This driver adds support for the USB peripheral on Freescale Vybrid SoC's. Signed-off-by: Sanchayan Maity <maitysanchayan@gmail.com>master
Sanchayan Maity
9 years ago
committed by
Tom Rini
parent
e7b860fa4d
commit
a94bb7a42c
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/*
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* Freescale USB PHY Register Definitions |
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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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#ifndef __REGS_USBPHY_H__ |
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#define __REGS_USBPHY_H__ |
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#define USBPHY_CTRL 0x00000030 |
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#define USBPHY_CTRL_SET 0x00000034 |
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#define USBPHY_CTRL_CLR 0x00000038 |
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#define USBPHY_CTRL_TOG 0x0000003C |
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#define USBPHY_PWD 0x00000000 |
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#define USBPHY_TX 0x00000010 |
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#define USBPHY_RX 0x00000020 |
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#define USBPHY_DEBUG 0x00000050 |
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#define USBPHY_CTRL_ENUTMILEVEL2 (1 << 14) |
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#define USBPHY_CTRL_ENUTMILEVEL3 (1 << 15) |
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#define USBPHY_CTRL_OTG_ID (1 << 27) |
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#define USBPHY_CTRL_CLKGATE (1 << 30) |
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#define USBPHY_CTRL_SFTRST (1 << 31) |
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#endif /* __REGS_USBPHY_H__ */ |
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@ -0,0 +1,164 @@ |
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/*
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* Copyright (c) 2015 Sanchayan Maity <sanchayan.maity@toradex.com> |
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* Copyright (C) 2015 Toradex AG |
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* |
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* Based on ehci-mx6 driver |
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* |
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* SPDX-License-Identifier: GPL-2.0+ |
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*/ |
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#include <common.h> |
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#include <usb.h> |
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#include <errno.h> |
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#include <linux/compiler.h> |
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#include <asm/io.h> |
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#include <asm/arch/clock.h> |
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#include <asm/arch/imx-regs.h> |
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#include <asm/arch/crm_regs.h> |
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#include <asm/imx-common/iomux-v3.h> |
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#include <asm/imx-common/regs-usbphy.h> |
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#include <usb/ehci-fsl.h> |
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#include "ehci.h" |
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#define USB_NC_REG_OFFSET 0x00000800 |
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#define ANADIG_PLL_CTRL_EN_USB_CLKS (1 << 6) |
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#define UCTRL_OVER_CUR_POL (1 << 8) /* OTG Polarity of Overcurrent */ |
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#define UCTRL_OVER_CUR_DIS (1 << 7) /* Disable OTG Overcurrent Detection */ |
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/* USBCMD */ |
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#define UCMD_RUN_STOP (1 << 0) /* controller run/stop */ |
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#define UCMD_RESET (1 << 1) /* controller reset */ |
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static const unsigned phy_bases[] = { |
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USB_PHY0_BASE_ADDR, |
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USB_PHY1_BASE_ADDR, |
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}; |
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static const unsigned nc_reg_bases[] = { |
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USBC0_BASE_ADDR, |
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USBC1_BASE_ADDR, |
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}; |
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static void usb_internal_phy_clock_gate(int index) |
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{ |
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void __iomem *phy_reg; |
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phy_reg = (void __iomem *)phy_bases[index]; |
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clrbits_le32(phy_reg + USBPHY_CTRL, USBPHY_CTRL_CLKGATE); |
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} |
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static void usb_power_config(int index) |
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{ |
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struct anadig_reg __iomem *anadig = |
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(struct anadig_reg __iomem *)ANADIG_BASE_ADDR; |
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void __iomem *pll_ctrl; |
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switch (index) { |
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case 0: |
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pll_ctrl = &anadig->pll3_ctrl; |
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clrbits_le32(pll_ctrl, ANADIG_PLL3_CTRL_BYPASS); |
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setbits_le32(pll_ctrl, ANADIG_PLL3_CTRL_ENABLE |
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| ANADIG_PLL3_CTRL_POWERDOWN |
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| ANADIG_PLL_CTRL_EN_USB_CLKS); |
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break; |
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case 1: |
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pll_ctrl = &anadig->pll7_ctrl; |
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clrbits_le32(pll_ctrl, ANADIG_PLL7_CTRL_BYPASS); |
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setbits_le32(pll_ctrl, ANADIG_PLL7_CTRL_ENABLE |
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| ANADIG_PLL7_CTRL_POWERDOWN |
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| ANADIG_PLL_CTRL_EN_USB_CLKS); |
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break; |
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default: |
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return; |
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} |
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} |
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static void usb_phy_enable(int index, struct usb_ehci *ehci) |
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{ |
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void __iomem *phy_reg; |
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void __iomem *phy_ctrl; |
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void __iomem *usb_cmd; |
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phy_reg = (void __iomem *)phy_bases[index]; |
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phy_ctrl = (void __iomem *)(phy_reg + USBPHY_CTRL); |
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usb_cmd = (void __iomem *)&ehci->usbcmd; |
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/* Stop then Reset */ |
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clrbits_le32(usb_cmd, UCMD_RUN_STOP); |
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while (readl(usb_cmd) & UCMD_RUN_STOP) |
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; |
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setbits_le32(usb_cmd, UCMD_RESET); |
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while (readl(usb_cmd) & UCMD_RESET) |
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; |
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/* Reset USBPHY module */ |
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setbits_le32(phy_ctrl, USBPHY_CTRL_SFTRST); |
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udelay(10); |
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/* Remove CLKGATE and SFTRST */ |
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clrbits_le32(phy_ctrl, USBPHY_CTRL_CLKGATE | USBPHY_CTRL_SFTRST); |
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udelay(10); |
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/* Power up the PHY */ |
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writel(0, phy_reg + USBPHY_PWD); |
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/* Enable FS/LS device */ |
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setbits_le32(phy_ctrl, USBPHY_CTRL_ENUTMILEVEL2 | |
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USBPHY_CTRL_ENUTMILEVEL3); |
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} |
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static void usb_oc_config(int index) |
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{ |
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void __iomem *ctrl; |
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ctrl = (void __iomem *)(nc_reg_bases[index] + USB_NC_REG_OFFSET); |
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setbits_le32(ctrl, UCTRL_OVER_CUR_POL); |
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setbits_le32(ctrl, UCTRL_OVER_CUR_DIS); |
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} |
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int ehci_hcd_init(int index, enum usb_init_type init, |
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struct ehci_hccr **hccr, struct ehci_hcor **hcor) |
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{ |
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struct usb_ehci *ehci; |
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if (index >= ARRAY_SIZE(nc_reg_bases)) |
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return -EINVAL; |
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if (init == USB_INIT_DEVICE && index == 1) |
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return -ENODEV; |
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if (init == USB_INIT_HOST && index == 0) |
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return -ENODEV; |
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ehci = (struct usb_ehci *)nc_reg_bases[index]; |
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usb_power_config(index); |
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usb_oc_config(index); |
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usb_internal_phy_clock_gate(index); |
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usb_phy_enable(index, ehci); |
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*hccr = (struct ehci_hccr *)((uint32_t)&ehci->caplength); |
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*hcor = (struct ehci_hcor *)((uint32_t)*hccr + |
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HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase))); |
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if (init == USB_INIT_DEVICE) { |
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setbits_le32(&ehci->usbmode, CM_DEVICE); |
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writel((PORT_PTS_UTMI | PORT_PTS_PTW), &ehci->portsc); |
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setbits_le32(&ehci->portsc, USB_EN); |
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} else if (init == USB_INIT_HOST) { |
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setbits_le32(&ehci->usbmode, CM_HOST); |
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writel((PORT_PTS_UTMI | PORT_PTS_PTW), &ehci->portsc); |
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setbits_le32(&ehci->portsc, USB_EN); |
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} |
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return 0; |
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} |
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int ehci_hcd_stop(int index) |
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{ |
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return 0; |
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} |
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