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>

1 files changed, 276 insertions, 0 deletions

diff --git a/src/device/azalia_device.c b/src/device/azalia_device.c
new file mode 100644
index 0000000000..cbc878d920
--- /dev/null
+++ b/src/device/azalia_device.c
@@ -0,0 +1,276 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2013 DMP Electronics 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 <device/device.h>
+#include <device/pci.h>
+#include <device/pci_ids.h>
+#include <device/pci_ops.h>
+#include <device/azalia_device.h>
+#include <arch/io.h>
+#include <delay.h>
+
+#define HDA_ICII_REG 0x68
+#define HDA_ICII_BUSY (1 << 0)
+#define HDA_ICII_VALID (1 << 1)
+
+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;
+}
+
+static int codec_detect(u32 base)
+{
+	u32 reg32;
+	int count;
+
+	/* Set Bit 0 to 1 to exit reset state (BAR + 0x8)[0] */
+	if (set_bits(base + 0x08, 1, 1) == -1)
+		goto no_codec;
+
+	/* clear STATESTS bits (BAR + 0xE)[2:0] */
+	reg32 = read32(base + 0x0E);
+	reg32 |= 7;
+	write32(base + 0x0E, 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(base + 0x0E);
+	} while ((reg32 != 0) && --count);
+	/* Timeout occured */
+	if (!count)
+		goto no_codec;
+
+	/* Set Bit0 to 0 to enter reset state (BAR + 0x8)[0] */
+	if (set_bits(base + 0x08, 1, 0) == -1)
+		goto no_codec;
+
+	/* Set Bit 0 to 1 to exit reset state (BAR + 0x8)[0] */
+	if (set_bits(base + 0x08, 1, 1) == -1)
+		goto no_codec;
+
+	/* Read in Codec location (BAR + 0xe)[2..0] */
+	reg32 = read32(base + 0xe);
+	reg32 &= 0x0f;
+	if (!reg32)
+		goto no_codec;
+
+	return reg32;
+
+no_codec:
+	/* Codec Not found */
+	/* Put HDA back in reset (BAR + 0x8) [0] */
+	set_bits(base + 0x08, 1, 0);
+	printk(BIOS_DEBUG, "azalia_audio: No codec!\n");
+	return 0;
+}
+
+const u32 *cim_verb_data = NULL;
+u32 cim_verb_data_size = 0;
+
+static u32 find_verb(struct device *dev, u32 viddid, const u32 ** verb)
+{
+	printk(BIOS_DEBUG, "azalia_audio: dev=%s\n", dev_path(dev));
+	printk(BIOS_DEBUG, "azalia_audio: Reading viddid=%x\n", viddid);
+
+	int idx = 0;
+
+	while (idx < (cim_verb_data_size / sizeof(u32))) {
+		u32 verb_size = 4 * cim_verb_data[idx + 2];	// in u32
+		if (cim_verb_data[idx] != viddid) {
+			idx += verb_size + 3;	// skip verb + header
+			continue;
+		}
+		*verb = &cim_verb_data[idx + 3];
+		return verb_size;
+	}
+
+	/* Not all codecs need to load another verb */
+	return 0;
+}
+
+/**
+ *  Wait 50usec for the codec to indicate it is ready
+ *  no response would imply that the codec is non-operative
+ */
+
+static int 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 wait_for_valid(u32 base)
+{
+	/* Use a 50 usec timeout - the Linux kernel uses the
+	 * same duration */
+
+	int timeout = 25;
+
+	write32(base + HDA_ICII_REG, HDA_ICII_VALID | HDA_ICII_BUSY);
+	while (timeout--) {
+		udelay(1);
+	}
+	timeout = 50;
+	while (timeout--) {
+		u32 reg32 = read32(base + HDA_ICII_REG);
+		if ((reg32 & (HDA_ICII_VALID | HDA_ICII_BUSY)) ==
+			HDA_ICII_VALID)
+			return 0;
+		udelay(1);
+	}
+
+	return -1;
+}
+
+static void codec_init(struct device *dev, u32 base, int addr)
+{
+	u32 reg32;
+	const u32 *verb;
+	u32 verb_size;
+	int i;
+
+	printk(BIOS_DEBUG, "azalia_audio: Initializing codec #%d\n", addr);
+
+	/* 1 */
+	if (wait_for_ready(base) == -1)
+		return;
+
+	reg32 = (addr << 28) | 0x000f0000;
+	write32(base + 0x60, reg32);
+
+	if (wait_for_valid(base) == -1)
+		return;
+
+	reg32 = read32(base + 0x64);
+
+	/* 2 */
+	printk(BIOS_DEBUG, "azalia_audio: codec viddid: %08x\n", reg32);
+	verb_size = find_verb(dev, reg32, &verb);
+
+	if (!verb_size) {
+		printk(BIOS_DEBUG, "azalia_audio: No verb!\n");
+		return;
+	}
+	printk(BIOS_DEBUG, "azalia_audio: verb_size: %d\n", verb_size);
+
+	/* 3 */
+	for (i = 0; i < verb_size; i++) {
+		if (wait_for_ready(base) == -1)
+			return;
+
+		write32(base + 0x60, verb[i]);
+
+		if (wait_for_valid(base) == -1)
+			return;
+	}
+	printk(BIOS_DEBUG, "azalia_audio: verb loaded.\n");
+}
+
+static void codecs_init(struct device *dev, u32 base, u32 codec_mask)
+{
+	int i;
+
+	for (i = 2; i >= 0; i--) {
+		if (codec_mask & (1 << i))
+			codec_init(dev, base, i);
+	}
+}
+
+void azalia_audio_init(struct device *dev)
+{
+	u32 base;
+	struct resource *res;
+	u32 codec_mask;
+
+	res = find_resource(dev, 0x10);
+	if (!res)
+		return;
+
+	// NOTE this will break as soon as the azalia_audio get's a bar above
+	// 4G. Is there anything we can do about it?
+	base = (u32) res->base;
+	printk(BIOS_DEBUG, "azalia_audio: base = %08x\n", (u32) base);
+	codec_mask = codec_detect(base);
+
+	if (codec_mask) {
+		printk(BIOS_DEBUG, "azalia_audio: codec_mask = %02x\n",
+		       codec_mask);
+		codecs_init(dev, base, codec_mask);
+	}
+}
+
+struct pci_operations azalia_audio_pci_ops = {
+	.set_subsystem = pci_dev_set_subsystem,
+};
+
+struct device_operations default_azalia_audio_ops = {
+	.read_resources		= pci_dev_read_resources,
+	.set_resources		= pci_dev_set_resources,
+	.enable_resources	= pci_dev_enable_resources,
+	.init			= azalia_audio_init,
+	.scan_bus		= 0,
+	.ops_pci		= &azalia_audio_pci_ops,
+};