+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0+
-/*
- * OMAP USB PHY Support
- *
- * (C) Copyright 2013
- * Texas Instruments, <www.ti.com>
- *
- * Author: Dan Murphy <dmurphy@ti.com>
- */
-
-#include <common.h>
-#include <usb.h>
-#include <dm/device_compat.h>
-#include <linux/delay.h>
-#include <linux/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 <usb/xhci.h>
-
-#ifdef CONFIG_OMAP_USB3PHY1_HOST
-struct usb3_dpll_params {
- u16 m;
- u8 n;
- u8 freq:3;
- u8 sd;
- u32 mf;
-};
-
-struct usb3_dpll_map {
- unsigned long rate;
- struct usb3_dpll_params params;
- struct usb3_dpll_map *dpll_map;
-};
-
-static struct usb3_dpll_map dpll_map_usb[] = {
- {12000000, {1250, 5, 4, 20, 0} }, /* 12 MHz */
- {16800000, {3125, 20, 4, 20, 0} }, /* 16.8 MHz */
- {19200000, {1172, 8, 4, 20, 65537} }, /* 19.2 MHz */
- {20000000, {1000, 7, 4, 10, 0} }, /* 20 MHz */
- {26000000, {1250, 12, 4, 20, 0} }, /* 26 MHz */
- {38400000, {3125, 47, 4, 20, 92843} }, /* 38.4 MHz */
- { }, /* Terminator */
-};
-
-static struct usb3_dpll_params *omap_usb3_get_dpll_params(void)
-{
- unsigned long rate;
- struct usb3_dpll_map *dpll_map = dpll_map_usb;
-
- rate = get_sys_clk_freq();
-
- for (; dpll_map->rate; dpll_map++) {
- if (rate == dpll_map->rate)
- return &dpll_map->params;
- }
-
- dev_err(phy->dev, "No DPLL configuration for %lu Hz SYS CLK\n", rate);
-
- return NULL;
-}
-
-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)
-{
- struct usb3_dpll_params *dpll_params;
- u32 val;
-
- dpll_params = omap_usb3_get_dpll_params();
- if (!dpll_params)
- return;
-
- val = readl(&phy_regs->pll_config_1);
- val &= ~PLL_REGN_MASK;
- val |= dpll_params->n << PLL_REGN_SHIFT;
- writel(val, &phy_regs->pll_config_1);
-
- val = readl(&phy_regs->pll_config_2);
- val &= ~PLL_SELFREQDCO_MASK;
- val |= dpll_params->freq << PLL_SELFREQDCO_SHIFT;
- writel(val, &phy_regs->pll_config_2);
-
- val = readl(&phy_regs->pll_config_1);
- val &= ~PLL_REGM_MASK;
- val |= dpll_params->m << PLL_REGM_SHIFT;
- writel(val, &phy_regs->pll_config_1);
-
- val = readl(&phy_regs->pll_config_4);
- val &= ~PLL_REGM_F_MASK;
- val |= dpll_params->mf << PLL_REGM_F_SHIFT;
- writel(val, &phy_regs->pll_config_4);
-
- val = readl(&phy_regs->pll_config_3);
- val &= ~PLL_SD_MASK;
- val |= dpll_params->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);
-}
-
-static void omap_enable_usb3_phy(struct omap_xhci *omap)
-{
- u32 val;
-
- 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);
-};
-#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)
-{
- u32 val;
-
- /* USB1_CTRL */
- val = readl(USB1_CTRL);
- if (on) {
- /*
- * these bits are re-used on AM437x to power up/down the USB
- * CM and OTG PHYs, if we don't toggle them, USB will not be
- * functional on newer silicon revisions
- */
- val &= ~(USB1_CTRL_CM_PWRDN | USB1_CTRL_OTG_PWRDN);
- } else {
- val |= USB1_CTRL_CM_PWRDN | USB1_CTRL_OTG_PWRDN;
- }
-
- writel(val, USB1_CTRL);
-}
-#endif /* CONFIG_AM437X_USB2PHY2_HOST */
-
-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
-}
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