mirror of
https://github.com/AsahiLinux/u-boot
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83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
176 lines
4.1 KiB
C
176 lines
4.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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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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#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 <linux/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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/* 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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#define GEN2_SESS_VLD_CTRL_EN (1 << 7)
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#define SESS_VLD_CTRL (1 << 25)
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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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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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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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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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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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/* 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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/* Enable sess_vld */
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setbits_le32(&ehci->genconfig2, GEN2_SESS_VLD_CTRL_EN);
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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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/* USB_OTG_HS_AHB_BURST */
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writel(0x0, &ehci->sbuscfg);
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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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/* set mode to host controller */
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writel(CM_HOST, &ehci->usbmode);
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return 0;
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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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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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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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ret = board_prepare_usb(USB_INIT_HOST);
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if (ret < 0)
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return ret;
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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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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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ret = ehci_deregister(dev);
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if (ret)
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return ret;
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/* Stop controller. */
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clrbits_le32(&ehci->usbcmd, CMD_RUN);
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reset_usb_phy(p);
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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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/* Reset controller */
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setbits_le32(&ehci->usbcmd, CMD_RESET);
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/* Wait for reset */
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if (wait_for_bit_le32(&ehci->usbcmd, CMD_RESET, false, 30, 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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return 0;
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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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priv->ulpi_vp.port_num = 0;
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priv->ehci = (void *)devfdt_get_addr(dev);
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if (priv->ehci == (void *)FDT_ADDR_T_NONE)
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return -EINVAL;
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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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return 0;
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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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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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