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path: root/drivers/usb/host/xhci-fsl.c
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Diffstat (limited to 'drivers/usb/host/xhci-fsl.c')
-rw-r--r--drivers/usb/host/xhci-fsl.c111
1 files changed, 111 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci-fsl.c b/drivers/usb/host/xhci-fsl.c
new file mode 100644
index 0000000000..6481e07823
--- /dev/null
+++ b/drivers/usb/host/xhci-fsl.c
@@ -0,0 +1,111 @@
+/*
+ * Copyright 2015 Freescale Semiconductor, Inc.
+ *
+ * FSL USB HOST xHCI Controller
+ *
+ * Author: Ramneek Mehresh<ramneek.mehresh@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/xhci-fsl.h>
+#include <linux/usb/dwc3.h>
+#include "xhci.h"
+
+/* Declare global data pointer */
+DECLARE_GLOBAL_DATA_PTR;
+
+static struct fsl_xhci fsl_xhci;
+unsigned long ctr_addr[] = FSL_USB_XHCI_ADDR;
+
+__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 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);
+
+ /* Set GFLADJ_30MHZ as 20h as per XHCI spec default value */
+ dwc3_set_fladj(fsl_xhci->dwc3_reg, GFLADJ_30MHZ_DEFAULT);
+
+ return ret;
+}
+
+static int fsl_xhci_core_exit(struct fsl_xhci *fsl_xhci)
+{
+ /*
+ * Currently fsl 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 fsl_xhci *ctx = &fsl_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 = fsl_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 *)((uintptr_t) *hccr
+ + HC_LENGTH(xhci_readl(&(*hccr)->cr_capbase)));
+
+ debug("fsl-xhci: init hccr %lx and hcor %lx hc_length %lx\n",
+ (uintptr_t)*hccr, (uintptr_t)*hcor,
+ (uintptr_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);
+}