usb support for nxp
Change-Id: I6dcde575f96d8e277424f57fac24110580a124e4
diff --git a/system/dev/board/imx8mevk/imx8mevk-usb.c b/system/dev/board/imx8mevk/imx8mevk-usb.c
new file mode 100644
index 0000000..dbde181
--- /dev/null
+++ b/system/dev/board/imx8mevk/imx8mevk-usb.c
@@ -0,0 +1,121 @@
+// Copyright 2018 The Fuchsia Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include <ddk/debug.h>
+#include <ddk/device.h>
+#include <ddk/protocol/platform-bus.h>
+#include <ddk/protocol/platform-defs.h>
+
+#include <soc/imx8m/imx8m.h>
+#include <soc/imx8m/imx8m-hw.h>
+#include <soc/imx8m/imx8m-iomux.h>
+#include <soc/imx8m/imx8m-gpio.h>
+#include <limits.h>
+#include <hw/reg.h>
+
+#include "imx8mevk.h"
+
+#define BIT(nr) (1UL << (nr))
+#define USBMIX_PHY_OFFSET 0xF0040
+
+#define PHY_CTRL0_REF_SSP_EN BIT(2)
+#define PHY_CTRL1_RESET BIT(0)
+#define PHY_CTRL1_ATERESET BIT(3)
+#define PHY_CTRL1_VDATSRCENB0 BIT(19)
+#define PHY_CTRL1_VDATDETENB0 BIT(20)
+#define PHY_CTRL2_TXENABLEN0 BIT(8)
+#define USBMIX_PHY_OFFSET 0xF0040
+#define PHY_CTRL0_REF_SSP_EN BIT(2)
+#define PHY_CTRL1_RESET BIT(0)
+#define PHY_CTRL1_ATERESET BIT(3)
+#define PHY_CTRL1_VDATSRCENB0 BIT(19)
+#define PHY_CTRL1_VDATDETENB0 BIT(20)
+#define PHY_CTRL2_TXENABLEN0 BIT(8)
+
+static const pbus_mmio_t xhci_mmios[] = {
+ {
+ .base = IMX8M_USB2_BASE,
+ .length = IMX8M_USB2_LENGTH,
+ },
+};
+
+static const pbus_irq_t xhci_irqs[] = {
+ {
+ .irq = IMX8M_A53_INTR_USB2,
+ .mode = ZX_INTERRUPT_MODE_EDGE_HIGH,
+ },
+};
+
+static const pbus_bti_t xhci_btis[] = {
+ {
+ .iommu_index = 0,
+ .bti_id = BTI_USB_XHCI,
+ },
+};
+
+static const pbus_dev_t xhci_dev = {
+ .name = "xhci",
+ .vid = PDEV_VID_GENERIC,
+ .pid = PDEV_PID_GENERIC,
+ .did = PDEV_DID_USB_XHCI,
+ .mmios = xhci_mmios,
+ .mmio_count = countof(xhci_mmios),
+ .irqs = xhci_irqs,
+ .irq_count = countof(xhci_irqs),
+ .btis = xhci_btis,
+ .bti_count = countof(xhci_btis),
+};
+
+zx_status_t imx_usb_init(imx8mevk_bus_t* bus) {
+ zx_status_t status;
+
+ uint32_t reg;
+
+ zx_handle_t bti;
+ status = iommu_get_bti(&bus->iommu, 0, BTI_BOARD, &bti);
+ if (status != ZX_OK) {
+ zxlogf(ERROR, "%s: iommu_get_bti failed %d\n", __FUNCTION__, status);
+ return status;
+ }
+
+ io_buffer_t usb_phy;
+ status = io_buffer_init_physical(&usb_phy, bti, IMX8M_USB1_BASE, IMX8M_USB1_LENGTH,
+ get_root_resource(), ZX_CACHE_POLICY_UNCACHED_DEVICE);
+ if (status != ZX_OK) {
+ zxlogf(ERROR, "%s io_buffer_init_physical failed %d\n", __FUNCTION__, status);
+ zx_handle_close(bti);
+ return status;
+ }
+
+ volatile void* regs = io_buffer_virt(&usb_phy);
+
+ //TODO: More stuff might be needed if we were to boot from our own bootloader.
+ reg = readl(regs + 0x4);
+ reg &= ~(PHY_CTRL1_VDATSRCENB0 | PHY_CTRL1_VDATDETENB0);
+ reg |= PHY_CTRL1_RESET | PHY_CTRL1_ATERESET;
+ writel(reg, regs + 0x4);
+
+ reg = readl(regs + 0x0);
+ reg |= PHY_CTRL0_REF_SSP_EN;
+ writel(reg, regs + 0x0);
+
+ reg = readl(regs + 0x8);
+ reg |= PHY_CTRL2_TXENABLEN0;
+ writel(reg, regs + 0x8);
+
+ reg = readl(regs + 0x4);
+ reg &= ~(PHY_CTRL1_RESET | PHY_CTRL1_ATERESET);
+ writel(reg, regs + 0x4);
+
+ io_buffer_release(&usb_phy);
+ zx_handle_close(bti);
+
+ if ((status = pbus_device_add(&bus->pbus, &xhci_dev, 0)) != ZX_OK) {
+ zxlogf(ERROR, "%s could not add xhci_dev: %d\n", __FUNCTION__, status);
+ return status;
+ }
+
+ return ZX_OK;
+
+}
\ No newline at end of file
diff --git a/system/dev/board/imx8mevk/imx8mevk.c b/system/dev/board/imx8mevk/imx8mevk.c
index 3405162..8f27df7 100644
--- a/system/dev/board/imx8mevk/imx8mevk.c
+++ b/system/dev/board/imx8mevk/imx8mevk.c
@@ -70,6 +70,11 @@
goto fail;
}
+ if ((status = imx_usb_init(bus)) != ZX_OK) {
+ zxlogf(ERROR, "%s: failed %d\n", __FUNCTION__, status);
+ goto fail;
+ }
+
return ZX_OK;
fail:
diff --git a/system/dev/board/imx8mevk/imx8mevk.h b/system/dev/board/imx8mevk/imx8mevk.h
index fc8541a..6e0a4ae 100644
--- a/system/dev/board/imx8mevk/imx8mevk.h
+++ b/system/dev/board/imx8mevk/imx8mevk.h
@@ -16,7 +16,7 @@
enum
{
BTI_BOARD,
- BTI_IOMUX,
+ BTI_USB_XHCI,
};
typedef struct {
@@ -31,4 +31,5 @@
} imx8mevk_bus_t;
-zx_status_t imx8m_gpio_init(imx8mevk_bus_t* bus);
\ No newline at end of file
+zx_status_t imx8m_gpio_init(imx8mevk_bus_t* bus);
+zx_status_t imx_usb_init(imx8mevk_bus_t* bus);
\ No newline at end of file
diff --git a/system/dev/board/imx8mevk/rules.mk b/system/dev/board/imx8mevk/rules.mk
index ee3bd20..5f052c8 100644
--- a/system/dev/board/imx8mevk/rules.mk
+++ b/system/dev/board/imx8mevk/rules.mk
@@ -11,6 +11,7 @@
MODULE_SRCS += \
$(LOCAL_DIR)/imx8mevk.c \
$(LOCAL_DIR)/imx8mevk-gpio.c \
+ $(LOCAL_DIR)/imx8mevk-usb.c \
MODULE_STATIC_LIBS := \
system/dev/soc/imx8m \
