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@@ -0,0 +1,178 @@
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+/*
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+ * Qualcomm EHCI driver
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+ *
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+ * (C) Copyright 2015 Mateusz Kulikowski <mateusz.kulikowski@gmail.com>
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+ *
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+ * Based on Linux driver
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+ *
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+ * SPDX-License-Identifier: GPL-2.0+
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+ */
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+
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+#include <common.h>
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+#include <dm.h>
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+#include <errno.h>
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+#include <fdtdec.h>
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+#include <libfdt.h>
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+#include <usb.h>
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+#include <usb/ehci-ci.h>
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+#include <usb/ulpi.h>
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+#include <wait_bit.h>
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+#include <asm/gpio.h>
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+#include <asm/io.h>
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+#include <linux/compat.h>
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+#include "ehci.h"
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+
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+/* PHY viewport regs */
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+#define ULPI_MISC_A_READ 0x96
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+#define ULPI_MISC_A_SET 0x97
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+#define ULPI_MISC_A_CLEAR 0x98
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+#define ULPI_MISC_A_VBUSVLDEXTSEL (1 << 1)
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+#define ULPI_MISC_A_VBUSVLDEXT (1 << 0)
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+
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+#define GEN2_SESS_VLD_CTRL_EN (1 << 7)
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+
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+#define SESS_VLD_CTRL (1 << 25)
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+
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+struct msm_ehci_priv {
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+ struct ehci_ctrl ctrl; /* Needed by EHCI */
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+ struct usb_ehci *ehci; /* Start of IP core*/
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+ struct ulpi_viewport ulpi_vp; /* ULPI Viewport */
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+};
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+
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+int __weak board_prepare_usb(enum usb_init_type type)
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+{
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+ return 0;
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+}
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+
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+static void setup_usb_phy(struct msm_ehci_priv *priv)
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+{
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+ /* Select and enable external configuration with USB PHY */
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+ ulpi_write(&priv->ulpi_vp, (u8 *)ULPI_MISC_A_SET,
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+ ULPI_MISC_A_VBUSVLDEXTSEL | ULPI_MISC_A_VBUSVLDEXT);
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+}
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+
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+static void reset_usb_phy(struct msm_ehci_priv *priv)
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+{
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+ /* Disable VBUS mimicing in the controller. */
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+ ulpi_write(&priv->ulpi_vp, (u8 *)ULPI_MISC_A_CLEAR,
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+ ULPI_MISC_A_VBUSVLDEXTSEL | ULPI_MISC_A_VBUSVLDEXT);
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+}
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+
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+
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+static int msm_init_after_reset(struct ehci_ctrl *dev)
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+{
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+ struct msm_ehci_priv *p = container_of(dev, struct msm_ehci_priv, ctrl);
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+ struct usb_ehci *ehci = p->ehci;
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+
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+ /* select ULPI phy */
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+ writel(PORT_PTS_ULPI, &ehci->portsc);
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+ setup_usb_phy(p);
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+
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+ /* Enable sess_vld */
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+ setbits_le32(&ehci->genconfig2, GEN2_SESS_VLD_CTRL_EN);
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+
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+ /* Enable external vbus configuration in the LINK */
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+ setbits_le32(&ehci->usbcmd, SESS_VLD_CTRL);
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+
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+ /* USB_OTG_HS_AHB_BURST */
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+ writel(0x0, &ehci->sbuscfg);
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+
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+ /* USB_OTG_HS_AHB_MODE: HPROT_MODE */
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+ /* Bus access related config. */
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+ writel(0x08, &ehci->sbusmode);
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+
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+ /* set mode to host controller */
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+ writel(CM_HOST, &ehci->usbmode);
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+
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+ return 0;
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+}
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+
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+static const struct ehci_ops msm_ehci_ops = {
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+ .init_after_reset = msm_init_after_reset
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+};
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+
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+static int ehci_usb_probe(struct udevice *dev)
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+{
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+ struct msm_ehci_priv *p = dev_get_priv(dev);
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+ struct usb_ehci *ehci = p->ehci;
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+ struct ehci_hccr *hccr;
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+ struct ehci_hcor *hcor;
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+ int ret;
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+
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+ hccr = (struct ehci_hccr *)((phys_addr_t)&ehci->caplength);
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+ hcor = (struct ehci_hcor *)((phys_addr_t)hccr +
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+ HC_LENGTH(ehci_readl(&(hccr)->cr_capbase)));
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+
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+ ret = board_prepare_usb(USB_INIT_HOST);
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+ if (ret < 0)
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+ return ret;
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+
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+ return ehci_register(dev, hccr, hcor, &msm_ehci_ops, 0, USB_INIT_HOST);
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+}
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+
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+static int ehci_usb_remove(struct udevice *dev)
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+{
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+ struct msm_ehci_priv *p = dev_get_priv(dev);
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+ struct usb_ehci *ehci = p->ehci;
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+ int ret;
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+
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+ ret = ehci_deregister(dev);
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+ if (ret)
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+ return ret;
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+
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+ /* Stop controller. */
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+ clrbits_le32(&ehci->usbcmd, CMD_RUN);
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+
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+ reset_usb_phy(p);
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+
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+ ret = board_prepare_usb(USB_INIT_DEVICE); /* Board specific hook */
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+ if (ret < 0)
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+ return ret;
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+
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+ /* Reset controller */
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+ setbits_le32(&ehci->usbcmd, CMD_RESET);
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+
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+ /* Wait for reset */
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+ if (wait_for_bit(__func__, &ehci->usbcmd, CMD_RESET, false, 30,
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+ false)) {
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+ printf("Stuck on USB reset.\n");
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+ return -ETIMEDOUT;
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+ }
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+
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+ return 0;
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+}
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+
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+static int ehci_usb_ofdata_to_platdata(struct udevice *dev)
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+{
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+ struct msm_ehci_priv *priv = dev_get_priv(dev);
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+
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+ priv->ulpi_vp.port_num = 0;
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+ priv->ehci = (void *)dev_get_addr(dev);
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+
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+ if (priv->ehci == (void *)FDT_ADDR_T_NONE)
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+ return -EINVAL;
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+
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+ /* Warning: this will not work if viewport address is > 64 bit due to
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+ * ULPI design.
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+ */
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+ priv->ulpi_vp.viewport_addr = (phys_addr_t)&priv->ehci->ulpi_viewpoint;
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+
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+ return 0;
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+}
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+
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+static const struct udevice_id ehci_usb_ids[] = {
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+ { .compatible = "qcom,ehci-host", },
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+ { }
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+};
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+
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+U_BOOT_DRIVER(usb_ehci) = {
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+ .name = "ehci_msm",
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+ .id = UCLASS_USB,
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+ .of_match = ehci_usb_ids,
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+ .ofdata_to_platdata = ehci_usb_ofdata_to_platdata,
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+ .probe = ehci_usb_probe,
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+ .remove = ehci_usb_remove,
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+ .ops = &ehci_usb_ops,
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+ .priv_auto_alloc_size = sizeof(struct msm_ehci_priv),
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+ .flags = DM_FLAG_ALLOC_PRIV_DMA,
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+};
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