--- /dev/null
+/*
+ * OMAP USB PHY Support
+ *
+ * (C) Copyright 2013
+ * Texas Instruments, <www.ti.com>
+ *
+ * Author: Dan Murphy <dmurphy@ti.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <usb.h>
+#include <asm-generic/errno.h>
+#include <asm/omap_common.h>
+#include <asm/arch/cpu.h>
+#include <asm/arch/sys_proto.h>
+
+#include <linux/compat.h>
+#include <linux/usb/dwc3.h>
+#include <linux/usb/xhci-omap.h>
+
+#include "../host/xhci.h"
+
+#ifdef CONFIG_OMAP_USB3PHY1_HOST
+struct usb_dpll_params {
+ u16 m;
+ u8 n;
+ u8 freq:3;
+ u8 sd;
+ u32 mf;
+};
+
+#define NUM_USB_CLKS 6
+
+static struct usb_dpll_params omap_usb3_dpll_params[NUM_USB_CLKS] = {
+ {1250, 5, 4, 20, 0}, /* 12 MHz */
+ {3125, 20, 4, 20, 0}, /* 16.8 MHz */
+ {1172, 8, 4, 20, 65537}, /* 19.2 MHz */
+ {1250, 12, 4, 20, 0}, /* 26 MHz */
+ {3125, 47, 4, 20, 92843}, /* 38.4 MHz */
+ {1000, 7, 4, 10, 0}, /* 20 MHz */
+};
+
+static void omap_usb_dpll_relock(struct omap_usb3_phy *phy_regs)
+{
+ u32 val;
+
+ writel(SET_PLL_GO, &phy_regs->pll_go);
+ do {
+ val = readl(&phy_regs->pll_status);
+ if (val & PLL_LOCK)
+ break;
+ } while (1);
+}
+
+static void omap_usb_dpll_lock(struct omap_usb3_phy *phy_regs)
+{
+ u32 clk_index = get_sys_clk_index();
+ u32 val;
+
+ val = readl(&phy_regs->pll_config_1);
+ val &= ~PLL_REGN_MASK;
+ val |= omap_usb3_dpll_params[clk_index].n << PLL_REGN_SHIFT;
+ writel(val, &phy_regs->pll_config_1);
+
+ val = readl(&phy_regs->pll_config_2);
+ val &= ~PLL_SELFREQDCO_MASK;
+ val |= omap_usb3_dpll_params[clk_index].freq << PLL_SELFREQDCO_SHIFT;
+ writel(val, &phy_regs->pll_config_2);
+
+ val = readl(&phy_regs->pll_config_1);
+ val &= ~PLL_REGM_MASK;
+ val |= omap_usb3_dpll_params[clk_index].m << PLL_REGM_SHIFT;
+ writel(val, &phy_regs->pll_config_1);
+
+ val = readl(&phy_regs->pll_config_4);
+ val &= ~PLL_REGM_F_MASK;
+ val |= omap_usb3_dpll_params[clk_index].mf << PLL_REGM_F_SHIFT;
+ writel(val, &phy_regs->pll_config_4);
+
+ val = readl(&phy_regs->pll_config_3);
+ val &= ~PLL_SD_MASK;
+ val |= omap_usb3_dpll_params[clk_index].sd << PLL_SD_SHIFT;
+ writel(val, &phy_regs->pll_config_3);
+
+ omap_usb_dpll_relock(phy_regs);
+}
+
+static void usb3_phy_partial_powerup(struct omap_usb3_phy *phy_regs)
+{
+ u32 rate = get_sys_clk_freq()/1000000;
+ u32 val;
+
+ val = readl((*ctrl)->control_phy_power_usb);
+ val &= ~(USB3_PWRCTL_CLK_CMD_MASK | USB3_PWRCTL_CLK_FREQ_MASK);
+ val |= (USB3_PHY_PARTIAL_RX_POWERON | USB3_PHY_TX_RX_POWERON);
+ val |= rate << USB3_PWRCTL_CLK_FREQ_SHIFT;
+
+ writel(val, (*ctrl)->control_phy_power_usb);
+}
+
+void usb_phy_power(int on)
+{
+ u32 val;
+
+ val = readl((*ctrl)->control_phy_power_usb);
+ if (on) {
+ val &= ~USB3_PWRCTL_CLK_CMD_MASK;
+ val |= USB3_PHY_TX_RX_POWERON;
+ } else {
+ val &= (~USB3_PWRCTL_CLK_CMD_MASK & ~USB3_PHY_TX_RX_POWERON);
+ }
+
+ writel(val, (*ctrl)->control_phy_power_usb);
+}
+
+void omap_usb3_phy_init(struct omap_usb3_phy *phy_regs)
+{
+ omap_usb_dpll_lock(phy_regs);
+
+ usb3_phy_partial_powerup(phy_regs);
+ /*
+ * Give enough time for the PHY to partially power-up before
+ * powering it up completely. delay value suggested by the HW
+ * team.
+ */
+ mdelay(100);
+ usb3_phy_power(1);
+}
+
+static void omap_enable_usb3_phy(struct omap_xhci *omap)
+{
+ u32 val;
+
+ /* Setting OCP2SCP1 register */
+ setbits_le32((*prcm)->cm_l3init_ocp2scp1_clkctrl,
+ OCP2SCP1_CLKCTRL_MODULEMODE_HW);
+
+ /* Turn on 32K AON clk */
+ setbits_le32((*prcm)->cm_coreaon_usb_phy_core_clkctrl,
+ USBPHY_CORE_CLKCTRL_OPTFCLKEN_CLK32K);
+
+ /* Setting CM_L3INIT_CLKSTCTRL to 0x0 i.e NO sleep */
+ writel(0x0, (*prcm)->cm_l3init_clkstctrl);
+
+ val = (USBOTGSS_DMADISABLE |
+ USBOTGSS_STANDBYMODE_SMRT_WKUP |
+ USBOTGSS_IDLEMODE_NOIDLE);
+ writel(val, &omap->otg_wrapper->sysconfig);
+
+ /* Clear the utmi OTG status */
+ val = readl(&omap->otg_wrapper->utmi_otg_status);
+ writel(val, &omap->otg_wrapper->utmi_otg_status);
+
+ /* Enable interrupts */
+ writel(USBOTGSS_COREIRQ_EN, &omap->otg_wrapper->irqenable_set_0);
+ val = (USBOTGSS_IRQ_SET_1_IDPULLUP_FALL_EN |
+ USBOTGSS_IRQ_SET_1_DISCHRGVBUS_FALL_EN |
+ USBOTGSS_IRQ_SET_1_CHRGVBUS_FALL_EN |
+ USBOTGSS_IRQ_SET_1_DRVVBUS_FALL_EN |
+ USBOTGSS_IRQ_SET_1_IDPULLUP_RISE_EN |
+ USBOTGSS_IRQ_SET_1_DISCHRGVBUS_RISE_EN |
+ USBOTGSS_IRQ_SET_1_CHRGVBUS_RISE_EN |
+ USBOTGSS_IRQ_SET_1_DRVVBUS_RISE_EN |
+ USBOTGSS_IRQ_SET_1_OEVT_EN);
+ writel(val, &omap->otg_wrapper->irqenable_set_1);
+
+ /* Clear the IRQ status */
+ val = readl(&omap->otg_wrapper->irqstatus_1);
+ writel(val, &omap->otg_wrapper->irqstatus_1);
+ val = readl(&omap->otg_wrapper->irqstatus_0);
+ writel(val, &omap->otg_wrapper->irqstatus_0);
+
+ /* Enable the USB OTG Super speed clocks */
+ val = (OPTFCLKEN_REFCLK960M | OTG_SS_CLKCTRL_MODULEMODE_HW);
+ setbits_le32((*prcm)->cm_l3init_usb_otg_ss_clkctrl, val);
+
+};
+#endif /* CONFIG_OMAP_USB3PHY1_HOST */
+
+#ifdef CONFIG_OMAP_USB2PHY2_HOST
+static void omap_enable_usb2_phy2(struct omap_xhci *omap)
+{
+ u32 reg, val;
+
+ val = (~USB2PHY_AUTORESUME_EN & USB2PHY_DISCHGDET);
+ writel(val, (*ctrl)->control_srcomp_north_side);
+
+ setbits_le32((*prcm)->cm_coreaon_usb_phy2_core_clkctrl,
+ USBPHY_CORE_CLKCTRL_OPTFCLKEN_CLK32K);
+
+ setbits_le32((*prcm)->cm_l3init_hsusbhost_clkctrl,
+ (USBPHY_CORE_CLKCTRL_OPTFCLKEN_CLK32K |
+ OTG_SS_CLKCTRL_MODULEMODE_HW));
+
+ /* This is an undocumented Reserved register */
+ reg = 0x4a0086c0;
+ val = readl(reg);
+ val |= 0x100;
+ setbits_le32(reg, val);
+}
+
+void usb_phy_power(int on)
+{
+ return;
+}
+#endif /* CONFIG_OMAP_USB2PHY2_HOST */
+
+#ifdef CONFIG_AM437X_USB2PHY2_HOST
+static void am437x_enable_usb2_phy2(struct omap_xhci *omap)
+{
+ const u32 usb_otg_ss_clk_val = (USBOTGSSX_CLKCTRL_MODULE_EN |
+ USBOTGSSX_CLKCTRL_OPTFCLKEN_REFCLK960);
+
+ writel(usb_otg_ss_clk_val, PRM_PER_USB_OTG_SS0_CLKCTRL);
+ writel(usb_otg_ss_clk_val, PRM_PER_USB_OTG_SS1_CLKCTRL);
+
+ writel(USBPHYOCPSCP_MODULE_EN, PRM_PER_USBPHYOCP2SCP0_CLKCTRL);
+ writel(USBPHYOCPSCP_MODULE_EN, PRM_PER_USBPHYOCP2SCP1_CLKCTRL);
+}
+
+void usb_phy_power(int on)
+{
+ return;
+}
+#endif /* CONFIG_AM437X_USB2PHY2_HOST */
+
+void omap_reset_usb_phy(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(100);
+
+ /* 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);
+
+}
+
+void omap_enable_phy(struct omap_xhci *omap)
+{
+#ifdef CONFIG_OMAP_USB2PHY2_HOST
+ omap_enable_usb2_phy2(omap);
+#endif
+
+#ifdef CONFIG_AM437X_USB2PHY2_HOST
+ am437x_enable_usb2_phy2(omap);
+#endif
+
+#ifdef CONFIG_OMAP_USB3PHY1_HOST
+ omap_enable_usb3_phy(omap);
+ omap_usb3_phy_init(omap->usb3_phy);
+#endif
+}
Code Review / kvmfornfv.git / blobdiff