[U-Boot] [PATCH] fsl/usb: Add USB XHCI support
Ramneek Mehresh
ramneek.mehresh at freescale.com
Fri Jul 25 08:48:56 CEST 2014
Add USB XHCI stack support for USB2.0/USB3.0 devices
Signed-off-by: Ramneek Mehresh <ramneek.mehresh at freescale.com>
---
drivers/usb/host/Makefile | 1 +
drivers/usb/host/xhci-fsl.c | 147 +++++++++++++++++++++++++++++++++++++++++++
include/linux/usb/xhci-fsl.h | 48 ++++++++++++++
3 files changed, 196 insertions(+)
create mode 100644 drivers/usb/host/xhci-fsl.c
create mode 100644 include/linux/usb/xhci-fsl.h
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index 04c1a64..388d13a 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -23,6 +23,7 @@ ifdef CONFIG_MPC512X
obj-$(CONFIG_USB_EHCI_FSL) += ehci-mpc512x.o
else
obj-$(CONFIG_USB_EHCI_FSL) += ehci-fsl.o
+obj-$(CONFIG_USB_XHCI_FSL) += xhci-fsl.o
endif
obj-$(CONFIG_USB_EHCI_FARADAY) += ehci-faraday.o
obj-$(CONFIG_USB_EHCI_EXYNOS) += ehci-exynos.o
diff --git a/drivers/usb/host/xhci-fsl.c b/drivers/usb/host/xhci-fsl.c
new file mode 100644
index 0000000..381c322
--- /dev/null
+++ b/drivers/usb/host/xhci-fsl.c
@@ -0,0 +1,147 @@
+/*
+ * FSL USB HOST xHCI Controller
+ *
+ * (C) Copyright 2014
+ * Freescale Semiconductor, <www.freescale.com>
+ *
+ * Author: Ramneek Mehresh<ramneek.mehresh at freescale.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <usb.h>
+#include <asm-generic/errno.h>
+#include <linux/compat.h>
+#include <linux/usb/dwc3.h>
+#include <linux/usb/xhci-fsl.h>
+#include "xhci.h"
+
+/* Declare global data pointer */
+DECLARE_GLOBAL_DATA_PTR;
+
+static struct fsl_xhci fsl_xhci;
+
+inline int __board_usb_init(int index, enum usb_init_type init)
+{
+ return 0;
+}
+int board_usb_init(int index, enum usb_init_type init)
+ __attribute__((weak, alias("__board_usb_init")));
+
+static void dwc3_set_mode(struct dwc3 *dwc3_reg, u32 mode)
+{
+ clrsetbits_le32(&dwc3_reg->g_ctl,
+ DWC3_GCTL_PRTCAPDIR(DWC3_GCTL_PRTCAP_OTG),
+ DWC3_GCTL_PRTCAPDIR(mode));
+}
+
+static void dwc3_core_soft_reset(struct dwc3 *dwc3_reg)
+{
+ /* Before Resetting PHY, put Core in Reset */
+ setbits_le32(&dwc3_reg->g_ctl, DWC3_GCTL_CORESOFTRESET);
+
+ /* After PHYs are stable we can take Core out of reset state */
+ clrbits_le32(&dwc3_reg->g_ctl, DWC3_GCTL_CORESOFTRESET);
+}
+
+static int dwc3_core_init(struct dwc3 *dwc3_reg)
+{
+ u32 reg;
+ u32 revision;
+ unsigned int dwc3_hwparams1;
+
+ revision = readl(&dwc3_reg->g_snpsid);
+ /* This should read as U3 followed by revision number */
+ if ((revision & DWC3_GSNPSID_MASK) != 0x55330000) {
+ puts("this is not a DesignWare USB3 DRD Core\n");
+ return -1;
+ }
+
+ dwc3_core_soft_reset(dwc3_reg);
+
+ dwc3_hwparams1 = readl(&dwc3_reg->g_hwparams1);
+
+ reg = readl(&dwc3_reg->g_ctl);
+ reg &= ~DWC3_GCTL_SCALEDOWN_MASK;
+ reg &= ~DWC3_GCTL_DISSCRAMBLE;
+ switch (DWC3_GHWPARAMS1_EN_PWROPT(dwc3_hwparams1)) {
+ case DWC3_GHWPARAMS1_EN_PWROPT_CLK:
+ reg &= ~DWC3_GCTL_DSBLCLKGTNG;
+ break;
+ default:
+ debug("No power optimization available\n");
+ }
+
+ /*
+ * WORKAROUND: DWC3 revisions <1.90a have a bug
+ * where the device can fail to connect at SuperSpeed
+ * and falls back to high-speed mode which causes
+ * the device to enter a Connect/Disconnect loop
+ */
+ if ((revision & DWC3_REVISION_MASK) < 0x190a)
+ reg |= DWC3_GCTL_U2RSTECN;
+
+ writel(reg, &dwc3_reg->g_ctl);
+
+ return 0;
+}
+
+static int fsl_xhci_core_init(struct fsl_xhci *fsl_xhci)
+{
+ int ret = 0;
+
+ ret = dwc3_core_init(fsl_xhci->dwc3_reg);
+ if (ret) {
+ debug("%s:failed to initialize core\n", __func__);
+ return ret;
+ }
+
+ /* We are hard-coding DWC3 core to Host Mode */
+ dwc3_set_mode(fsl_xhci->dwc3_reg, DWC3_GCTL_PRTCAP_HOST);
+
+ return ret;
+}
+
+static void fsl_xhci_core_exit(struct fsl_xhci *fsl_xhci)
+{
+ return;
+}
+
+int xhci_hcd_init(int index, struct xhci_hccr **hccr, struct xhci_hcor **hcor)
+{
+ struct fsl_xhci *ctx = &fsl_xhci;
+ int ret = 0;
+
+ ctx->hcd = (struct xhci_hccr *)FSL_XHCI_BASE;
+ ctx->dwc3_reg = (struct dwc3 *)(FSL_XHCI_BASE + DWC3_REG_OFFSET);
+
+ ret = board_usb_init(index, USB_INIT_HOST);
+ if (ret != 0) {
+ puts("Failed to initialize board for USB\n");
+ return ret;
+ }
+
+ ret = fsl_xhci_core_init(ctx);
+ if (ret < 0) {
+ puts("Failed to initialize xhci\n");
+ return ret;
+ }
+
+ *hccr = (struct xhci_hccr *)(FSL_XHCI_BASE);
+ *hcor = (struct xhci_hcor *)((uint32_t) *hccr
+ + HC_LENGTH(xhci_readl(&(*hccr)->cr_capbase)));
+
+ debug("fsl-xhci: init hccr %x and hcor %x hc_length %d\n",
+ (uint32_t)*hccr, (uint32_t)*hcor,
+ (uint32_t)HC_LENGTH(xhci_readl(&(*hccr)->cr_capbase)));
+
+ return ret;
+}
+
+void xhci_hcd_stop(int index)
+{
+ struct fsl_xhci *ctx = &fsl_xhci;
+
+ fsl_xhci_core_exit(ctx);
+}
diff --git a/include/linux/usb/xhci-fsl.h b/include/linux/usb/xhci-fsl.h
new file mode 100644
index 0000000..1dc1e12
--- /dev/null
+++ b/include/linux/usb/xhci-fsl.h
@@ -0,0 +1,48 @@
+/*
+ * (C) Copyright 2014
+ * Freescale Semiconductor Inc, <www.freescale.com>
+ *
+ * Author: Ramneek Mehresh <ramneek.mehresh at freescale.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef _ASM_ARCH_XHCI_FSL_H_
+#define _ASM_ARCH_XHCI_FSL_H_
+
+/* Default to the FSL XHCI defines */
+#define FSL_XHCI_BASE 0x3100000
+
+/* USBOTGSS_WRAPPER definitions */
+#define USBOTGSS_WRAPRESET (1 << 17)
+#define USBOTGSS_DMADISABLE (1 << 16)
+#define USBOTGSS_STANDBYMODE_NO_STANDBY (1 << 4)
+#define USBOTGSS_STANDBYMODE_SMRT (1 << 5)
+#define USBOTGSS_STANDBYMODE_SMRT_WKUP (0x3 << 4)
+#define USBOTGSS_IDLEMODE_NOIDLE (1 << 2)
+#define USBOTGSS_IDLEMODE_SMRT (1 << 3)
+#define USBOTGSS_IDLEMODE_SMRT_WKUP (0x3 << 2)
+
+/* USBOTGSS_IRQENABLE_SET_0 bit */
+#define USBOTGSS_COREIRQ_EN (1 << 0)
+
+/* USBOTGSS_IRQENABLE_SET_1 bits */
+#define USBOTGSS_IRQ_SET_1_IDPULLUP_FALL_EN (1 << 0)
+#define USBOTGSS_IRQ_SET_1_DISCHRGVBUS_FALL_EN (1 << 3)
+#define USBOTGSS_IRQ_SET_1_CHRGVBUS_FALL_EN (1 << 4)
+#define USBOTGSS_IRQ_SET_1_DRVVBUS_FALL_EN (1 << 5)
+#define USBOTGSS_IRQ_SET_1_IDPULLUP_RISE_EN (1 << 8)
+#define USBOTGSS_IRQ_SET_1_DISCHRGVBUS_RISE_EN (1 << 11)
+#define USBOTGSS_IRQ_SET_1_CHRGVBUS_RISE_EN (1 << 12)
+#define USBOTGSS_IRQ_SET_1_DRVVBUS_RISE_EN (1 << 13)
+#define USBOTGSS_IRQ_SET_1_OEVT_EN (1 << 16)
+#define USBOTGSS_IRQ_SET_1_DMADISABLECLR_EN (1 << 17)
+
+#define DWC3_REG_OFFSET 0xc100
+
+struct fsl_xhci {
+ struct xhci_hccr *hcd;
+ struct dwc3 *dwc3_reg;
+};
+
+#endif /* _ASM_ARCH_XHCI_FSL_H_ */
--
1.8.3.1
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