soc/intel/apollolake: Move XDCI in its own file

Split out dual-port switching functionality into dedicated xdci.c.

Change-Id: Ia58fc3fb6d017dd0c19cc450d1caba307fc89a7b
Signed-off-by: Andrey Petrov <andrey.petrov@intel.com>
Reviewed-on: https://review.coreboot.org/18226
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

1 files changed, 105 insertions, 0 deletions

diff --git a/src/soc/intel/apollolake/xdci.c b/src/soc/intel/apollolake/xdci.c
new file mode 100644
index 0000000000..28129578c7
--- /dev/null
+++ b/src/soc/intel/apollolake/xdci.c
@@ -0,0 +1,105 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2016 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.
+ */
+
+#include <arch/io.h>
+#include <console/console.h>
+#include <device/device.h>
+#include <device/pci.h>
+#include <device/pci_ids.h>
+#include <soc/pci_devs.h>
+#include <soc/pci_ids.h>
+#include <timer.h>
+
+#define DUAL_ROLE_CFG0		0x80d8
+# define DRD_CONFIG_MASK	(0x3 << 0)
+# define DRD_CONFIG_DYNAMIC	(0x0 << 0)
+# define DRD_CONFIG_HOST	(0x1 << 0)
+# define DRD_CONFIG_DEVICE	(0x2 << 0)
+# define SW_VBUS_VALID_MASK	(1 << 24)
+# define SW_VBUS_DEASSERT_VALID	(0 << 24)
+# define SW_VBUS_ASSERT_VALID	(1 << 24)
+# define SW_IDPIN_EN_MASK	(1 << 21)
+# define SW_IDPIN_DIS		(0 << 21)
+# define SW_IDPIN_EN		(1 << 21)
+# define SW_IDPIN_MASK		(1 << 20)
+# define SW_IDPIN_HOST		(0 << 20)
+# define SW_IDPIN_DEVICE	(1 << 20)
+#define DUAL_ROLE_CFG1		0x80dc
+# define DRD_MODE_MASK		(1 << 29)
+# define DRD_MODE_DEVICE	(0 << 29)
+# define DRD_MODE_HOST		(1 << 29)
+
+static void configure_host_mode_port0(struct device *dev)
+{
+	uint32_t *cfg0;
+	uint32_t *cfg1;
+	const struct resource *res;
+	uint32_t reg;
+	struct stopwatch sw;
+	struct device *xhci_dev = XHCI_DEV;
+
+	/*
+	 * Only default to host mode if the xdci device is present and
+	 * enabled. If it's disabled assume the switch was already done
+	 * in FSP.
+	 */
+	if (!dev->enabled || !xhci_dev->enabled)
+		return;
+
+	printk(BIOS_INFO, "Putting port 0 into host mode.\n");
+
+	res = find_resource(xhci_dev, PCI_BASE_ADDRESS_0);
+
+	cfg0 = (void *)(uintptr_t)(res->base + DUAL_ROLE_CFG0);
+	cfg1 = (void *)(uintptr_t)(res->base + DUAL_ROLE_CFG1);
+
+	reg = read32(cfg0);
+	reg &= ~(DRD_CONFIG_MASK | SW_IDPIN_EN_MASK | SW_IDPIN_MASK);
+	reg &= ~(SW_VBUS_VALID_MASK);
+	reg |= DRD_CONFIG_DYNAMIC | SW_IDPIN_EN | SW_IDPIN_HOST;
+	reg |= SW_VBUS_DEASSERT_VALID;
+	write32(cfg0, reg);
+
+	stopwatch_init_msecs_expire(&sw, 10);
+
+	/* Wait for the host mode status bit. */
+	while ((read32(cfg1) & DRD_MODE_MASK) != DRD_MODE_HOST) {
+		if (stopwatch_expired(&sw)) {
+			printk(BIOS_INFO, "Timed out waiting for host mode.\n");
+			break;
+		}
+	}
+
+	printk(BIOS_INFO, "XHCI port 0 host switch over took %lu ms\n",
+		stopwatch_duration_msecs(&sw));
+}
+
+static void xdci_init(struct device *dev)
+{
+	configure_host_mode_port0(dev);
+}
+
+static const struct device_operations device_ops = {
+	.read_resources		= pci_dev_read_resources,
+	.set_resources		= pci_dev_set_resources,
+	.enable_resources	= pci_dev_enable_resources,
+	.init			= xdci_init,
+};
+
+static const struct pci_driver pmc __pci_driver = {
+	.ops	= &device_ops,
+	.vendor	= PCI_VENDOR_ID_INTEL,
+	.device	= PCI_DEVICE_ID_APOLLOLAKE_XDCI,
+};