usb: zynqmp: Add XHCI driver support

Added USB XHCI driver support for zynqmp.

Signed-off-by: Siva Durga Prasad Paladugu <[email protected]>
Signed-off-by: Michal Simek <[email protected]>

drivers/usb/host/Makefile

@@ -57,6 +57,7 @@ obj-$(CONFIG_USB_XHCI_EXYNOS) += xhci-exynos5.o
 obj-$(CONFIG_USB_XHCI_OMAP) += xhci-omap.o
 obj-$(CONFIG_USB_XHCI_PCI) += xhci-pci.o
 obj-$(CONFIG_USB_XHCI_UNIPHIER) += xhci-uniphier.o
+obj-$(CONFIG_USB_XHCI_ZYNQMP) += xhci-zynqmp.o
 
 # designware
 obj-$(CONFIG_USB_DWC2) += dwc2.o

drivers/usb/host/xhci-zynqmp.c

@@ -0,0 +1,113 @@
+/*
+ * Copyright 2015 Xilinx, Inc.
+ *
+ * Zynq USB HOST xHCI Controller
+ *
+ * Author: Siva Durga Prasad Paladugu <[email protected]>
+ *
+ * This file was resused from Freescale USB xHCI
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <usb.h>
+#include <asm-generic/errno.h>
+#include <asm/arch-zynqmp/hardware.h>
+#include <linux/compat.h>
+#include <linux/usb/xhci-zynqmp.h>
+#include <linux/usb/dwc3.h>
+#include "xhci.h"
+
+/* Declare global data pointer */
+DECLARE_GLOBAL_DATA_PTR;
+
+static struct zynqmp_xhci zynqmp_xhci;
+
+unsigned long ctr_addr[] = {ZYNQMP_USB0_XHCI_BASEADDR,
+			    ZYNQMP_USB1_XHCI_BASEADDR};
+
+__weak int __board_usb_init(int index, enum usb_init_type init)
+{
+	return 0;
+}
+
+void usb_phy_reset(struct dwc3 *dwc3_reg)
+{
+	/* Assert USB3 PHY reset */
+	setbits_le32(&dwc3_reg->g_usb3pipectl[0], DWC3_GUSB3PIPECTL_PHYSOFTRST);
+
+	/* Assert USB2 PHY reset */
+	setbits_le32(&dwc3_reg->g_usb2phycfg, DWC3_GUSB2PHYCFG_PHYSOFTRST);
+
+	mdelay(200);
+
+	/* Clear USB3 PHY reset */
+	clrbits_le32(&dwc3_reg->g_usb3pipectl[0], DWC3_GUSB3PIPECTL_PHYSOFTRST);
+
+	/* Clear USB2 PHY reset */
+	clrbits_le32(&dwc3_reg->g_usb2phycfg, DWC3_GUSB2PHYCFG_PHYSOFTRST);
+}
+
+static int zynqmp_xhci_core_init(struct zynqmp_xhci *zynqmp_xhci)
+{
+	int ret = 0;
+
+	ret = dwc3_core_init(zynqmp_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(zynqmp_xhci->dwc3_reg, DWC3_GCTL_PRTCAP_HOST);
+
+	return ret;
+}
+
+static int zynqmp_xhci_core_exit(struct zynqmp_xhci *zynqmp_xhci)
+{
+	/*
+	 * Currently zynqmp socs do not support PHY shutdown from
+	 * sw. But this support may be added in future socs.
+	 */
+	return 0;
+}
+
+int xhci_hcd_init(int index, struct xhci_hccr **hccr, struct xhci_hcor **hcor)
+{
+	struct zynqmp_xhci *ctx = &zynqmp_xhci;
+	int ret = 0;
+
+	ctx->hcd = (struct xhci_hccr *)ctr_addr[index];
+	ctx->dwc3_reg = (struct dwc3 *)((char *)(ctx->hcd) + 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 = zynqmp_xhci_core_init(ctx);
+	if (ret < 0) {
+		puts("Failed to initialize xhci\n");
+		return ret;
+	}
+
+	*hccr = (struct xhci_hccr *)ctx->hcd;
+	*hcor = (struct xhci_hcor *)((uint32_t) *hccr
+				+ HC_LENGTH(xhci_readl(&(*hccr)->cr_capbase)));
+
+	debug("zynqmp-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 zynqmp_xhci *ctx = &zynqmp_xhci;
+
+	zynqmp_xhci_core_exit(ctx);
+}

include/linux/usb/xhci-zynqmp.h

@@ -0,0 +1,56 @@
+/*
+ * Copyright 2015 Xilinx, Inc.
+ *
+ * Zynq USB HOST xHCI Controller
+ *
+ * Author: Siva Durga Prasad Paladugu <[email protected]>
+ *
+ * This file was resused from Freescale USB xHCI
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef _LINUX_USB_XHCI_ZYNQMP_H_
+#define _LINUX_USB_XHCI_ZYNQMP_H_
+
+/* Default to the FSL XHCI defines */
+#define USB3_PWRCTL_CLK_CMD_MASK	0x3FE000
+#define USB3_PWRCTL_CLK_FREQ_MASK	0xFFC
+#define USB3_PHY_PARTIAL_RX_POWERON	BIT(6)
+#define USB3_PHY_RX_POWERON		BIT(14)
+#define USB3_PHY_TX_POWERON		BIT(15)
+#define USB3_PHY_TX_RX_POWERON	(USB3_PHY_RX_POWERON | USB3_PHY_TX_POWERON)
+#define USB3_PWRCTL_CLK_CMD_SHIFT	14
+#define USB3_PWRCTL_CLK_FREQ_SHIFT	22
+
+/* USBOTGSS_WRAPPER definitions */
+#define USBOTGSS_WRAPRESET		BIT(17)
+#define USBOTGSS_DMADISABLE		BIT(16)
+#define USBOTGSS_STANDBYMODE_NO_STANDBY	BIT(4)
+#define USBOTGSS_STANDBYMODE_SMRT	BIT(5)
+#define USBOTGSS_STANDBYMODE_SMRT_WKUP	(0x3 << 4)
+#define USBOTGSS_IDLEMODE_NOIDLE	BIT(2)
+#define USBOTGSS_IDLEMODE_SMRT		BIT(3)
+#define USBOTGSS_IDLEMODE_SMRT_WKUP	(0x3 << 2)
+
+/* USBOTGSS_IRQENABLE_SET_0 bit */
+#define USBOTGSS_COREIRQ_EN	BIT(1)
+
+/* USBOTGSS_IRQENABLE_SET_1 bits */
+#define USBOTGSS_IRQ_SET_1_IDPULLUP_FALL_EN	BIT(1)
+#define USBOTGSS_IRQ_SET_1_DISCHRGVBUS_FALL_EN	BIT(3)
+#define USBOTGSS_IRQ_SET_1_CHRGVBUS_FALL_EN	BIT(4)
+#define USBOTGSS_IRQ_SET_1_DRVVBUS_FALL_EN	BIT(5)
+#define USBOTGSS_IRQ_SET_1_IDPULLUP_RISE_EN	BIT(8)
+#define USBOTGSS_IRQ_SET_1_DISCHRGVBUS_RISE_EN	BIT(11)
+#define USBOTGSS_IRQ_SET_1_CHRGVBUS_RISE_EN	BIT(12)
+#define USBOTGSS_IRQ_SET_1_DRVVBUS_RISE_EN	BIT(13)
+#define USBOTGSS_IRQ_SET_1_OEVT_EN		BIT(16)
+#define USBOTGSS_IRQ_SET_1_DMADISABLECLR_EN	BIT(17)
+
+struct zynqmp_xhci {
+	struct xhci_hccr *hcd;
+	struct dwc3 *dwc3_reg;
+};
+
+#endif /* _LINUX_USB_XHCI_ZYNQMP_H_ */