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From 9bfb8614dbf1d9800ef8251cb3d839bcdbe5577f Mon Sep 17 00:00:00 2001
From: Angel Pons <th3fanbus@gmail.com>
Date: Fri, 6 May 2022 23:17:39 +0200
Subject: [PATCH 05/26] sb/intel/lynxpoint: Add native USB init
Implement native USB initialisation for Lynx Point. This is only needed
when MRC.bin is not used.
TO DO: Figure out how to deal with the FIXME's and TODO's lying around.
Change-Id: Ie0fbeeca7b1ca1557173772d733fd2fa27703373
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
---
.../haswell/native_raminit/raminit_native.c | 3 +
src/southbridge/intel/lynxpoint/Makefile.inc | 2 +-
src/southbridge/intel/lynxpoint/early_usb.c | 11 -
.../intel/lynxpoint/early_usb_native.c | 584 ++++++++++++++++++
src/southbridge/intel/lynxpoint/pch.h | 49 ++
5 files changed, 637 insertions(+), 12 deletions(-)
create mode 100644 src/southbridge/intel/lynxpoint/early_usb_native.c
diff --git a/src/northbridge/intel/haswell/native_raminit/raminit_native.c b/src/northbridge/intel/haswell/native_raminit/raminit_native.c
index 6a002548c1..ef61d4ee09 100644
--- a/src/northbridge/intel/haswell/native_raminit/raminit_native.c
+++ b/src/northbridge/intel/haswell/native_raminit/raminit_native.c
@@ -5,6 +5,7 @@
#include <northbridge/intel/haswell/haswell.h>
#include <northbridge/intel/haswell/raminit.h>
#include <southbridge/intel/lynxpoint/me.h>
+#include <southbridge/intel/lynxpoint/pch.h>
#include <types.h>
static bool early_init_native(int s3resume)
@@ -15,6 +16,8 @@ static bool early_init_native(int s3resume)
/** TODO: CPU replacement check must be skipped in warm boots and S3 resumes **/
const bool cpu_replaced = !s3resume && intel_early_me_cpu_replacement_check();
+ early_usb_init();
+
if (!CONFIG(INTEL_LYNXPOINT_LP))
dmi_early_init();
diff --git a/src/southbridge/intel/lynxpoint/Makefile.inc b/src/southbridge/intel/lynxpoint/Makefile.inc
index b8503ac8bc..0e1f2fe4eb 100644
--- a/src/southbridge/intel/lynxpoint/Makefile.inc
+++ b/src/southbridge/intel/lynxpoint/Makefile.inc
@@ -37,7 +37,7 @@ bootblock-y += early_pch.c
romstage-y += early_usb.c early_me.c me_status.c early_pch.c
romstage-y += pmutil.c
-romstage-$(CONFIG_USE_NATIVE_RAMINIT) += early_pch_native.c
+romstage-$(CONFIG_USE_NATIVE_RAMINIT) += early_pch_native.c early_usb_native.c iobp.c
ifeq ($(CONFIG_INTEL_LYNXPOINT_LP),y)
romstage-y += lp_gpio.c
diff --git a/src/southbridge/intel/lynxpoint/early_usb.c b/src/southbridge/intel/lynxpoint/early_usb.c
index a753681ce0..52e8ac17f8 100644
--- a/src/southbridge/intel/lynxpoint/early_usb.c
+++ b/src/southbridge/intel/lynxpoint/early_usb.c
@@ -4,17 +4,6 @@
#include <device/pci_def.h>
#include "pch.h"
-/* HCD_INDEX == 2 selects 0:1a.0 (PCH_EHCI2), any other index
- * selects 0:1d.0 (PCH_EHCI1) for usbdebug use.
- */
-#if CONFIG_USBDEBUG_HCD_INDEX != 2
-#define PCH_EHCI1_TEMP_BAR0 CONFIG_EHCI_BAR
-#define PCH_EHCI2_TEMP_BAR0 (PCH_EHCI1_TEMP_BAR0 + 0x400)
-#else
-#define PCH_EHCI2_TEMP_BAR0 CONFIG_EHCI_BAR
-#define PCH_EHCI1_TEMP_BAR0 (PCH_EHCI2_TEMP_BAR0 + 0x400)
-#endif
-
/*
* Setup USB controller MMIO BAR to prevent the
* reference code from resetting the controller.
diff --git a/src/southbridge/intel/lynxpoint/early_usb_native.c b/src/southbridge/intel/lynxpoint/early_usb_native.c
new file mode 100644
index 0000000000..cb6f6ee8e6
--- /dev/null
+++ b/src/southbridge/intel/lynxpoint/early_usb_native.c
@@ -0,0 +1,584 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include <console/console.h>
+#include <delay.h>
+#include <device/mmio.h>
+#include <device/pci_def.h>
+#include <device/pci_ops.h>
+#include <northbridge/intel/haswell/haswell.h>
+#include <northbridge/intel/haswell/raminit.h>
+#include <southbridge/intel/lynxpoint/iobp.h>
+#include <southbridge/intel/lynxpoint/pch.h>
+#include <timer.h>
+#include <types.h>
+
+static unsigned int is_usbr_enabled(void)
+{
+ return !!(pci_read_config32(PCH_XHCI_DEV, XHCI_USB3FUS) & BIT(5));
+}
+
+static char *const xhci_bar = (char *)PCH_XHCI_TEMP_BAR0;
+
+static void ehci_hcs_init(const pci_devfn_t dev, const uintptr_t ehci_bar)
+{
+ pci_write_config32(dev, PCI_BASE_ADDRESS_0, ehci_bar);
+
+ /** FIXME: Determine whether Bus Master is required (or clean it up afterwards) **/
+ pci_or_config16(dev, PCI_COMMAND, PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY);
+
+ char *const mem_bar = (char *)ehci_bar;
+
+ /**
+ * Shared EHCI/XHCI ports w/a.
+ * This step is required when some of the ports are routed to EHCI
+ * and other ports are routed XHCI at the same time.
+ *
+ * FIXME: Under which conditions should this be done?
+ */
+ pci_and_config16(dev, 0x78, ~0x03);
+
+ /* Skip reset if usbdebug is enabled */
+ if (!CONFIG(USBDEBUG_IN_PRE_RAM))
+ setbits32(mem_bar + EHCI_USB_CMD, EHCI_USB_CMD_HCRESET);
+
+ /* 2: Configure number of controllers and ports */
+ pci_or_config16(dev, EHCI_ACCESS_CNTL, ACCESS_CNTL_ENABLE);
+ clrsetbits32(mem_bar + EHCI_HCS_PARAMS, 0xf << 12, 0);
+ clrsetbits32(mem_bar + EHCI_HCS_PARAMS, 0xf << 0, 2 + is_usbr_enabled());
+ pci_and_config16(dev, EHCI_ACCESS_CNTL, ~ACCESS_CNTL_ENABLE);
+
+ pci_or_config16(dev, 0x78, BIT(2));
+ pci_or_config16(dev, 0x7c, BIT(14) | BIT(7));
+ pci_update_config32(dev, 0x8c, ~(0xf << 8), (4 << 8));
+ pci_update_config32(dev, 0x8c, ~BIT(26), BIT(17));
+}
+
+static inline unsigned int physical_port_count(void)
+{
+ return MAX_USB2_PORTS;
+}
+
+static unsigned int hs_port_count(void)
+{
+ /** TODO: Apparently, WPT-LP has 10 USB2 ports **/
+ if (CONFIG(INTEL_LYNXPOINT_LP))
+ return 8;
+
+ switch ((pci_read_config32(PCH_XHCI_DEV, XHCI_USB3FUS) >> 1) & 3) {
+ case 3:
+ return 8;
+ case 2:
+ return 10;
+ case 1:
+ return 12;
+ case 0:
+ default:
+ return 14;
+ }
+}
+
+static unsigned int ss_port_count(void)
+{
+ if (CONFIG(INTEL_LYNXPOINT_LP))
+ return 4;
+
+ switch ((pci_read_config32(PCH_XHCI_DEV, XHCI_USB3FUS) >> 3) & 3) {
+ case 3:
+ return 0;
+ case 2:
+ return 2;
+ case 1:
+ return 4;
+ case 0:
+ default:
+ return 6;
+ }
+}
+
+static void common_ehci_hcs_init(void)
+{
+ const bool is_lp = CONFIG(INTEL_LYNXPOINT_LP);
+
+ ehci_hcs_init(PCH_EHCI1_DEV, PCH_EHCI1_TEMP_BAR0);
+ if (!is_lp)
+ ehci_hcs_init(PCH_EHCI2_DEV, PCH_EHCI2_TEMP_BAR0);
+
+ pch_iobp_update(0xe5007f04, 0, 0x00004481);
+
+ for (unsigned int port = 0; port < physical_port_count(); port++)
+ pch_iobp_update(0xe500400f + port * 0x100, ~(1 << 0), 0 << 0);
+
+ pch_iobp_update(0xe5007f14, ~(3 << 19), (3 << 19));
+
+ if (is_lp)
+ pch_iobp_update(0xe5007f02, ~(3 << 22), (0 << 22));
+}
+
+static void xhci_open_memory_space(void)
+{
+ /** FIXME: Determine whether Bus Master is required (or clean it up afterwards) **/
+ pci_write_config32(PCH_XHCI_DEV, PCI_BASE_ADDRESS_0, (uintptr_t)xhci_bar);
+ pci_or_config16(PCH_XHCI_DEV, PCI_COMMAND, PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY);
+}
+
+static void xhci_close_memory_space(void)
+{
+ pci_and_config16(PCH_XHCI_DEV, PCI_COMMAND, ~(PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY));
+ pci_write_config32(PCH_XHCI_DEV, PCI_BASE_ADDRESS_0, 0);
+}
+
+static void common_xhci_hc_init(void)
+{
+ const bool is_lp = CONFIG(INTEL_LYNXPOINT_LP);
+
+ if (!is_lp) {
+ const unsigned int max_ports = 15 + ss_port_count();
+ clrsetbits32(xhci_bar + XHCI_HCS_PARAMS_1, 0xf << 28, max_ports << 28);
+ }
+
+ clrsetbits32(xhci_bar + XHCI_HCS_PARAMS_3, 0xffff << 16 | 0xff, 0x200 << 16 | 0x0a);
+ clrsetbits32(xhci_bar + XHCI_HCC_PARAMS, BIT(5), BIT(10) | BIT(9));
+
+ if (!is_lp)
+ clrsetbits32(xhci_bar + 0x8008, BIT(19), 0);
+
+ if (is_lp)
+ clrsetbits32(xhci_bar + 0x8058, BIT(8), BIT(16));
+ else
+ clrsetbits32(xhci_bar + 0x8058, BIT(8), BIT(16) | BIT(20));
+
+ clrsetbits32(xhci_bar + 0x8060, 0, BIT(25) | BIT(18));
+ clrsetbits32(xhci_bar + 0x8090, 0, BIT(14) | BIT(8));
+ clrsetbits32(xhci_bar + 0x8094, 0, BIT(23) | BIT(21) | BIT(14));
+ clrsetbits32(xhci_bar + 0x80e0, BIT(16), BIT(6));
+ clrsetbits32(xhci_bar + 0x80ec, (7 << 12) | (7 << 9), (0 << 12) | (6 << 9));
+ clrsetbits32(xhci_bar + 0x80f0, BIT(20), 0);
+
+ if (is_lp)
+ clrsetbits32(xhci_bar + 0x80fc, 0, BIT(25));
+
+ if (is_lp)
+ clrsetbits32(xhci_bar + 0x8110, BIT(8) | BIT(2), BIT(20) | BIT(11));
+ else
+ clrsetbits32(xhci_bar + 0x8110, BIT(2), BIT(20) | BIT(11));
+
+ if (is_lp)
+ write32(xhci_bar + 0x8140, 0xff00f03c);
+ else
+ write32(xhci_bar + 0x8140, 0xff03c132);
+
+ if (is_lp)
+ clrsetbits32(xhci_bar + 0x8154, BIT(21), BIT(13));
+ else
+ clrsetbits32(xhci_bar + 0x8154, BIT(21) | BIT(13), 0);
+
+ clrsetbits32(xhci_bar + 0x8154, BIT(3), 0);
+
+ if (is_lp) {
+ clrsetbits32(xhci_bar + 0x8164, 0, BIT(1) | BIT(0));
+ write32(xhci_bar + 0x8174, 0x01400c0a);
+ write32(xhci_bar + 0x817c, 0x033200a3);
+ write32(xhci_bar + 0x8180, 0x00cb0028);
+ write32(xhci_bar + 0x8184, 0x0064001e);
+ }
+
+ /*
+ * Note: Register at offset 0x44 is 32-bit, but bit 31 is write-once.
+ * We use these weird partial accesses here to avoid locking bit 31.
+ */
+ pci_or_config16(PCH_XHCI_DEV, 0x44, BIT(15) | BIT(14) | BIT(10) | BIT(0));
+ pci_or_config8(PCH_XHCI_DEV, 0x44 + 2, 0x0f);
+
+ /* LPT-LP >= B0 */
+ if (is_lp)
+ clrsetbits32(xhci_bar + 0x8188, 0, BIT(26) | BIT(24));
+
+ /* LPT-H >= C0 */
+ if (!is_lp)
+ clrsetbits32(xhci_bar + 0x8188, 0, BIT(24));
+}
+
+static inline bool is_mem_sr(void)
+{
+ return pci_read_config16(PCH_LPC_DEV, GEN_PMCON_2) & GEN_PMCON_2_MEM_SR;
+}
+
+static bool should_restore_xhci_smart_auto(void)
+{
+ if (!is_mem_sr())
+ return false;
+
+ return pci_read_config32(PCH_LPC_DEV, PMIR) & PMIR_XHCI_SMART_AUTO;
+}
+
+enum usb_port_route {
+ ROUTE_TO_EHCI,
+ ROUTE_TO_XHCI,
+};
+
+/* Returns whether port reset was successful */
+static bool reset_usb2_ports(const unsigned int ehci_ports)
+{
+ for (unsigned int port = 0; port < ehci_ports; port++) {
+ /* Initiate port reset for all USB2 ports */
+ clrsetbits32(
+ xhci_bar + XHCI_USB2_PORTSC(port),
+ XHCI_USB2_PORTSC_PED,
+ XHCI_USB2_PORTSC_PR);
+ }
+ /* Poll for port reset bit to be cleared or time out at 100ms */
+ struct stopwatch timer;
+ stopwatch_init_msecs_expire(&timer, 100);
+ uint32_t reg32;
+ do {
+ reg32 = 0;
+ for (unsigned int port = 0; port < ehci_ports; port++)
+ reg32 |= read32(xhci_bar + XHCI_USB2_PORTSC(port));
+
+ reg32 &= XHCI_USB2_PORTSC_PR;
+ if (!reg32) {
+ const long elapsed_time = stopwatch_duration_usecs(&timer);
+ printk(BIOS_DEBUG, "%s: took %lu usecs\n", __func__, elapsed_time);
+ return true;
+ }
+ /* Reference code has a 10 ms delay here, but a smaller delay works too */
+ udelay(100);
+ } while (!stopwatch_expired(&timer));
+ printk(BIOS_ERR, "%s: timed out\n", __func__);
+ return !reg32;
+}
+
+/* Returns whether warm reset was successful */
+static bool warm_reset_usb3_ports(const unsigned int xhci_ports)
+{
+ for (unsigned int port = 0; port < xhci_ports; port++) {
+ /* Initiate warm reset for all USB3 ports */
+ clrsetbits32(
+ xhci_bar + XHCI_USB3_PORTSC(port),
+ XHCI_USB3_PORTSC_PED,
+ XHCI_USB3_PORTSC_WPR);
+ }
+ /* Poll for port reset bit to be cleared or time out at 100ms */
+ struct stopwatch timer;
+ stopwatch_init_msecs_expire(&timer, 100);
+ uint32_t reg32;
+ do {
+ reg32 = 0;
+ for (unsigned int port = 0; port < xhci_ports; port++)
+ reg32 |= read32(xhci_bar + XHCI_USB3_PORTSC(port));
+
+ reg32 &= XHCI_USB3_PORTSC_PR;
+ if (!reg32) {
+ const long elapsed_time = stopwatch_duration_usecs(&timer);
+ printk(BIOS_DEBUG, "%s: took %lu usecs\n", __func__, elapsed_time);
+ return true;
+ }
+ /* Reference code has a 10 ms delay here, but a smaller delay works too */
+ udelay(100);
+ } while (!stopwatch_expired(&timer));
+ printk(BIOS_ERR, "%s: timed out\n", __func__);
+ return !reg32;
+}
+
+static void perform_xhci_ehci_switching_flow(const enum usb_port_route usb_route)
+{
+ const pci_devfn_t dev = PCH_XHCI_DEV;
+
+ const unsigned int ehci_ports = hs_port_count() + is_usbr_enabled();
+ const unsigned int xhci_ports = ss_port_count();
+
+ const uint32_t ehci_mask = BIT(ehci_ports) - 1;
+ const uint32_t xhci_mask = BIT(xhci_ports) - 1;
+
+ /** TODO: Handle USBr port? How, though? **/
+ pci_update_config32(dev, XHCI_USB2PRM, ~XHCI_USB2PR_HCSEL, ehci_mask);
+ pci_update_config32(dev, XHCI_USB3PRM, ~XHCI_USB3PR_SSEN, xhci_mask);
+
+ /*
+ * Workaround for USB2PR / USB3PR value not surviving warm reset.
+ * Restore USB Port Routing registers if OS HC Switch driver has been executed.
+ */
+ if (should_restore_xhci_smart_auto()) {
+ /** FIXME: Derive values from mainboard code instead? **/
+ pci_update_config32(dev, XHCI_USB2PR, ~XHCI_USB2PR_HCSEL, ehci_mask);
+ pci_update_config32(dev, XHCI_USB3PR, ~XHCI_USB3PR_SSEN, xhci_mask);
+ }
+
+ /* Later stages shouldn't need the value of this bit */
+ pci_and_config32(PCH_LPC_DEV, PMIR, ~PMIR_XHCI_SMART_AUTO);
+
+ /**
+ * FIXME: Things here depend on the chosen routing mode.
+ * For now, implement both functions.
+ */
+
+ /* Route to EHCI if xHCI disabled or auto mode */
+ if (usb_route == ROUTE_TO_EHCI) {
+ if (!reset_usb2_ports(ehci_ports))
+ printk(BIOS_ERR, "USB2 port reset timed out\n");
+
+ pci_and_config32(dev, XHCI_USB2PR, ~XHCI_USB2PR_HCSEL);
+
+ for (unsigned int port = 0; port < ehci_ports; port++) {
+ clrsetbits32(
+ xhci_bar + XHCI_USB2_PORTSC(port),
+ XHCI_USB2_PORTSC_PED,
+ XHCI_USB2_PORTSC_CHST);
+ }
+
+ if (!warm_reset_usb3_ports(xhci_ports))
+ printk(BIOS_ERR, "USB3 warm reset timed out\n");
+
+ /* FIXME: BWG says this should be inside the warm reset function */
+ pci_and_config32(dev, XHCI_USB3PR, ~XHCI_USB3PR_SSEN);
+
+ for (unsigned int port = 0; port < ehci_ports; port++) {
+ clrsetbits32(
+ xhci_bar + XHCI_USB3_PORTSC(port),
+ XHCI_USB3_PORTSC_PED,
+ XHCI_USB3_PORTSC_CHST);
+ }
+
+ setbits32(xhci_bar + XHCI_USBCMD, BIT(0));
+ clrbits32(xhci_bar + XHCI_USBCMD, BIT(0));
+ }
+
+ /* Route to xHCI if xHCI enabled */
+ if (usb_route == ROUTE_TO_XHCI) {
+ if (is_mem_sr()) {
+ if (!warm_reset_usb3_ports(xhci_ports))
+ printk(BIOS_ERR, "USB3 warm reset timed out\n");
+ }
+
+ const uint32_t xhci_port_mask = pci_read_config32(dev, XHCI_USB3PRM) & 0x3f;
+ pci_update_config32(dev, XHCI_USB3PR, ~XHCI_USB3PR_SSEN, xhci_port_mask);
+
+ const uint32_t ehci_port_mask = pci_read_config32(dev, XHCI_USB2PRM) & 0x7fff;
+ pci_update_config32(dev, XHCI_USB2PR, ~XHCI_USB2PR_HCSEL, ehci_port_mask);
+ }
+}
+
+/* Do not shift in this macro, as it can cause undefined behaviour for bad port/oc values */
+#define PORT_TO_OC_SHIFT(port, oc) ((oc) * 8 + (port))
+
+/* Avoid shifting into undefined behaviour */
+static inline bool shift_ok(const int shift)
+{
+ return shift >= 0 && shift < 32;
+}
+
+static void usb_overcurrent_mapping(void)
+{
+ const bool is_lp = CONFIG(INTEL_LYNXPOINT_LP);
+
+ uint32_t ehci_1_ocmap = 0;
+ uint32_t ehci_2_ocmap = 0;
+ uint32_t xhci_1_ocmap = 0;
+ uint32_t xhci_2_ocmap = 0;
+
+ /*
+ * EHCI
+ */
+ for (unsigned int idx = 0; idx < physical_port_count(); idx++) {
+ const struct usb2_port_config *const port = &mainboard_usb2_ports[idx];
+ printk(BIOS_DEBUG, "USB2 port %u => ", idx);
+ if (!port->enable) {
+ printk(BIOS_DEBUG, "disabled\n");
+ continue;
+ }
+ const unsigned short oc_pin = port->oc_pin;
+ if (oc_pin == USB_OC_PIN_SKIP) {
+ printk(BIOS_DEBUG, "not mapped to OC pin\n");
+ continue;
+ }
+ /* Ports 0 .. 7 => OC 0 .. 3 */
+ if (idx < 8 && oc_pin <= 3) {
+ const int shift = PORT_TO_OC_SHIFT(idx, oc_pin);
+ if (shift_ok(shift)) {
+ printk(BIOS_DEBUG, "mapped to OC pin %u\n", oc_pin);
+ ehci_1_ocmap |= 1 << shift;
+ continue;
+ }
+ }
+ /* Ports 8 .. 13 => OC 4 .. 7 (LPT-H only) */
+ if (!is_lp && idx >= 8 && oc_pin >= 4) {
+ const int shift = PORT_TO_OC_SHIFT(idx, oc_pin - 4);
+ if (shift_ok(shift)) {
+ printk(BIOS_DEBUG, "mapped to OC pin %u\n", oc_pin);
+ ehci_2_ocmap |= 1 << shift;
+ continue;
+ }
+ }
+ printk(BIOS_ERR, "Invalid OC pin %u for USB2 port %u\n", oc_pin, idx);
+ }
+ printk(BIOS_DEBUG, "\n");
+ pci_write_config32(PCH_EHCI1_DEV, EHCI_OCMAP, ehci_1_ocmap);
+ if (!is_lp)
+ pci_write_config32(PCH_EHCI2_DEV, EHCI_OCMAP, ehci_2_ocmap);
+
+ /*
+ * xHCI
+ */
+ for (unsigned int idx = 0; idx < ss_port_count(); idx++) {
+ const struct usb3_port_config *const port = &mainboard_usb3_ports[idx];
+ printk(BIOS_DEBUG, "USB3 port %u => ", idx);
+ if (!port->enable) {
+ printk(BIOS_DEBUG, "disabled\n");
+ continue;
+ }
+ const unsigned short oc_pin = port->oc_pin;
+ if (oc_pin == USB_OC_PIN_SKIP) {
+ printk(BIOS_DEBUG, "not mapped to OC pin\n");
+ continue;
+ }
+ /* Ports 0 .. 5 => OC 0 .. 3 */
+ if (oc_pin <= 3) {
+ const int shift = PORT_TO_OC_SHIFT(idx, oc_pin);
+ if (shift_ok(shift)) {
+ printk(BIOS_DEBUG, "mapped to OC pin %u\n", oc_pin);
+ xhci_1_ocmap |= 1 << shift;
+ continue;
+ }
+ }
+ /* Ports 0 .. 5 => OC 4 .. 7 (LPT-H only) */
+ if (!is_lp && oc_pin >= 4) {
+ const int shift = PORT_TO_OC_SHIFT(idx, oc_pin - 4);
+ if (shift_ok(shift)) {
+ printk(BIOS_DEBUG, "mapped to OC pin %u\n", oc_pin);
+ xhci_2_ocmap |= 1 << shift;
+ continue;
+ }
+ }
+ printk(BIOS_ERR, "Invalid OC pin %u for USB3 port %u\n", oc_pin, idx);
+ }
+ printk(BIOS_DEBUG, "\n");
+ pci_write_config32(PCH_XHCI_DEV, XHCI_U2OCM1, ehci_1_ocmap);
+ pci_write_config32(PCH_XHCI_DEV, XHCI_U3OCM1, xhci_1_ocmap);
+ if (!is_lp) {
+ pci_write_config32(PCH_XHCI_DEV, XHCI_U2OCM2, ehci_2_ocmap);
+ pci_write_config32(PCH_XHCI_DEV, XHCI_U3OCM2, xhci_2_ocmap);
+ }
+}
+
+static uint8_t get_ehci_tune_param_1(const struct usb2_port_config *const port)
+{
+ const bool is_lp = CONFIG(INTEL_LYNXPOINT_LP);
+
+ const enum pch_platform_type plat_type = get_pch_platform_type();
+ const enum usb2_port_location location = port->location;
+ const uint16_t length = port->length;
+ if (!is_lp) {
+ if (plat_type == PCH_TYPE_DESKTOP) {
+ if (location == USB_PORT_BACK_PANEL)
+ return 4; /* Back Panel */
+ else
+ return 3; /* Front Panel */
+
+ } else if (plat_type == PCH_TYPE_MOBILE) {
+ if (location == USB_PORT_INTERNAL)
+ return 5; /* Internal Topology */
+ else if (location == USB_PORT_DOCK)
+ return 4; /* Dock */
+ else if (length < 0x70)
+ return 5; /* Back Panel, less than 7" */
+ else
+ return 6; /* Back Panel, 7" or more */
+ }
+ } else {
+ if (location == USB_PORT_BACK_PANEL || location == USB_PORT_MINI_PCIE) {
+ if (length < 0x70)
+ return 5; /* Back Panel, less than 7" */
+ else
+ return 6; /* Back Panel, 7" or more */
+ } else if (location == USB_PORT_DOCK) {
+ return 4; /* Dock */
+ } else {
+ return 5; /* Internal Topology */
+ }
+ }
+ printk(BIOS_ERR, "%s: Unhandled case\n", __func__);
+ return 0;
+}
+
+static uint8_t get_ehci_tune_param_2(const struct usb2_port_config *const port)
+{
+ const bool is_lp = CONFIG(INTEL_LYNXPOINT_LP);
+
+ const enum pch_platform_type plat_type = get_pch_platform_type();
+ const enum usb2_port_location location = port->location;
+ const uint16_t length = port->length;
+ if (!is_lp) {
+ if (plat_type == PCH_TYPE_DESKTOP) {
+ if (location == USB_PORT_BACK_PANEL) {
+ if (length < 0x80)
+ return 2; /* Back Panel, less than 8" */
+ else if (length < 0x130)
+ return 3; /* Back Panel, 8"-13" */
+ else
+ return 4; /* Back Panel, 13" or more */
+ } else {
+ return 2; /* Front Panel */
+ }
+
+ } else if (plat_type == PCH_TYPE_MOBILE) {
+ if (location == USB_PORT_INTERNAL) {
+ return 2; /* Internal Topology */
+ } else if (location == USB_PORT_DOCK) {
+ if (length < 0x50)
+ return 1; /* Dock, less than 5" */
+ else
+ return 2; /* Dock, 5" or more */
+ } else {
+ if (length < 0x100)
+ return 2; /* Back Panel, less than 10" */
+ else
+ return 3; /* Back Panel, 10" or more */
+ }
+ }
+ } else {
+ if (location == USB_PORT_BACK_PANEL || location == USB_PORT_MINI_PCIE) {
+ if (length < 0x100)
+ return 2; /* Back Panel, less than 10" */
+ else
+ return 3; /* Back Panel, 10" or more */
+ } else if (location == USB_PORT_DOCK) {
+ if (length < 0x50)
+ return 1; /* Dock, less than 5" */
+ else
+ return 2; /* Dock, 5" or more */
+ } else {
+ return 2; /* Internal Topology */
+ }
+ }
+ printk(BIOS_ERR, "%s: Unhandled case\n", __func__);
+ return 0;
+}
+
+static void program_ehci_port_length(void)
+{
+ for (unsigned int port = 0; port < physical_port_count(); port++) {
+ if (!mainboard_usb2_ports[port].enable)
+ continue;
+ const uint32_t addr = 0xe5004000 + (port + 1) * 0x100;
+ const uint8_t param_1 = get_ehci_tune_param_1(&mainboard_usb2_ports[port]);
+ const uint8_t param_2 = get_ehci_tune_param_2(&mainboard_usb2_ports[port]);
+ pch_iobp_update(addr, ~0x7f00, param_2 << 11 | param_1 << 8);
+ }
+}
+
+void early_usb_init(void)
+{
+ /** TODO: Make this configurable? How do the modes affect usbdebug? **/
+ const enum usb_port_route usb_route = ROUTE_TO_XHCI;
+ ///(pd->boot_mode == 2 && pd->usb_xhci_on_resume) ? ROUTE_TO_XHCI : ROUTE_TO_EHCI;
+
+ common_ehci_hcs_init();
+ xhci_open_memory_space();
+ common_xhci_hc_init();
+ perform_xhci_ehci_switching_flow(usb_route);
+ usb_overcurrent_mapping();
+ program_ehci_port_length();
+ /** FIXME: USB per port control is missing, is it needed? **/
+ xhci_close_memory_space();
+ /** TODO: Close EHCI memory space? **/
+}
diff --git a/src/southbridge/intel/lynxpoint/pch.h b/src/southbridge/intel/lynxpoint/pch.h
index b5e0c2a830..ad983d86cf 100644
--- a/src/southbridge/intel/lynxpoint/pch.h
+++ b/src/southbridge/intel/lynxpoint/pch.h
@@ -115,6 +115,7 @@ enum pch_platform_type {
void pch_dmi_setup_physical_layer(void);
void pch_dmi_tc_vc_mapping(u32 vc0, u32 vc1, u32 vcp, u32 vcm);
+void early_usb_init(void);
void usb_ehci_sleep_prepare(pci_devfn_t dev, u8 slp_typ);
void usb_ehci_disable(pci_devfn_t dev);
@@ -202,6 +203,8 @@ void mainboard_config_rcba(void);
#define GEN_PMCON_1 0xa0
#define SMI_LOCK (1 << 4)
#define GEN_PMCON_2 0xa2
+#define GEN_PMCON_2_DISB (1 << 7)
+#define GEN_PMCON_2_MEM_SR (1 << 5)
#define SYSTEM_RESET_STS (1 << 4)
#define THERMTRIP_STS (1 << 3)
#define SYSPWR_FLR (1 << 1)
@@ -215,6 +218,7 @@ void mainboard_config_rcba(void);
#define PMIR 0xac
#define PMIR_CF9LOCK (1 << 31)
#define PMIR_CF9GR (1 << 20)
+#define PMIR_XHCI_SMART_AUTO (1 << 16) /* c.f. LPT BWG or WPT-LP BIOS spec */
/* GEN_PMCON_3 bits */
#define RTC_BATTERY_DEAD (1 << 2)
@@ -282,6 +286,20 @@ void mainboard_config_rcba(void);
#define SATA_DTLE_DATA_SHIFT 24
#define SATA_DTLE_EDGE_SHIFT 16
+/*
+ * HCD_INDEX == 2 selects 0:1a.0 (PCH_EHCI2), any other index
+ * selects 0:1d.0 (PCH_EHCI1) for usbdebug use.
+ */
+#if CONFIG_USBDEBUG_HCD_INDEX != 2
+#define PCH_EHCI1_TEMP_BAR0 CONFIG_EHCI_BAR
+#define PCH_EHCI2_TEMP_BAR0 (PCH_EHCI1_TEMP_BAR0 + 0x400)
+#else
+#define PCH_EHCI2_TEMP_BAR0 CONFIG_EHCI_BAR
+#define PCH_EHCI1_TEMP_BAR0 (PCH_EHCI2_TEMP_BAR0 + 0x400)
+#endif
+
+#define PCH_XHCI_TEMP_BAR0 0xe8100000
+
/* EHCI PCI Registers */
#define EHCI_PWR_CTL_STS 0x54
#define PWR_CTL_SET_MASK 0x3
@@ -289,10 +307,15 @@ void mainboard_config_rcba(void);
#define PWR_CTL_SET_D3 0x3
#define PWR_CTL_ENABLE_PME (1 << 8)
#define PWR_CTL_STATUS_PME (1 << 15)
+#define EHCI_OCMAP 0x74
+#define EHCI_ACCESS_CNTL 0x80
+#define ACCESS_CNTL_ENABLE (1 << 0)
/* EHCI Memory Registers */
+#define EHCI_HCS_PARAMS 0x04
#define EHCI_USB_CMD 0x20
#define EHCI_USB_CMD_RUN (1 << 0)
+#define EHCI_USB_CMD_HCRESET (1 << 1)
#define EHCI_USB_CMD_PSE (1 << 4)
#define EHCI_USB_CMD_ASE (1 << 5)
#define EHCI_PORTSC(port) (0x64 + (port) * 4)
@@ -301,6 +324,10 @@ void mainboard_config_rcba(void);
/* XHCI PCI Registers */
#define XHCI_PWR_CTL_STS 0x74
+#define XHCI_U2OCM1 0xc0
+#define XHCI_U2OCM2 0xc4
+#define XHCI_U3OCM1 0xc8
+#define XHCI_U3OCM2 0xcc
#define XHCI_USB2PR 0xd0
#define XHCI_USB2PRM 0xd4
#define XHCI_USB2PR_HCSEL 0x7fff
@@ -313,6 +340,27 @@ void mainboard_config_rcba(void);
#define XHCI_USB3PDO 0xe8
/* XHCI Memory Registers */
+#define XHCI_HCS_PARAMS_1 0x04
+#define XHCI_HCS_PARAMS_2 0x08
+#define XHCI_HCS_PARAMS_3 0x0c
+#define XHCI_HCC_PARAMS 0x10
+#define XHCI_USBCMD 0x80
+#define XHCI_USB2_PORTSC(port) (0x480 + ((port) * 0x10))
+#define XHCI_USB2_PORTSC_WPR (1 << 31) /* Warm Port Reset */
+#define XHCI_USB2_PORTSC_CEC (1 << 23) /* Port Config Error Change */
+#define XHCI_USB2_PORTSC_PLC (1 << 22) /* Port Link State Change */
+#define XHCI_USB2_PORTSC_PRC (1 << 21) /* Port Reset Change */
+#define XHCI_USB2_PORTSC_OCC (1 << 20) /* Over-current Change */
+#define XHCI_USB2_PORTSC_WRC (1 << 19) /* Warm Port Reset Change */
+#define XHCI_USB2_PORTSC_PEC (1 << 18) /* Port Enabled Disabled Change */
+#define XHCI_USB2_PORTSC_CSC (1 << 17) /* Connect Status Change */
+#define XHCI_USB2_PORTSC_CHST (0x7f << 17)
+#define XHCI_USB2_PORTSC_LWS (1 << 16) /* Port Link State Write Strobe */
+#define XHCI_USB2_PORTSC_PP (1 << 9)
+#define XHCI_USB2_PORTSC_PR (1 << 4) /* Port Reset */
+#define XHCI_USB2_PORTSC_PED (1 << 1) /* Port Enable/Disabled */
+#define XHCI_USB2_PORTSC_CCS (1 << 0) /* Current Connect Status */
+
#define XHCI_USB3_PORTSC(port) ((pch_is_lp() ? 0x510 : 0x570) + ((port) * 0x10))
#define XHCI_USB3_PORTSC_CHST (0x7f << 17)
#define XHCI_USB3_PORTSC_WCE (1 << 25) /* Wake on Connect */
@@ -320,6 +368,7 @@ void mainboard_config_rcba(void);
#define XHCI_USB3_PORTSC_WOE (1 << 27) /* Wake on Overcurrent */
#define XHCI_USB3_PORTSC_WRC (1 << 19) /* Warm Reset Complete */
#define XHCI_USB3_PORTSC_LWS (1 << 16) /* Link Write Strobe */
+#define XHCI_USB3_PORTSC_PR (1 << 4) /* Port Reset */
#define XHCI_USB3_PORTSC_PED (1 << 1) /* Port Enabled/Disabled */
#define XHCI_USB3_PORTSC_WPR (1 << 31) /* Warm Port Reset */
#define XHCI_USB3_PORTSC_PLS (0xf << 5) /* Port Link State */
--
2.39.2
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