452 lines
12 KiB
C
452 lines
12 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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#include "skl-i2s.h"
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#define NHLT_ACPI_HEADER_SIG "NHLT"
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/* Unique identification for getting NHLT blobs */
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static guid_t osc_guid =
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GUID_INIT(0xA69F886E, 0x6CEB, 0x4594,
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0xA4, 0x1F, 0x7B, 0x5D, 0xCE, 0x24, 0xC5, 0x53);
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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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handle = ACPI_HANDLE(dev);
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if (!handle) {
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dev_err(dev, "Didn't find ACPI_HANDLE\n");
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return NULL;
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}
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obj = acpi_evaluate_dsm(handle, &osc_guid, 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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if (nhlt_table && (strncmp(nhlt_table->header.signature,
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NHLT_ACPI_HEADER_SIG,
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strlen(NHLT_ACPI_HEADER_SIG)) != 0)) {
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memunmap(nhlt_table);
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dev_err(dev, "NHLT ACPI header signature incorrect\n");
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return NULL;
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}
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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, u8 dev_type)
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{
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dev_dbg(dev, "vbus_id=%d link_type=%d dir=%d dev_type = %d\n",
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epnt->virtual_bus_id, epnt->linktype,
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epnt->direction, epnt->device_type);
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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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/* do not check dev_type for DMIC link type */
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if (epnt->linktype == NHLT_LINK_DMIC)
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return true;
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if (epnt->device_type == dev_type)
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return true;
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}
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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,
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u8 dirn, u8 dev_type)
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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,
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dirn, dev_type)) {
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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(char *trim)
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{
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char *s = trim;
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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->tplg_name);
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return 0;
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}
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static ssize_t skl_nhlt_platform_id_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct pci_dev *pci = to_pci_dev(dev);
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struct hdac_ext_bus *ebus = pci_get_drvdata(pci);
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struct skl *skl = ebus_to_skl(ebus);
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struct nhlt_acpi_table *nhlt = (struct nhlt_acpi_table *)skl->nhlt;
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char platform_id[32];
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sprintf(platform_id, "%x-%.6s-%.8s-%d", skl->pci_id,
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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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skl_nhlt_trim_space(platform_id);
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return sprintf(buf, "%s\n", platform_id);
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}
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static DEVICE_ATTR(platform_id, 0444, skl_nhlt_platform_id_show, NULL);
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int skl_nhlt_create_sysfs(struct skl *skl)
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{
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struct device *dev = &skl->pci->dev;
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if (sysfs_create_file(&dev->kobj, &dev_attr_platform_id.attr))
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dev_warn(dev, "Error creating sysfs entry\n");
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return 0;
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}
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void skl_nhlt_remove_sysfs(struct skl *skl)
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{
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struct device *dev = &skl->pci->dev;
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sysfs_remove_file(&dev->kobj, &dev_attr_platform_id.attr);
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}
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/*
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* Queries NHLT for all the fmt configuration for a particular endpoint and
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* stores all possible rates supported in a rate table for the corresponding
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* sclk/sclkfs.
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*/
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static void skl_get_ssp_clks(struct skl *skl, struct skl_ssp_clk *ssp_clks,
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struct nhlt_fmt *fmt, u8 id)
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{
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struct skl_i2s_config_blob_ext *i2s_config_ext;
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struct skl_i2s_config_blob_legacy *i2s_config;
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struct skl_clk_parent_src *parent;
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struct skl_ssp_clk *sclk, *sclkfs;
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struct nhlt_fmt_cfg *fmt_cfg;
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struct wav_fmt_ext *wav_fmt;
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unsigned long rate = 0;
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bool present = false;
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int rate_index = 0;
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u16 channels, bps;
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u8 clk_src;
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int i, j;
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u32 fs;
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sclk = &ssp_clks[SKL_SCLK_OFS];
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sclkfs = &ssp_clks[SKL_SCLKFS_OFS];
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if (fmt->fmt_count == 0)
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return;
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for (i = 0; i < fmt->fmt_count; i++) {
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fmt_cfg = &fmt->fmt_config[i];
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wav_fmt = &fmt_cfg->fmt_ext;
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channels = wav_fmt->fmt.channels;
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bps = wav_fmt->fmt.bits_per_sample;
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fs = wav_fmt->fmt.samples_per_sec;
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/*
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* In case of TDM configuration on a ssp, there can
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* be more than one blob in which channel masks are
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* different for each usecase for a specific rate and bps.
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* But the sclk rate will be generated for the total
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* number of channels used for that endpoint.
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*
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* So for the given fs and bps, choose blob which has
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* the superset of all channels for that endpoint and
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* derive the rate.
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*/
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for (j = i; j < fmt->fmt_count; j++) {
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fmt_cfg = &fmt->fmt_config[j];
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wav_fmt = &fmt_cfg->fmt_ext;
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if ((fs == wav_fmt->fmt.samples_per_sec) &&
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(bps == wav_fmt->fmt.bits_per_sample))
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channels = max_t(u16, channels,
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wav_fmt->fmt.channels);
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}
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rate = channels * bps * fs;
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/* check if the rate is added already to the given SSP's sclk */
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for (j = 0; (j < SKL_MAX_CLK_RATES) &&
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(sclk[id].rate_cfg[j].rate != 0); j++) {
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if (sclk[id].rate_cfg[j].rate == rate) {
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present = true;
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break;
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}
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}
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/* Fill rate and parent for sclk/sclkfs */
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if (!present) {
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i2s_config_ext = (struct skl_i2s_config_blob_ext *)
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fmt->fmt_config[0].config.caps;
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/* MCLK Divider Source Select */
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if (is_legacy_blob(i2s_config_ext->hdr.sig)) {
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i2s_config = ext_to_legacy_blob(i2s_config_ext);
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clk_src = get_clk_src(i2s_config->mclk,
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SKL_MNDSS_DIV_CLK_SRC_MASK);
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} else {
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clk_src = get_clk_src(i2s_config_ext->mclk,
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SKL_MNDSS_DIV_CLK_SRC_MASK);
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}
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parent = skl_get_parent_clk(clk_src);
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/*
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* Do not copy the config data if there is no parent
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* clock available for this clock source select
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*/
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if (!parent)
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continue;
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sclk[id].rate_cfg[rate_index].rate = rate;
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sclk[id].rate_cfg[rate_index].config = fmt_cfg;
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sclkfs[id].rate_cfg[rate_index].rate = rate;
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sclkfs[id].rate_cfg[rate_index].config = fmt_cfg;
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sclk[id].parent_name = parent->name;
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sclkfs[id].parent_name = parent->name;
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rate_index++;
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}
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}
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}
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static void skl_get_mclk(struct skl *skl, struct skl_ssp_clk *mclk,
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struct nhlt_fmt *fmt, u8 id)
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{
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struct skl_i2s_config_blob_ext *i2s_config_ext;
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struct skl_i2s_config_blob_legacy *i2s_config;
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struct nhlt_specific_cfg *fmt_cfg;
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struct skl_clk_parent_src *parent;
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u32 clkdiv, div_ratio;
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u8 clk_src;
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fmt_cfg = &fmt->fmt_config[0].config;
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i2s_config_ext = (struct skl_i2s_config_blob_ext *)fmt_cfg->caps;
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/* MCLK Divider Source Select and divider */
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if (is_legacy_blob(i2s_config_ext->hdr.sig)) {
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i2s_config = ext_to_legacy_blob(i2s_config_ext);
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clk_src = get_clk_src(i2s_config->mclk,
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SKL_MCLK_DIV_CLK_SRC_MASK);
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clkdiv = i2s_config->mclk.mdivr &
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SKL_MCLK_DIV_RATIO_MASK;
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} else {
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clk_src = get_clk_src(i2s_config_ext->mclk,
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SKL_MCLK_DIV_CLK_SRC_MASK);
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clkdiv = i2s_config_ext->mclk.mdivr[0] &
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SKL_MCLK_DIV_RATIO_MASK;
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}
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/* bypass divider */
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div_ratio = 1;
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if (clkdiv != SKL_MCLK_DIV_RATIO_MASK)
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/* Divider is 2 + clkdiv */
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div_ratio = clkdiv + 2;
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/* Calculate MCLK rate from source using div value */
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parent = skl_get_parent_clk(clk_src);
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if (!parent)
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return;
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mclk[id].rate_cfg[0].rate = parent->rate/div_ratio;
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mclk[id].rate_cfg[0].config = &fmt->fmt_config[0];
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mclk[id].parent_name = parent->name;
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}
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void skl_get_clks(struct skl *skl, struct skl_ssp_clk *ssp_clks)
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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_fmt *fmt;
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int i;
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u8 id;
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epnt = (struct nhlt_endpoint *)nhlt->desc;
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for (i = 0; i < nhlt->endpoint_count; i++) {
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if (epnt->linktype == NHLT_LINK_SSP) {
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id = epnt->virtual_bus_id;
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fmt = (struct nhlt_fmt *)(epnt->config.caps
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+ epnt->config.size);
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skl_get_ssp_clks(skl, ssp_clks, fmt, id);
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skl_get_mclk(skl, ssp_clks, fmt, id);
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}
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epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
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}
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}
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