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- /*
- * skl-nhlt.c - Intel SKL Platform NHLT parsing
- *
- * Copyright (C) 2015 Intel Corp
- * Author: Sanjiv Kumar <sanjiv.kumar@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 "skl.h"
- /* Unique identification for getting NHLT blobs */
- static u8 OSC_UUID[16] = {0x6E, 0x88, 0x9F, 0xA6, 0xEB, 0x6C, 0x94, 0x45,
- 0xA4, 0x1F, 0x7B, 0x5D, 0xCE, 0x24, 0xC5, 0x53};
- #define DSDT_NHLT_PATH "\\_SB.PCI0.HDAS"
- void *skl_nhlt_init(struct device *dev)
- {
- acpi_handle handle;
- union acpi_object *obj;
- struct nhlt_resource_desc *nhlt_ptr = NULL;
- if (ACPI_FAILURE(acpi_get_handle(NULL, DSDT_NHLT_PATH, &handle))) {
- dev_err(dev, "Requested NHLT device not found\n");
- return NULL;
- }
- obj = acpi_evaluate_dsm(handle, OSC_UUID, 1, 1, NULL);
- if (obj && obj->type == ACPI_TYPE_BUFFER) {
- nhlt_ptr = (struct nhlt_resource_desc *)obj->buffer.pointer;
- return memremap(nhlt_ptr->min_addr, nhlt_ptr->length,
- MEMREMAP_WB);
- }
- dev_err(dev, "device specific method to extract NHLT blob failed\n");
- return NULL;
- }
- void skl_nhlt_free(void *addr)
- {
- memunmap(addr);
- }
- static struct nhlt_specific_cfg *skl_get_specific_cfg(
- struct device *dev, struct nhlt_fmt *fmt,
- u8 no_ch, u32 rate, u16 bps)
- {
- struct nhlt_specific_cfg *sp_config;
- struct wav_fmt *wfmt;
- struct nhlt_fmt_cfg *fmt_config = fmt->fmt_config;
- int i;
- dev_dbg(dev, "Format count =%d\n", fmt->fmt_count);
- for (i = 0; i < fmt->fmt_count; i++) {
- wfmt = &fmt_config->fmt_ext.fmt;
- dev_dbg(dev, "ch=%d fmt=%d s_rate=%d\n", wfmt->channels,
- wfmt->bits_per_sample, wfmt->samples_per_sec);
- if (wfmt->channels == no_ch && wfmt->samples_per_sec == rate &&
- wfmt->bits_per_sample == bps) {
- sp_config = &fmt_config->config;
- return sp_config;
- }
- fmt_config = (struct nhlt_fmt_cfg *)(fmt_config->config.caps +
- fmt_config->config.size);
- }
- return NULL;
- }
- static void dump_config(struct device *dev, u32 instance_id, u8 linktype,
- u8 s_fmt, u8 num_channels, u32 s_rate, u8 dirn, u16 bps)
- {
- dev_dbg(dev, "Input configuration\n");
- dev_dbg(dev, "ch=%d fmt=%d s_rate=%d\n", num_channels, s_fmt, s_rate);
- dev_dbg(dev, "vbus_id=%d link_type=%d\n", instance_id, linktype);
- dev_dbg(dev, "bits_per_sample=%d\n", bps);
- }
- static bool skl_check_ep_match(struct device *dev, struct nhlt_endpoint *epnt,
- u32 instance_id, u8 link_type, u8 dirn)
- {
- dev_dbg(dev, "vbus_id=%d link_type=%d dir=%d\n",
- epnt->virtual_bus_id, epnt->linktype, epnt->direction);
- if ((epnt->virtual_bus_id == instance_id) &&
- (epnt->linktype == link_type) &&
- (epnt->direction == dirn))
- return true;
- else
- return false;
- }
- struct nhlt_specific_cfg
- *skl_get_ep_blob(struct skl *skl, u32 instance, u8 link_type,
- u8 s_fmt, u8 num_ch, u32 s_rate, u8 dirn)
- {
- struct nhlt_fmt *fmt;
- struct nhlt_endpoint *epnt;
- struct hdac_bus *bus = ebus_to_hbus(&skl->ebus);
- struct device *dev = bus->dev;
- struct nhlt_specific_cfg *sp_config;
- struct nhlt_acpi_table *nhlt = (struct nhlt_acpi_table *)skl->nhlt;
- u16 bps = num_ch * s_fmt;
- u8 j;
- dump_config(dev, instance, link_type, s_fmt, num_ch, s_rate, dirn, bps);
- epnt = (struct nhlt_endpoint *)nhlt->desc;
- dev_dbg(dev, "endpoint count =%d\n", nhlt->endpoint_count);
- for (j = 0; j < nhlt->endpoint_count; j++) {
- if (skl_check_ep_match(dev, epnt, instance, link_type, dirn)) {
- fmt = (struct nhlt_fmt *)(epnt->config.caps +
- epnt->config.size);
- sp_config = skl_get_specific_cfg(dev, fmt, num_ch, s_rate, bps);
- if (sp_config)
- return sp_config;
- }
- epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
- }
- return NULL;
- }
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