diff options
Diffstat (limited to 'src/soc/intel/common')
| -rw-r--r-- | src/soc/intel/common/Makefile.inc | 1 | ||||
| -rw-r--r-- | src/soc/intel/common/hda_verb.c | 253 | ||||
| -rw-r--r-- | src/soc/intel/common/hda_verb.h | 39 |
3 files changed, 293 insertions, 0 deletions
diff --git a/src/soc/intel/common/Makefile.inc b/src/soc/intel/common/Makefile.inc index b32255ae42..0c39d80340 100644 --- a/src/soc/intel/common/Makefile.inc +++ b/src/soc/intel/common/Makefile.inc @@ -1,3 +1,4 @@ +ramstage-y += hda_verb.c ramstage-$(CONFIG_CACHE_MRC_SETTINGS) += nvm.c ramstage-$(CONFIG_CACHE_MRC_SETTINGS) += mrc_cache.c romstage-$(CONFIG_CACHE_MRC_SETTINGS) += mrc_cache.c diff --git a/src/soc/intel/common/hda_verb.c b/src/soc/intel/common/hda_verb.c new file mode 100644 index 0000000000..6404ee281f --- /dev/null +++ b/src/soc/intel/common/hda_verb.c @@ -0,0 +1,253 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2008 Advanced Micro Devices, Inc. + * Copyright (C) 2008-2009 coresystems GmbH + * Copyright (C) 2011 Google Inc. + * + * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <console/console.h> +#include <arch/io.h> +#include <delay.h> +#include "hda_verb.h" + +/** + * Set bits in a register and wait for status + */ +static int set_bits(u32 port, u32 mask, u32 val) +{ + u32 reg32; + int count; + + /* Write (val & mask) to port */ + val &= mask; + reg32 = read32(port); + reg32 &= ~mask; + reg32 |= val; + write32(port, reg32); + + /* Wait for readback of register to + * match what was just written to it + */ + count = 50; + do { + /* Wait 1ms based on BKDG wait time */ + mdelay(1); + reg32 = read32(port); + reg32 &= mask; + } while ((reg32 != val) && --count); + + /* Timeout occurred */ + if (!count) + return -1; + return 0; +} + +/** + * Probe for supported codecs + */ +int hda_codec_detect(u32 base) +{ + u8 reg8; + + /* Set Bit 0 to 1 to exit reset state (BAR + 0x8)[0] */ + if (set_bits(base + HDA_GCTL_REG, HDA_GCTL_CRST, HDA_GCTL_CRST) < 0) + goto no_codec; + + /* Write back the value once reset bit is set. */ + write16(base + HDA_GCAP_REG, read16(base + HDA_GCAP_REG)); + + /* Read in Codec location (BAR + 0xe)[2..0]*/ + reg8 = read8(base + HDA_STATESTS_REG); + reg8 &= 0x0f; + if (!reg8) + goto no_codec; + + return reg8; + +no_codec: + /* Codec Not found */ + /* Put HDA back in reset (BAR + 0x8) [0] */ + set_bits(base + HDA_GCTL_REG, HDA_GCTL_CRST, 0); + printk(BIOS_DEBUG, "HDA: No codec!\n"); + return 0; +} + +/** + * Wait 50usec for the codec to indicate it is ready + * no response would imply that the codec is non-operative + */ +static int hda_wait_for_ready(u32 base) +{ + /* Use a 50 usec timeout - the Linux kernel uses the + * same duration */ + + int timeout = 50; + + while(timeout--) { + u32 reg32 = read32(base + HDA_ICII_REG); + if (!(reg32 & HDA_ICII_BUSY)) + return 0; + udelay(1); + } + + return -1; +} + +/** + * Wait 50usec for the codec to indicate that it accepted + * the previous command. No response would imply that the code + * is non-operative + */ +static int hda_wait_for_valid(u32 base) +{ + u32 reg32; + + /* Send the verb to the codec */ + reg32 = read32(base + HDA_ICII_REG); + reg32 |= HDA_ICII_BUSY | HDA_ICII_VALID; + write32(base + HDA_ICII_REG, reg32); + + /* Use a 50 usec timeout - the Linux kernel uses the + * same duration */ + + int timeout = 50; + while(timeout--) { + reg32 = read32(base + HDA_ICII_REG); + if ((reg32 & (HDA_ICII_VALID | HDA_ICII_BUSY)) == + HDA_ICII_VALID) + return 0; + udelay(1); + } + + return -1; +} + +/** + * Find a specific entry within a verb table + * + * @verb_table_bytes: verb table size in bytes + * @verb_table_data: verb table data + * @viddid: vendor/device to search for + * @verb_out: pointer to entry within table + * + * Returns size of the entry within the verb table, + * Returns 0 if the entry is not found + * + * The HDA verb table is composed of dwords. A set of 4 dwords is + * grouped together to form a "jack" descriptor. + * Bits 31:28 - Codec Address + * Bits 27:20 - NID + * Bits 19:8 - Verb ID + * Bits 7:0 - Payload + * + * coreboot groups different codec verb tables into a single table + * and prefixes each with a specific header consisting of 3 + * dword entries: + * 1 - Codec Vendor/Device ID + * 2 - Subsystem ID + * 3 - Number of jacks (groups of 4 dwords) for this codec + */ +static u32 hda_find_verb(u32 verb_table_bytes, + const u32 *verb_table_data, + u32 viddid, const u32 ** verb) +{ + int idx=0; + + while (idx < (verb_table_bytes / sizeof(u32))) { + u32 verb_size = 4 * verb_table_data[idx+2]; // in u32 + if (verb_table_data[idx] != viddid) { + idx += verb_size + 3; // skip verb + header + continue; + } + *verb = &verb_table_data[idx+3]; + return verb_size; + } + + /* Not all codecs need to load another verb */ + return 0; +} + +/** + * Write a supplied verb table + */ +int hda_codec_write(u32 base, u32 size, const u32 *data) +{ + int i; + + for (i = 0; i < size; i++) { + if (hda_wait_for_ready(base) < 0) + return -1; + + write32(base + HDA_IC_REG, data[i]); + + if (hda_wait_for_valid(base) < 0) + return -1; + } + + return 0; +} + +/** + * Initialize codec, then find the verb table and write it + */ +int hda_codec_init(u32 base, int addr, int verb_size, const u32 *verb_data) +{ + const u32 *verb; + u32 reg32, size; + int rc; + + printk(BIOS_DEBUG, "HDA: Initializing codec #%d\n", addr); + + if (!verb_size || !verb_data) { + printk(BIOS_DEBUG, "HDA: No verb list!\n"); + return -1; + } + + /* 1 */ + if (hda_wait_for_ready(base) < 0) { + printk(BIOS_DEBUG, " codec not ready.\n"); + return -1; + } + + reg32 = (addr << 28) | 0x000f0000; + write32(base + HDA_IC_REG, reg32); + + if (hda_wait_for_valid(base) < 0) { + printk(BIOS_DEBUG, " codec not valid.\n"); + return -1; + } + + /* 2 */ + reg32 = read32(base + HDA_IR_REG); + printk(BIOS_DEBUG, "HDA: codec viddid: %08x\n", reg32); + + size = hda_find_verb(verb_size, verb_data, reg32, &verb); + if (!size) { + printk(BIOS_DEBUG, "HDA: No verb table entry found\n"); + return -1; + } + + /* 3 */ + rc = hda_codec_write(base, size, verb); + + if (rc < 0) + printk(BIOS_DEBUG, "HDA: verb not loaded\n"); + else + printk(BIOS_DEBUG, "HDA: verb loaded.\n"); + + return rc; +} diff --git a/src/soc/intel/common/hda_verb.h b/src/soc/intel/common/hda_verb.h new file mode 100644 index 0000000000..a9c93c6e4f --- /dev/null +++ b/src/soc/intel/common/hda_verb.h @@ -0,0 +1,39 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2014 Google Inc. + * + * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef _COMMON_HDA_VERB_H_ +#define _COMMON_HDA_VERB_H_ + +#include <stdint.h> + +#define HDA_GCAP_REG 0x00 +#define HDA_GCTL_REG 0x08 +#define HDA_GCTL_CRST (1 << 0) +#define HDA_STATESTS_REG 0x0e +#define HDA_IC_REG 0x60 +#define HDA_IR_REG 0x64 +#define HDA_ICII_REG 0x68 +#define HDA_ICII_BUSY (1 << 0) +#define HDA_ICII_VALID (1 << 1) + +int hda_codec_detect(u32 base); +int hda_codec_write(u32 base, u32 size, const u32 *data); +int hda_codec_init(u32 base, int addr, int verb_size, const u32 *verb_data); + +#endif /* _COMMON_HDA_VERB_H_ */ |