Add a generic Intel HD audio (Azalia) module azalia_device.c
This module uses cim_verb_data to detect and initialize HD audio codecs. The module source code is based on southbridge/intel/sch/audio.c and southbridge/nvidia/mcp55/azalia.c. Change-Id: I810fef6fdcf55d66f62da58c3d7d99f006559d6e Signed-off-by: Andrew Wu <arw@dmp.com.tw> Reviewed-on: http://review.coreboot.org/3844 Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Tested-by: build bot (Jenkins) Reviewed-by: Anton Kochkov <anton.kochkov@gmail.com>
This commit is contained in:
Andrew Wu
Anton Kochkov
parent
9361daf7fd
commit
b7bb70d3de
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@ -226,6 +226,11 @@ config CARDBUS_PLUGIN_SUPPORT
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depends on PCI
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default y
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config AZALIA_PLUGIN_SUPPORT
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bool
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depends on PCI
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default n
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config PCIEXP_COMMON_CLOCK
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prompt "Enable PCIe Common Clock"
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bool
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@ -8,6 +8,7 @@ ramstage-$(CONFIG_PCIX_PLUGIN_SUPPORT) += pcix_device.c
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ramstage-$(CONFIG_PCIEXP_PLUGIN_SUPPORT) += pciexp_device.c
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ramstage-$(CONFIG_AGP_PLUGIN_SUPPORT) += agp_device.c
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ramstage-$(CONFIG_CARDBUS_PLUGIN_SUPPORT) += cardbus_device.c
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ramstage-$(CONFIG_AZALIA_PLUGIN_SUPPORT) += azalia_device.c
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ramstage-$(CONFIG_ARCH_X86) += pnp_device.c
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ramstage-$(CONFIG_PCI) += pci_ops.c
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ramstage-y += smbus_ops.c
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@ -0,0 +1,276 @@
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/*
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* This file is part of the coreboot project.
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*
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* Copyright (C) 2013 DMP Electronics Inc.
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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,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <console/console.h>
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#include <device/device.h>
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#include <device/pci.h>
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#include <device/pci_ids.h>
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#include <device/pci_ops.h>
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#include <device/azalia_device.h>
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#include <arch/io.h>
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#include <delay.h>
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#define HDA_ICII_REG 0x68
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#define HDA_ICII_BUSY (1 << 0)
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#define HDA_ICII_VALID (1 << 1)
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static int set_bits(u32 port, u32 mask, u32 val)
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{
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u32 reg32;
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int count;
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/* Write (val & mask) to port */
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val &= mask;
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reg32 = read32(port);
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reg32 &= ~mask;
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reg32 |= val;
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write32(port, reg32);
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/* Wait for readback of register to
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* match what was just written to it
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*/
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count = 50;
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do {
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/* Wait 1ms based on BKDG wait time */
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mdelay(1);
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reg32 = read32(port);
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reg32 &= mask;
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} while ((reg32 != val) && --count);
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/* Timeout occurred */
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if (!count)
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return -1;
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return 0;
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}
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static int codec_detect(u32 base)
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{
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u32 reg32;
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int count;
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/* Set Bit 0 to 1 to exit reset state (BAR + 0x8)[0] */
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if (set_bits(base + 0x08, 1, 1) == -1)
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goto no_codec;
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/* clear STATESTS bits (BAR + 0xE)[2:0] */
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reg32 = read32(base + 0x0E);
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reg32 |= 7;
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write32(base + 0x0E, reg32);
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/* Wait for readback of register to
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* match what was just written to it
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*/
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count = 50;
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do {
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/* Wait 1ms based on BKDG wait time */
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mdelay(1);
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reg32 = read32(base + 0x0E);
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} while ((reg32 != 0) && --count);
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/* Timeout occured */
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if (!count)
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goto no_codec;
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/* Set Bit0 to 0 to enter reset state (BAR + 0x8)[0] */
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if (set_bits(base + 0x08, 1, 0) == -1)
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goto no_codec;
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/* Set Bit 0 to 1 to exit reset state (BAR + 0x8)[0] */
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if (set_bits(base + 0x08, 1, 1) == -1)
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goto no_codec;
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/* Read in Codec location (BAR + 0xe)[2..0] */
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reg32 = read32(base + 0xe);
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reg32 &= 0x0f;
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if (!reg32)
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goto no_codec;
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return reg32;
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no_codec:
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/* Codec Not found */
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/* Put HDA back in reset (BAR + 0x8) [0] */
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set_bits(base + 0x08, 1, 0);
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printk(BIOS_DEBUG, "azalia_audio: No codec!\n");
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return 0;
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}
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const u32 *cim_verb_data = NULL;
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u32 cim_verb_data_size = 0;
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static u32 find_verb(struct device *dev, u32 viddid, const u32 ** verb)
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{
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printk(BIOS_DEBUG, "azalia_audio: dev=%s\n", dev_path(dev));
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printk(BIOS_DEBUG, "azalia_audio: Reading viddid=%x\n", viddid);
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int idx = 0;
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while (idx < (cim_verb_data_size / sizeof(u32))) {
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u32 verb_size = 4 * cim_verb_data[idx + 2]; // in u32
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if (cim_verb_data[idx] != viddid) {
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idx += verb_size + 3; // skip verb + header
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continue;
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}
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*verb = &cim_verb_data[idx + 3];
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return verb_size;
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}
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/* Not all codecs need to load another verb */
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return 0;
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}
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/**
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* Wait 50usec for the codec to indicate it is ready
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* no response would imply that the codec is non-operative
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*/
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static int wait_for_ready(u32 base)
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{
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/* Use a 50 usec timeout - the Linux kernel uses the
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* same duration */
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int timeout = 50;
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while (timeout--) {
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u32 reg32 = read32(base + HDA_ICII_REG);
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if (!(reg32 & HDA_ICII_BUSY))
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return 0;
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udelay(1);
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}
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return -1;
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}
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/**
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* Wait 50usec for the codec to indicate that it accepted
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* the previous command. No response would imply that the code
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* is non-operative
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*/
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static int wait_for_valid(u32 base)
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{
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/* Use a 50 usec timeout - the Linux kernel uses the
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* same duration */
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int timeout = 25;
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write32(base + HDA_ICII_REG, HDA_ICII_VALID | HDA_ICII_BUSY);
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while (timeout--) {
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udelay(1);
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}
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timeout = 50;
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while (timeout--) {
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u32 reg32 = read32(base + HDA_ICII_REG);
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if ((reg32 & (HDA_ICII_VALID | HDA_ICII_BUSY)) ==
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HDA_ICII_VALID)
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return 0;
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udelay(1);
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}
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return -1;
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}
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static void codec_init(struct device *dev, u32 base, int addr)
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{
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u32 reg32;
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const u32 *verb;
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u32 verb_size;
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int i;
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printk(BIOS_DEBUG, "azalia_audio: Initializing codec #%d\n", addr);
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/* 1 */
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if (wait_for_ready(base) == -1)
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return;
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reg32 = (addr << 28) | 0x000f0000;
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write32(base + 0x60, reg32);
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if (wait_for_valid(base) == -1)
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return;
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reg32 = read32(base + 0x64);
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/* 2 */
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printk(BIOS_DEBUG, "azalia_audio: codec viddid: %08x\n", reg32);
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verb_size = find_verb(dev, reg32, &verb);
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if (!verb_size) {
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printk(BIOS_DEBUG, "azalia_audio: No verb!\n");
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return;
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}
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printk(BIOS_DEBUG, "azalia_audio: verb_size: %d\n", verb_size);
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/* 3 */
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for (i = 0; i < verb_size; i++) {
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if (wait_for_ready(base) == -1)
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return;
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write32(base + 0x60, verb[i]);
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if (wait_for_valid(base) == -1)
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return;
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}
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printk(BIOS_DEBUG, "azalia_audio: verb loaded.\n");
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}
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static void codecs_init(struct device *dev, u32 base, u32 codec_mask)
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{
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int i;
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for (i = 2; i >= 0; i--) {
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if (codec_mask & (1 << i))
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codec_init(dev, base, i);
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}
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}
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void azalia_audio_init(struct device *dev)
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{
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u32 base;
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struct resource *res;
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u32 codec_mask;
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res = find_resource(dev, 0x10);
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if (!res)
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return;
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// NOTE this will break as soon as the azalia_audio get's a bar above
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// 4G. Is there anything we can do about it?
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base = (u32) res->base;
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printk(BIOS_DEBUG, "azalia_audio: base = %08x\n", (u32) base);
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codec_mask = codec_detect(base);
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if (codec_mask) {
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printk(BIOS_DEBUG, "azalia_audio: codec_mask = %02x\n",
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codec_mask);
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codecs_init(dev, base, codec_mask);
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}
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}
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struct pci_operations azalia_audio_pci_ops = {
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.set_subsystem = pci_dev_set_subsystem,
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};
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struct device_operations default_azalia_audio_ops = {
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.read_resources = pci_dev_read_resources,
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.set_resources = pci_dev_set_resources,
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.enable_resources = pci_dev_enable_resources,
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.init = azalia_audio_init,
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.scan_bus = 0,
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.ops_pci = &azalia_audio_pci_ops,
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};
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@ -0,0 +1,28 @@
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/*
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* This file is part of the coreboot project.
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*
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* Copyright (C) 2013 DMP Electronics Inc.
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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,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef DEVICE_AZALIA_H
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#define DEVICE_AZALIA_H
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#include <device/device.h>
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void azalia_audio_init(struct device *dev);
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extern struct device_operations default_azalia_audio_ops;
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#endif /* DEVICE_AZALIA_H */
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