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path: root/drivers/usb/host/ehci-zynq.c
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Diffstat (limited to 'drivers/usb/host/ehci-zynq.c')
-rw-r--r--drivers/usb/host/ehci-zynq.c104
1 files changed, 104 insertions, 0 deletions
diff --git a/drivers/usb/host/ehci-zynq.c b/drivers/usb/host/ehci-zynq.c
new file mode 100644
index 0000000..7770d05
--- /dev/null
+++ b/drivers/usb/host/ehci-zynq.c
@@ -0,0 +1,104 @@
+/*
+ * (C) Copyright 2014, Xilinx, Inc
+ *
+ * USB Low level initialization(Specific to zynq)
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/arch/hardware.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/io.h>
+#include <usb.h>
+#include <usb/ehci-fsl.h>
+#include <usb/ulpi.h>
+
+#include "ehci.h"
+
+#define ZYNQ_USB_USBCMD_RST 0x0000002
+#define ZYNQ_USB_USBCMD_STOP 0x0000000
+#define ZYNQ_USB_NUM_MIO 12
+
+/*
+ * Create the appropriate control structures to manage
+ * a new EHCI host controller.
+ */
+int ehci_hcd_init(int index, enum usb_init_type init, struct ehci_hccr **hccr,
+ struct ehci_hcor **hcor)
+{
+ struct usb_ehci *ehci;
+ struct ulpi_viewport ulpi_vp;
+ int ret, mio_usb;
+ /* Used for writing the ULPI data address */
+ struct ulpi_regs *ulpi = (struct ulpi_regs *)0;
+
+ if (!index) {
+ mio_usb = zynq_slcr_get_mio_pin_status("usb0");
+ if (mio_usb != ZYNQ_USB_NUM_MIO) {
+ printf("usb0 wrong num MIO: %d, Index %d\n", mio_usb,
+ index);
+ return -1;
+ }
+ ehci = (struct usb_ehci *)ZYNQ_USB_BASEADDR0;
+ } else {
+ mio_usb = zynq_slcr_get_mio_pin_status("usb1");
+ if (mio_usb != ZYNQ_USB_NUM_MIO) {
+ printf("usb1 wrong num MIO: %d, Index %d\n", mio_usb,
+ index);
+ return -1;
+ }
+ ehci = (struct usb_ehci *)ZYNQ_USB_BASEADDR1;
+ }
+
+ *hccr = (struct ehci_hccr *)((uint32_t)&ehci->caplength);
+ *hcor = (struct ehci_hcor *)((uint32_t) *hccr +
+ HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase)));
+
+ ulpi_vp.viewport_addr = (u32)&ehci->ulpi_viewpoint;
+ ulpi_vp.port_num = 0;
+
+ ret = ulpi_init(&ulpi_vp);
+ if (ret) {
+ puts("zynq ULPI viewport init failed\n");
+ return -1;
+ }
+
+ /* ULPI set flags */
+ ulpi_write(&ulpi_vp, &ulpi->otg_ctrl,
+ ULPI_OTG_DP_PULLDOWN | ULPI_OTG_DM_PULLDOWN |
+ ULPI_OTG_EXTVBUSIND);
+ ulpi_write(&ulpi_vp, &ulpi->function_ctrl,
+ ULPI_FC_FULL_SPEED | ULPI_FC_OPMODE_NORMAL |
+ ULPI_FC_SUSPENDM);
+ ulpi_write(&ulpi_vp, &ulpi->iface_ctrl, 0);
+
+ /* Set VBus */
+ ulpi_write(&ulpi_vp, &ulpi->otg_ctrl_set,
+ ULPI_OTG_DRVVBUS | ULPI_OTG_DRVVBUS_EXT);
+
+ return 0;
+}
+
+/*
+ * Destroy the appropriate control structures corresponding
+ * the the EHCI host controller.
+ */
+int ehci_hcd_stop(int index)
+{
+ struct usb_ehci *ehci;
+
+ if (!index)
+ ehci = (struct usb_ehci *)ZYNQ_USB_BASEADDR0;
+ else
+ ehci = (struct usb_ehci *)ZYNQ_USB_BASEADDR1;
+
+ /* Stop controller */
+ writel(ZYNQ_USB_USBCMD_STOP, &ehci->usbcmd);
+ udelay(1000);
+
+ /* Initiate controller reset */
+ writel(ZYNQ_USB_USBCMD_RST, &ehci->usbcmd);
+
+ return 0;
+}