called\n"); + str_info = (struct pcm_stream_info *)value; + str_id = str_info->str_id; + retval = sst_validate_strid(str_id); + if (retval) + break; + + stream = &sst_drv_ctx->streams[str_id]; + pr_debug("sst: setting the period ptrs\n"); + stream->pcm_substream = str_info->mad_substream; + stream->period_elapsed = str_info->period_elapsed; + stream->sfreq = str_info->sfreq; + stream->prev = stream->status; + stream->status = STREAM_INIT; + break; + } + + case SST_SND_BUFFER_POINTER: { + struct pcm_stream_info *stream_info; + struct snd_sst_tstamp fw_tstamp = {0,}; + struct stream_info *stream; + + + stream_info = (struct pcm_stream_info *)value; + str_id = stream_info->str_id; + retval = sst_validate_strid(str_id); + if (retval) + break; + stream = &sst_drv_ctx->streams[str_id]; + + if (!stream->pcm_substream) + break; + memcpy_fromio(&fw_tstamp, + ((void *)(sst_drv_ctx->mailbox + SST_TIME_STAMP) + +(str_id * sizeof(fw_tstamp))), + sizeof(fw_tstamp)); + + pr_debug("sst: Pointer Query on strid = %d ops %d\n", + str_id, stream->ops); + + if (stream->ops == STREAM_OPS_PLAYBACK) + stream_info->buffer_ptr = fw_tstamp.samples_rendered; + else + stream_info->buffer_ptr = fw_tstamp.samples_processed; + pr_debug("sst: Samples rendered = %llu, buffer ptr %llu\n", + fw_tstamp.samples_rendered, stream_info->buffer_ptr); + break; + } + case SST_ENABLE_RX_TIME_SLOT: { + int status = *(int *)value; + sst_drv_ctx->rx_time_slot_status = status ; + sst_enable_rx_timeslot(status); + break; + } + default: + /* Illegal case */ + pr_warn("sst: illegal req\n"); + return -EINVAL; + } + + return retval; +} + + +struct intel_sst_card_ops sst_pmic_ops = { + .control_set = sst_control_set, +}; + +/* + * register_sst_card - function for sound card to register + * + * @card: pointer to structure of operations + * + * This function is called card driver loads and is ready for registration + */ +int register_sst_card(struct intel_sst_card_ops *card) +{ + if (!sst_drv_ctx) { + pr_err("sst: No SST driver register card reject\n"); + return -ENODEV; + } + + if (!card || !card->module_name) { + pr_err("sst: Null Pointer Passed\n"); + return -EINVAL; + } + if (sst_drv_ctx->pmic_state == SND_MAD_UN_INIT) { + /* register this driver */ + if ((strncmp(SST_CARD_NAMES, card->module_name, + strlen(SST_CARD_NAMES))) == 0) { + sst_drv_ctx->pmic_vendor = card->vendor_id; + sst_drv_ctx->scard_ops = card->scard_ops; + sst_pmic_ops.module_name = card->module_name; + sst_drv_ctx->pmic_state = SND_MAD_INIT_DONE; + sst_drv_ctx->rx_time_slot_status = 0; /*default AMIC*/ + card->control_set = sst_pmic_ops.control_set; + sst_drv_ctx->scard_ops->card_status = SND_CARD_UN_INIT; + return 0; + } else { + pr_err("sst: strcmp fail %s\n", card->module_name); + return -EINVAL; + } + + } else { + /* already registered a driver */ + pr_err("sst: Repeat for registeration..denied\n"); + return -EBADRQC; + } + return 0; +} +EXPORT_SYMBOL_GPL(register_sst_card); + +/* + * unregister_sst_card- function for sound card to un-register + * + * @card: pointer to structure of operations + * + * This function is called when card driver unloads + */ +void unregister_sst_card(struct intel_sst_card_ops *card) +{ + if (sst_pmic_ops.control_set == card->control_set) { + /* unreg */ + sst_pmic_ops.module_name = ""; + sst_drv_ctx->pmic_state = SND_MAD_UN_INIT; + pr_debug("sst: Unregistered %s\n", card->module_name); + } + return; +} +EXPORT_SYMBOL_GPL(unregister_sst_card); |
