This sb800 code is derived from sb700.

Signed-off-by: Zheng Bao <zheng.bao@amd.com>
Acked-by: Stefan Reinauer <stepan@coreboot.org>


git-svn-id: svn://svn.coreboot.org/coreboot/trunk@6277 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

1 files changed, 213 insertions, 0 deletions

diff --git a/src/southbridge/amd/sb800/hda.c b/src/southbridge/amd/sb800/hda.c
new file mode 100644
index 0000000000..07ae70b49f
--- /dev/null
+++ b/src/southbridge/amd/sb800/hda.c
@@ -0,0 +1,213 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2010 Advanced Micro Devices, 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 <arch/io.h>
+#include <delay.h>
+#include "sb800.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 dword;
+	int count;
+
+	/* Write (val & ~mask) to port */
+	val &= mask;
+	dword = read32(port);
+	dword &= ~mask;
+	dword |= val;
+	write32(port, dword);
+
+	/* 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);
+		dword = read32(port);
+		dword &= mask;
+	} while ((dword != val) && --count);
+
+	/* Timeout occured */
+	if (!count)
+		return -1;
+	return 0;
+}
+
+static u32 codec_detect(u32 base)
+{
+	u32 dword;
+
+	/* Before Codec detection, we need to set the GPIO167-170 as
+	 * AZ_SDINx. */
+	/* 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;
+
+	/* Delay for 1 ms since the BKDG does */
+	mdelay(1);
+
+	/* Read in Codec location (BAR + 0xe)[3..0]*/
+	dword = read32(base + 0xe);
+	dword &= 0x0F;
+	if (!dword)
+		goto no_codec;
+
+	return dword;
+
+no_codec:
+	/* Codec Not found */
+	/* Put HDA back in reset (BAR + 0x8) [0] */
+	set_bits(base + 0x08, 1, 0);
+	printk(BIOS_DEBUG, "No codec!\n");
+	return 0;
+}
+
+/**
+ *  Wait 50usec for 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 dword=read32(base +  HDA_ICII_REG);
+		if (!(dword & HDA_ICII_BUSY))
+			return 0;
+		udelay(1);
+	}
+
+	return -1;
+}
+
+/**
+ *  Wait 50usec for 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 = 50;
+	while(timeout--) {
+		u32 dword = read32(base + HDA_ICII_REG);
+		if ((dword & (HDA_ICII_VALID | HDA_ICII_BUSY)) ==
+			HDA_ICII_VALID)
+			return 0;
+		udelay(1);
+	}
+
+	return 1;
+}
+
+static void codec_init(u32 base, int addr)
+{
+	u32 dword;
+
+	/* 1 */
+	if (wait_for_ready(base) == -1)
+		return;
+
+	dword = (addr << 28) | 0x000f0000;
+	write32(base + 0x60, dword);
+
+	if (wait_for_valid(base) == -1)
+		return;
+
+	dword = read32(base + 0x64);
+
+	/* 2 */
+	printk(BIOS_DEBUG, "%x(th) codec viddid: %08x\n", addr, dword);
+}
+
+static void codecs_init(u32 base, u32 codec_mask)
+{
+	int i;
+	for (i = 3; i >= 0; i--) {
+		if (codec_mask & (1 << i))
+			codec_init(base, i);
+	}
+}
+
+static void hda_init(struct device *dev)
+{
+	u32 dword;
+	u32 base;
+	struct resource *res;
+	u32 codec_mask;
+
+	/* Program the 2C to 0x437b1002 */
+	dword = 0x43831002;
+	pci_write_config32(dev, 0x2c, dword);
+
+	/* Read in BAR */
+	/* Is this right? HDA allows for a 64-bit BAR
+	 * but this is only setup for a 32-bit one
+	 */
+	res = find_resource(dev, 0x10);
+	if (!res)
+		return;
+
+	base = (u32)res->base;
+	printk(BIOS_DEBUG, "base = 0x%x\n", base);
+	codec_mask = codec_detect(base);
+
+	if (codec_mask) {
+		printk(BIOS_DEBUG, "codec_mask = %02x\n", codec_mask);
+		codecs_init(base, codec_mask);
+	}
+}
+
+static struct pci_operations lops_pci = {
+	.set_subsystem = pci_dev_set_subsystem,
+};
+
+static struct device_operations hda_audio_ops = {
+	.read_resources = pci_dev_read_resources,
+	.set_resources = pci_dev_set_resources,
+	.enable_resources = pci_dev_enable_resources,
+	.init = hda_init,
+	.scan_bus = 0,
+	.ops_pci = &lops_pci,
+};
+
+static const struct pci_driver hdaaudio_driver __pci_driver = {
+	.ops = &hda_audio_ops,
+	.vendor = PCI_VENDOR_ID_ATI,
+	.device = PCI_DEVICE_ID_ATI_SB800_HDA,
+};