1 /* 2 * skl-nhlt.c - Intel SKL Platform NHLT parsing 3 * 4 * Copyright (C) 2015 Intel Corp 5 * Author: Sanjiv Kumar <sanjiv.kumar@intel.com> 6 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; version 2 of the License. 11 * 12 * This program is distributed in the hope that it will be useful, but 13 * WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * General Public License for more details. 16 * 17 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 18 * 19 */ 20 #include "skl.h" 21 22 /* Unique identification for getting NHLT blobs */ 23 static u8 OSC_UUID[16] = {0x6E, 0x88, 0x9F, 0xA6, 0xEB, 0x6C, 0x94, 0x45, 24 0xA4, 0x1F, 0x7B, 0x5D, 0xCE, 0x24, 0xC5, 0x53}; 25 26 #define DSDT_NHLT_PATH "\\_SB.PCI0.HDAS" 27 28 struct nhlt_acpi_table *skl_nhlt_init(struct device *dev) 29 { 30 acpi_handle handle; 31 union acpi_object *obj; 32 struct nhlt_resource_desc *nhlt_ptr = NULL; 33 struct nhlt_acpi_table *nhlt_table = NULL; 34 35 if (ACPI_FAILURE(acpi_get_handle(NULL, DSDT_NHLT_PATH, &handle))) { 36 dev_err(dev, "Requested NHLT device not found\n"); 37 return NULL; 38 } 39 40 obj = acpi_evaluate_dsm(handle, OSC_UUID, 1, 1, NULL); 41 if (obj && obj->type == ACPI_TYPE_BUFFER) { 42 nhlt_ptr = (struct nhlt_resource_desc *)obj->buffer.pointer; 43 nhlt_table = (struct nhlt_acpi_table *) 44 memremap(nhlt_ptr->min_addr, nhlt_ptr->length, 45 MEMREMAP_WB); 46 ACPI_FREE(obj); 47 return nhlt_table; 48 } 49 50 dev_err(dev, "device specific method to extract NHLT blob failed\n"); 51 return NULL; 52 } 53 54 void skl_nhlt_free(struct nhlt_acpi_table *nhlt) 55 { 56 memunmap((void *) nhlt); 57 } 58 59 static struct nhlt_specific_cfg *skl_get_specific_cfg( 60 struct device *dev, struct nhlt_fmt *fmt, 61 u8 no_ch, u32 rate, u16 bps, u8 linktype) 62 { 63 struct nhlt_specific_cfg *sp_config; 64 struct wav_fmt *wfmt; 65 struct nhlt_fmt_cfg *fmt_config = fmt->fmt_config; 66 int i; 67 68 dev_dbg(dev, "Format count =%d\n", fmt->fmt_count); 69 70 for (i = 0; i < fmt->fmt_count; i++) { 71 wfmt = &fmt_config->fmt_ext.fmt; 72 dev_dbg(dev, "ch=%d fmt=%d s_rate=%d\n", wfmt->channels, 73 wfmt->bits_per_sample, wfmt->samples_per_sec); 74 if (wfmt->channels == no_ch && wfmt->bits_per_sample == bps) { 75 /* 76 * if link type is dmic ignore rate check as the blob is 77 * generic for all rates 78 */ 79 sp_config = &fmt_config->config; 80 if (linktype == NHLT_LINK_DMIC) 81 return sp_config; 82 83 if (wfmt->samples_per_sec == rate) 84 return sp_config; 85 } 86 87 fmt_config = (struct nhlt_fmt_cfg *)(fmt_config->config.caps + 88 fmt_config->config.size); 89 } 90 91 return NULL; 92 } 93 94 static void dump_config(struct device *dev, u32 instance_id, u8 linktype, 95 u8 s_fmt, u8 num_channels, u32 s_rate, u8 dirn, u16 bps) 96 { 97 dev_dbg(dev, "Input configuration\n"); 98 dev_dbg(dev, "ch=%d fmt=%d s_rate=%d\n", num_channels, s_fmt, s_rate); 99 dev_dbg(dev, "vbus_id=%d link_type=%d\n", instance_id, linktype); 100 dev_dbg(dev, "bits_per_sample=%d\n", bps); 101 } 102 103 static bool skl_check_ep_match(struct device *dev, struct nhlt_endpoint *epnt, 104 u32 instance_id, u8 link_type, u8 dirn) 105 { 106 dev_dbg(dev, "vbus_id=%d link_type=%d dir=%d\n", 107 epnt->virtual_bus_id, epnt->linktype, epnt->direction); 108 109 if ((epnt->virtual_bus_id == instance_id) && 110 (epnt->linktype == link_type) && 111 (epnt->direction == dirn)) 112 return true; 113 else 114 return false; 115 } 116 117 struct nhlt_specific_cfg 118 *skl_get_ep_blob(struct skl *skl, u32 instance, u8 link_type, 119 u8 s_fmt, u8 num_ch, u32 s_rate, u8 dirn) 120 { 121 struct nhlt_fmt *fmt; 122 struct nhlt_endpoint *epnt; 123 struct hdac_bus *bus = ebus_to_hbus(&skl->ebus); 124 struct device *dev = bus->dev; 125 struct nhlt_specific_cfg *sp_config; 126 struct nhlt_acpi_table *nhlt = skl->nhlt; 127 u16 bps = (s_fmt == 16) ? 16 : 32; 128 u8 j; 129 130 dump_config(dev, instance, link_type, s_fmt, num_ch, s_rate, dirn, bps); 131 132 epnt = (struct nhlt_endpoint *)nhlt->desc; 133 134 dev_dbg(dev, "endpoint count =%d\n", nhlt->endpoint_count); 135 136 for (j = 0; j < nhlt->endpoint_count; j++) { 137 if (skl_check_ep_match(dev, epnt, instance, link_type, dirn)) { 138 fmt = (struct nhlt_fmt *)(epnt->config.caps + 139 epnt->config.size); 140 sp_config = skl_get_specific_cfg(dev, fmt, num_ch, 141 s_rate, bps, link_type); 142 if (sp_config) 143 return sp_config; 144 } 145 146 epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length); 147 } 148 149 return NULL; 150 } 151 152 static void skl_nhlt_trim_space(struct skl *skl) 153 { 154 char *s = skl->tplg_name; 155 int cnt; 156 int i; 157 158 cnt = 0; 159 for (i = 0; s[i]; i++) { 160 if (!isspace(s[i])) 161 s[cnt++] = s[i]; 162 } 163 164 s[cnt] = '\0'; 165 } 166 167 int skl_nhlt_update_topology_bin(struct skl *skl) 168 { 169 struct nhlt_acpi_table *nhlt = (struct nhlt_acpi_table *)skl->nhlt; 170 struct hdac_bus *bus = ebus_to_hbus(&skl->ebus); 171 struct device *dev = bus->dev; 172 173 dev_dbg(dev, "oem_id %.6s, oem_table_id %8s oem_revision %d\n", 174 nhlt->header.oem_id, nhlt->header.oem_table_id, 175 nhlt->header.oem_revision); 176 177 snprintf(skl->tplg_name, sizeof(skl->tplg_name), "%x-%.6s-%.8s-%d%s", 178 skl->pci_id, nhlt->header.oem_id, nhlt->header.oem_table_id, 179 nhlt->header.oem_revision, "-tplg.bin"); 180 181 skl_nhlt_trim_space(skl); 182 183 return 0; 184 } 185