226 lines
6.1 KiB
C
226 lines
6.1 KiB
C
/*
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* skl-nhlt.c - Intel SKL Platform NHLT parsing
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*
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* Copyright (C) 2015 Intel Corp
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* Author: Sanjiv Kumar <sanjiv.kumar@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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*/
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#include <linux/pci.h>
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#include "skl.h"
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/* Unique identification for getting NHLT blobs */
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static u8 OSC_UUID[16] = {0x6E, 0x88, 0x9F, 0xA6, 0xEB, 0x6C, 0x94, 0x45,
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0xA4, 0x1F, 0x7B, 0x5D, 0xCE, 0x24, 0xC5, 0x53};
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#define DSDT_NHLT_PATH "\\_SB.PCI0.HDAS"
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struct nhlt_acpi_table *skl_nhlt_init(struct device *dev)
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{
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acpi_handle handle;
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union acpi_object *obj;
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struct nhlt_resource_desc *nhlt_ptr = NULL;
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struct nhlt_acpi_table *nhlt_table = NULL;
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if (ACPI_FAILURE(acpi_get_handle(NULL, DSDT_NHLT_PATH, &handle))) {
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dev_err(dev, "Requested NHLT device not found\n");
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return NULL;
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}
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obj = acpi_evaluate_dsm(handle, OSC_UUID, 1, 1, NULL);
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if (obj && obj->type == ACPI_TYPE_BUFFER) {
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nhlt_ptr = (struct nhlt_resource_desc *)obj->buffer.pointer;
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if (nhlt_ptr->length)
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nhlt_table = (struct nhlt_acpi_table *)
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memremap(nhlt_ptr->min_addr, nhlt_ptr->length,
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MEMREMAP_WB);
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ACPI_FREE(obj);
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return nhlt_table;
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}
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dev_err(dev, "device specific method to extract NHLT blob failed\n");
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return NULL;
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}
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void skl_nhlt_free(struct nhlt_acpi_table *nhlt)
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{
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memunmap((void *) nhlt);
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}
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static struct nhlt_specific_cfg *skl_get_specific_cfg(
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struct device *dev, struct nhlt_fmt *fmt,
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u8 no_ch, u32 rate, u16 bps, u8 linktype)
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{
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struct nhlt_specific_cfg *sp_config;
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struct wav_fmt *wfmt;
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struct nhlt_fmt_cfg *fmt_config = fmt->fmt_config;
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int i;
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dev_dbg(dev, "Format count =%d\n", fmt->fmt_count);
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for (i = 0; i < fmt->fmt_count; i++) {
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wfmt = &fmt_config->fmt_ext.fmt;
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dev_dbg(dev, "ch=%d fmt=%d s_rate=%d\n", wfmt->channels,
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wfmt->bits_per_sample, wfmt->samples_per_sec);
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if (wfmt->channels == no_ch && wfmt->bits_per_sample == bps) {
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/*
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* if link type is dmic ignore rate check as the blob is
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* generic for all rates
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*/
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sp_config = &fmt_config->config;
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if (linktype == NHLT_LINK_DMIC)
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return sp_config;
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if (wfmt->samples_per_sec == rate)
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return sp_config;
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}
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fmt_config = (struct nhlt_fmt_cfg *)(fmt_config->config.caps +
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fmt_config->config.size);
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}
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return NULL;
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}
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static void dump_config(struct device *dev, u32 instance_id, u8 linktype,
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u8 s_fmt, u8 num_channels, u32 s_rate, u8 dirn, u16 bps)
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{
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dev_dbg(dev, "Input configuration\n");
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dev_dbg(dev, "ch=%d fmt=%d s_rate=%d\n", num_channels, s_fmt, s_rate);
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dev_dbg(dev, "vbus_id=%d link_type=%d\n", instance_id, linktype);
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dev_dbg(dev, "bits_per_sample=%d\n", bps);
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}
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static bool skl_check_ep_match(struct device *dev, struct nhlt_endpoint *epnt,
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u32 instance_id, u8 link_type, u8 dirn)
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{
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dev_dbg(dev, "vbus_id=%d link_type=%d dir=%d\n",
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epnt->virtual_bus_id, epnt->linktype, epnt->direction);
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if ((epnt->virtual_bus_id == instance_id) &&
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(epnt->linktype == link_type) &&
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(epnt->direction == dirn))
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return true;
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else
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return false;
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}
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struct nhlt_specific_cfg
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*skl_get_ep_blob(struct skl *skl, u32 instance, u8 link_type,
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u8 s_fmt, u8 num_ch, u32 s_rate, u8 dirn)
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{
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struct nhlt_fmt *fmt;
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struct nhlt_endpoint *epnt;
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struct hdac_bus *bus = ebus_to_hbus(&skl->ebus);
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struct device *dev = bus->dev;
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struct nhlt_specific_cfg *sp_config;
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struct nhlt_acpi_table *nhlt = skl->nhlt;
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u16 bps = (s_fmt == 16) ? 16 : 32;
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u8 j;
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dump_config(dev, instance, link_type, s_fmt, num_ch, s_rate, dirn, bps);
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epnt = (struct nhlt_endpoint *)nhlt->desc;
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dev_dbg(dev, "endpoint count =%d\n", nhlt->endpoint_count);
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for (j = 0; j < nhlt->endpoint_count; j++) {
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if (skl_check_ep_match(dev, epnt, instance, link_type, dirn)) {
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fmt = (struct nhlt_fmt *)(epnt->config.caps +
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epnt->config.size);
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sp_config = skl_get_specific_cfg(dev, fmt, num_ch,
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s_rate, bps, link_type);
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if (sp_config)
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return sp_config;
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}
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epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
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}
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return NULL;
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}
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int skl_get_dmic_geo(struct skl *skl)
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{
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struct nhlt_acpi_table *nhlt = (struct nhlt_acpi_table *)skl->nhlt;
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struct nhlt_endpoint *epnt;
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struct nhlt_dmic_array_config *cfg;
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struct device *dev = &skl->pci->dev;
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unsigned int dmic_geo = 0;
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u8 j;
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epnt = (struct nhlt_endpoint *)nhlt->desc;
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for (j = 0; j < nhlt->endpoint_count; j++) {
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if (epnt->linktype == NHLT_LINK_DMIC) {
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cfg = (struct nhlt_dmic_array_config *)
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(epnt->config.caps);
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switch (cfg->array_type) {
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case NHLT_MIC_ARRAY_2CH_SMALL:
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case NHLT_MIC_ARRAY_2CH_BIG:
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dmic_geo |= MIC_ARRAY_2CH;
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break;
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case NHLT_MIC_ARRAY_4CH_1ST_GEOM:
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case NHLT_MIC_ARRAY_4CH_L_SHAPED:
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case NHLT_MIC_ARRAY_4CH_2ND_GEOM:
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dmic_geo |= MIC_ARRAY_4CH;
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break;
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default:
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dev_warn(dev, "undefined DMIC array_type 0x%0x\n",
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cfg->array_type);
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}
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}
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epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
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}
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return dmic_geo;
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}
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static void skl_nhlt_trim_space(struct skl *skl)
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{
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char *s = skl->tplg_name;
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int cnt;
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int i;
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cnt = 0;
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for (i = 0; s[i]; i++) {
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if (!isspace(s[i]))
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s[cnt++] = s[i];
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}
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s[cnt] = '\0';
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}
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int skl_nhlt_update_topology_bin(struct skl *skl)
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{
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struct nhlt_acpi_table *nhlt = (struct nhlt_acpi_table *)skl->nhlt;
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struct hdac_bus *bus = ebus_to_hbus(&skl->ebus);
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struct device *dev = bus->dev;
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dev_dbg(dev, "oem_id %.6s, oem_table_id %.8s oem_revision %d\n",
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nhlt->header.oem_id, nhlt->header.oem_table_id,
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nhlt->header.oem_revision);
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snprintf(skl->tplg_name, sizeof(skl->tplg_name), "%x-%.6s-%.8s-%d%s",
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skl->pci_id, nhlt->header.oem_id, nhlt->header.oem_table_id,
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nhlt->header.oem_revision, "-tplg.bin");
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skl_nhlt_trim_space(skl);
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return 0;
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}
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