sb/intel/ibexpeak: Implement USB current settings

This is based on the sandybridge settings.
The current lookup table comes from the x201 vendor lookup table.

Tested: USB mouse and webcam still work and current registers are the
same as before. USB IR are not but the code follows EDS instead of the
register replay.

Change-Id: Icea9673623a62e7039d5700100a2ee238478abd1
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/35762
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

3 files changed, 126 insertions, 0 deletions

diff --git a/src/southbridge/intel/ibexpeak/Makefile.inc b/src/southbridge/intel/ibexpeak/Makefile.inc
index 9caf29fd87..f22be2453b 100644
--- a/src/southbridge/intel/ibexpeak/Makefile.inc
+++ b/src/southbridge/intel/ibexpeak/Makefile.inc
@@ -43,5 +43,6 @@ romstage-y +=../bd82x6x/me_status.c
 romstage-y += early_thermal.c
 romstage-y += ../bd82x6x/early_rcba.c
 romstage-y += early_cir.c
+romstage-y += early_usb.c
 
 endif
diff --git a/src/southbridge/intel/ibexpeak/early_usb.c b/src/southbridge/intel/ibexpeak/early_usb.c
new file mode 100644
index 0000000000..53c4ae7a95
--- /dev/null
+++ b/src/southbridge/intel/ibexpeak/early_usb.c
@@ -0,0 +1,71 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2014 Vladimir Serbinenko
+ *
+ * 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 <device/mmio.h>
+#include <device/pci_ops.h>
+#include <device/pci_def.h>
+#include <northbridge/intel/sandybridge/sandybridge.h>
+#include <southbridge/intel/common/rcba.h>
+#include <southbridge/intel/common/pmbase.h>
+
+#include "pch.h"
+
+#define TOTAL_USB_PORTS 14
+
+void early_usb_init(const struct southbridge_usb_port *portmap)
+{
+	u32 reg32;
+	const u16 currents[] = { 0xf57, 0xf5f, 0x753, 0x75f, 0x14b, 0x74b,
+				 0x557, 0x757, 0x55f, 0x54b
+	};
+	int i;
+
+	/* Unlock registers.  */
+	write_pmbase16(UPRWC, read_pmbase16(UPRWC) | UPRWC_WR_EN);
+
+	for (i = 0; i < TOTAL_USB_PORTS; i++)
+		RCBA32_AND_OR(USBIR0 + 4 * i, ~0xfff, currents[portmap[i].current]);
+
+	/* USB Initialization Registers. We follow what EDS recommends here.
+	   TODO maybe vendor firmware values are better? */
+	RCBA32(USBIRC) &= ~(1 << 8);
+	RCBA32_OR(USBIRA, (7 << 12) | (7 << 8) | (7 << 4) | (2 << 0));
+	RCBA32_AND_OR(USBIRB, ~0x617f0, (3 << 17) | (1 << 12) | (1 << 10)
+		      | (1 << 8) | (4 << 4));
+	/* Set to Rate Matching Hub Mode to make PCI devices appear. */
+	RCBA32(0x3598) = 0;
+
+	reg32 = 0;
+	for (i = 0; i < TOTAL_USB_PORTS; i++)
+		if (!portmap[i].enabled)
+			reg32 |= (1 << i);
+	RCBA32(USBPDO) = reg32;
+	reg32 = 0;
+	/* The OC pins of the first 8 USB ports are mapped in USBOCM1 */
+	for (i = 0; i < 8; i++)
+		if (portmap[i].enabled && portmap[i].oc_pin >= 0)
+			reg32 |= (1 << (i + 8 * portmap[i].oc_pin));
+	RCBA32(USBOCM1) = reg32;
+	reg32 = 0;
+	/* The OC pins of the remainder 6 USB ports are mapped in USBOCM2 */
+	for (i = 8; i < TOTAL_USB_PORTS; i++)
+		if (portmap[i].enabled && portmap[i].oc_pin >= 4)
+			reg32 |= (1 << (i - 8 + 8 * (portmap[i].oc_pin - 4)));
+	RCBA32(USBOCM2) = reg32;
+
+	/* Relock registers. */
+	write_pmbase16(UPRWC, 0);
+}
diff --git a/src/southbridge/intel/ibexpeak/pch.h b/src/southbridge/intel/ibexpeak/pch.h
index 34f80330bc..556b9e0a0b 100644
--- a/src/southbridge/intel/ibexpeak/pch.h
+++ b/src/southbridge/intel/ibexpeak/pch.h
@@ -66,6 +66,26 @@ void early_thermal_init(void);
 void southbridge_configure_default_intmap(void);
 void pch_setup_cir(int chipset_type);
 
+enum current_lookup_idx {
+	IF1_F57 = 0,
+	IF1_F5F,
+	IF1_753,
+	IF1_75F,
+	IF1_14B,
+	IF1_74B,
+	IF1_557,
+	IF1_757,
+	IF1_55F,
+	IF1_54B,
+};
+
+struct southbridge_usb_port {
+	int enabled;
+	enum current_lookup_idx current;
+	int oc_pin;
+};
+void early_usb_init(const struct southbridge_usb_port *portmap);
+
 #ifndef __ROMCC__
 #include <device/device.h>
 void pch_enable(struct device *dev);
@@ -75,6 +95,10 @@ void pch_enable(struct device *dev);
 #define MAINBOARD_POWER_ON	1
 #define MAINBOARD_POWER_KEEP	2
 
+/* PM I/O Space */
+#define UPRWC			0x3c
+#define  UPRWC_WR_EN		(1 << 1) /* USB Per-Port Registers Write Enable */
+
 /* PCI Configuration Space (D30:F0): PCI2PCI */
 #define PSTS	0x06
 #define SMLT	0x1b
@@ -401,6 +425,36 @@ void pch_enable(struct device *dev);
 #define PCH_DISABLE_MEI1	(1 << 1)
 #define PCH_ENABLE_DBDF		(1 << 0)
 
+/* USB Initialization Registers[13:0] */
+#define USBIR0		0x3500	/* 32bit */
+#define USBIR1		0x3504	/* 32bit */
+#define USBIR2		0x3508	/* 32bit */
+#define USBIR3		0x350c	/* 32bit */
+#define USBIR4		0x3510	/* 32bit */
+#define USBIR5		0x3514	/* 32bit */
+#define USBIR6		0x3518	/* 32bit */
+#define USBIR7		0x351c	/* 32bit */
+#define USBIR8		0x3520	/* 32bit */
+#define USBIR9		0x3524	/* 32bit */
+#define USBIR10		0x3528	/* 32bit */
+#define USBIR11		0x352c	/* 32bit */
+#define USBIR12		0x3530	/* 32bit */
+#define USBIR13		0x3534	/* 32bit */
+
+#define USBIRC		0x3564	/* 32bit */
+#define USBIRA		0x3570	/* 32bit */
+#define USBIRB		0x357c	/* 32bit */
+
+/* Miscellaneous Control Register */
+#define MISCCTL		0x3590	/* 32bit */
+/* USB Port Disable Override */
+#define USBPDO		0x359c	/* 32bit */
+/* USB Overcurrent MAP Register */
+#define USBOCM1		0x35a0	/* 32bit */
+#define USBOCM2		0x35a4	/* 32bit */
+/* Rate Matching Hub Wake Control Register */
+#define RMHWKCTL	0x35b0	/* 32bit */
+
 /* ICH7 PMBASE */
 #define PM1_STS		0x00
 #define   WAK_STS	(1 << 15)