+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0+
-/*
- * USB 3.0 DRD Controller
- *
- * (C) Copyright 2012-2014
- * Texas Instruments Incorporated, <www.ti.com>
- */
-
-#include <common.h>
-#include <watchdog.h>
-#include <usb.h>
-#include <asm/arch/psc_defs.h>
-#include <asm/io.h>
-#include <linux/usb/dwc3.h>
-#include <asm/arch/xhci-keystone.h>
-#include <linux/errno.h>
-#include <linux/list.h>
-#include "xhci.h"
-
-struct kdwc3_irq_regs {
- u32 revision; /* 0x000 */
- u32 rsvd0[3];
- u32 sysconfig; /* 0x010 */
- u32 rsvd1[1];
- u32 irq_eoi;
- u32 rsvd2[1];
- struct {
- u32 raw_status;
- u32 status;
- u32 enable_set;
- u32 enable_clr;
- } irqs[16];
-};
-
-struct keystone_xhci {
- struct xhci_hccr *hcd;
- struct dwc3 *dwc3_reg;
- struct xhci_hcor *hcor;
- struct kdwc3_irq_regs *usbss;
- struct keystone_xhci_phy *phy;
-};
-
-struct keystone_xhci keystone;
-
-static void keystone_xhci_phy_set(struct keystone_xhci_phy *phy)
-{
- u32 val;
-
- /*
- * VBUSVLDEXTSEL has a default value of 1 in BootCfg but shouldn't.
- * It should always be cleared because our USB PHY has an onchip VBUS
- * analog comparator.
- */
- val = readl(&phy->phy_clock);
- /* quit selecting the vbusvldextsel by default! */
- val &= ~USB3_PHY_OTG_VBUSVLDECTSEL;
- writel(val, &phy->phy_clock);
-}
-
-static void keystone_xhci_phy_unset(struct keystone_xhci_phy *phy)
-{
- u32 val;
-
- /* Disable the PHY REFCLK clock gate */
- val = readl(&phy->phy_clock);
- val &= ~USB3_PHY_REF_SSP_EN;
- writel(val, &phy->phy_clock);
-}
-
-static int keystone_xhci_core_init(struct dwc3 *dwc3_reg)
-{
- int ret;
-
- ret = dwc3_core_init(dwc3_reg);
- if (ret) {
- debug("failed to initialize core\n");
- return -EINVAL;
- }
-
- /* We are hard-coding DWC3 core to Host Mode */
- dwc3_set_mode(dwc3_reg, DWC3_GCTL_PRTCAP_HOST);
-
- return 0;
-}
-
-int xhci_hcd_init(int index,
- struct xhci_hccr **ret_hccr, struct xhci_hcor **ret_hcor)
-{
- u32 val;
- int ret;
- struct xhci_hccr *hcd;
- struct xhci_hcor *hcor;
- struct kdwc3_irq_regs *usbss;
- struct keystone_xhci_phy *phy;
-
- usbss = (struct kdwc3_irq_regs *)CONFIG_USB_SS_BASE;
- phy = (struct keystone_xhci_phy *)CONFIG_DEV_USB_PHY_BASE;
-
- /* Enable the PHY REFCLK clock gate with phy_ref_ssp_en = 1 */
- val = readl(&(phy->phy_clock));
- val |= USB3_PHY_REF_SSP_EN;
- writel(val, &phy->phy_clock);
-
- mdelay(100);
-
- /* Release USB from reset */
- ret = psc_enable_module(KS2_LPSC_USB);
- if (ret) {
- puts("Cannot enable USB module");
- return -1;
- }
-
- mdelay(100);
-
- /* Initialize usb phy */
- keystone_xhci_phy_set(phy);
-
- /* soft reset usbss */
- writel(1, &usbss->sysconfig);
- while (readl(&usbss->sysconfig) & 1)
- ;
-
- val = readl(&usbss->revision);
- debug("usbss revision %x\n", val);
-
- /* Initialize usb core */
- hcd = (struct xhci_hccr *)CONFIG_USB_HOST_XHCI_BASE;
- keystone.dwc3_reg = (struct dwc3 *)(CONFIG_USB_HOST_XHCI_BASE +
- DWC3_REG_OFFSET);
-
- keystone_xhci_core_init(keystone.dwc3_reg);
-
- /* set register addresses */
- hcor = (struct xhci_hcor *)((uint32_t)hcd +
- HC_LENGTH(readl(&hcd->cr_capbase)));
-
- debug("Keystone2-xhci: init hccr %08x and hcor %08x hc_length %d\n",
- (u32)hcd, (u32)hcor,
- (u32)HC_LENGTH(xhci_readl(&hcd->cr_capbase)));
-
- keystone.usbss = usbss;
- keystone.phy = phy;
- keystone.hcd = hcd;
- keystone.hcor = hcor;
-
- *ret_hccr = hcd;
- *ret_hcor = hcor;
-
- return 0;
-}
-
-static int keystone_xhci_phy_suspend(void)
-{
- int loop_cnt = 0;
- struct xhci_hcor *hcor;
- uint32_t *portsc_1 = NULL;
- uint32_t *portsc_2 = NULL;
- u32 val, usb2_pls, usb3_pls, event_q;
- struct dwc3 *dwc3_reg = keystone.dwc3_reg;
-
- /* set register addresses */
- hcor = keystone.hcor;
-
- /* Bypass Scrambling and Set Shorter Training sequence for simulation */
- val = DWC3_GCTL_PWRDNSCALE(0x4b0) | DWC3_GCTL_PRTCAPDIR(0x2);
- writel(val, &dwc3_reg->g_ctl);
-
- /* GUSB2PHYCFG */
- val = readl(&dwc3_reg->g_usb2phycfg[0]);
-
- /* assert bit 6 (SusPhy) */
- val |= DWC3_GUSB2PHYCFG_SUSPHY;
- writel(val, &dwc3_reg->g_usb2phycfg[0]);
-
- /* GUSB3PIPECTL */
- val = readl(&dwc3_reg->g_usb3pipectl[0]);
-
- /*
- * assert bit 29 to allow PHY to go to suspend when idle
- * and cause the USB3 SS PHY to enter suspend mode
- */
- val |= (BIT(29) | DWC3_GUSB3PIPECTL_SUSPHY);
- writel(val, &dwc3_reg->g_usb3pipectl[0]);
-
- /*
- * Steps necessary to allow controller to suspend even when
- * VBUS is HIGH:
- * - Init DCFG[2:0] (DevSpd) to: 1=FS
- * - Init GEVNTADR0 to point to an eventQ
- * - Init GEVNTSIZ0 to 0x0100 to specify the size of the eventQ
- * - Init DCTL::Run_nStop = 1
- */
- writel(0x00020001, &dwc3_reg->d_cfg);
- /* TODO: local2global( (Uint32) eventQ )? */
- writel((u32)&event_q, &dwc3_reg->g_evnt_buf[0].g_evntadrlo);
- writel(0, &dwc3_reg->g_evnt_buf[0].g_evntadrhi);
- writel(0x4, &dwc3_reg->g_evnt_buf[0].g_evntsiz);
- /* Run */
- writel(DWC3_DCTL_RUN_STOP, &dwc3_reg->d_ctl);
-
- mdelay(100);
-
- /* Wait for USB2 & USB3 PORTSC::PortLinkState to indicate suspend */
- portsc_1 = (uint32_t *)(&hcor->portregs[0].or_portsc);
- portsc_2 = (uint32_t *)(&hcor->portregs[1].or_portsc);
- usb2_pls = 0;
- usb3_pls = 0;
- do {
- ++loop_cnt;
- usb2_pls = (readl(portsc_1) & PORT_PLS_MASK) >> 5;
- usb3_pls = (readl(portsc_2) & PORT_PLS_MASK) >> 5;
- } while (((usb2_pls != 0x4) || (usb3_pls != 0x4)) && loop_cnt < 1000);
-
- if (usb2_pls != 0x4 || usb3_pls != 0x4) {
- debug("USB suspend failed - PLS USB2=%02x, USB3=%02x\n",
- usb2_pls, usb3_pls);
- return -1;
- }
-
- debug("USB2 and USB3 PLS - Disabled, loop_cnt=%d\n", loop_cnt);
- return 0;
-}
-
-void xhci_hcd_stop(int index)
-{
- /* Disable USB */
- if (keystone_xhci_phy_suspend())
- return;
-
- if (psc_disable_module(KS2_LPSC_USB)) {
- debug("PSC disable module USB failed!\n");
- return;
- }
-
- /* Disable PHY */
- keystone_xhci_phy_unset(keystone.phy);
-
-/* memset(&keystone, 0, sizeof(struct keystone_xhci)); */
- debug("xhci_hcd_stop OK.\n");
-}
projects / platform / kernel / u-boot.git / commitdiff