diff options
Diffstat (limited to 'drivers/usb/host/ehci-mxs.c')
| -rw-r--r-- | drivers/usb/host/ehci-mxs.c | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/drivers/usb/host/ehci-mxs.c b/drivers/usb/host/ehci-mxs.c new file mode 100644 index 0000000000..c795f23bd7 --- /dev/null +++ b/drivers/usb/host/ehci-mxs.c @@ -0,0 +1,154 @@ +/* + * Freescale i.MX28 USB Host driver + * + * Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com> + * on behalf of DENX Software Engineering GmbH + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include <common.h> +#include <asm/io.h> +#include <asm/arch/regs-common.h> +#include <asm/arch/regs-base.h> +#include <asm/arch/regs-clkctrl.h> +#include <asm/arch/regs-usb.h> +#include <asm/arch/regs-usbphy.h> + +#include "ehci-core.h" +#include "ehci.h" + +#if (CONFIG_EHCI_MXS_PORT != 0) && (CONFIG_EHCI_MXS_PORT != 1) +#error "MXS EHCI: Invalid port selected!" +#endif + +#ifndef CONFIG_EHCI_MXS_PORT +#error "MXS EHCI: Please define correct port using CONFIG_EHCI_MXS_PORT!" +#endif + +static struct ehci_mxs { + struct mx28_usb_regs *usb_regs; + struct mx28_usbphy_regs *phy_regs; +} ehci_mxs; + +int mxs_ehci_get_port(struct ehci_mxs *mxs_usb, int port) +{ + uint32_t usb_base, phy_base; + switch (port) { + case 0: + usb_base = MXS_USBCTRL0_BASE; + phy_base = MXS_USBPHY0_BASE; + break; + case 1: + usb_base = MXS_USBCTRL1_BASE; + phy_base = MXS_USBPHY1_BASE; + break; + default: + printf("CONFIG_EHCI_MXS_PORT (port = %d)\n", port); + return -1; + } + + mxs_usb->usb_regs = (struct mx28_usb_regs *)usb_base; + mxs_usb->phy_regs = (struct mx28_usbphy_regs *)phy_base; + return 0; +} + +/* This DIGCTL register ungates clock to USB */ +#define HW_DIGCTL_CTRL 0x8001c000 +#define HW_DIGCTL_CTRL_USB0_CLKGATE (1 << 2) +#define HW_DIGCTL_CTRL_USB1_CLKGATE (1 << 16) + +int ehci_hcd_init(void) +{ + + int ret; + uint32_t usb_base, cap_base; + struct mx28_register *digctl_ctrl = + (struct mx28_register *)HW_DIGCTL_CTRL; + struct mx28_clkctrl_regs *clkctrl_regs = + (struct mx28_clkctrl_regs *)MXS_CLKCTRL_BASE; + + ret = mxs_ehci_get_port(&ehci_mxs, CONFIG_EHCI_MXS_PORT); + if (ret) + return ret; + + /* Reset the PHY block */ + writel(USBPHY_CTRL_SFTRST, &ehci_mxs.phy_regs->hw_usbphy_ctrl_set); + udelay(10); + writel(USBPHY_CTRL_SFTRST | USBPHY_CTRL_CLKGATE, + &ehci_mxs.phy_regs->hw_usbphy_ctrl_clr); + + /* Enable USB clock */ + writel(CLKCTRL_PLL0CTRL0_EN_USB_CLKS | CLKCTRL_PLL0CTRL0_POWER, + &clkctrl_regs->hw_clkctrl_pll0ctrl0_set); + writel(CLKCTRL_PLL1CTRL0_EN_USB_CLKS | CLKCTRL_PLL1CTRL0_POWER, + &clkctrl_regs->hw_clkctrl_pll1ctrl0_set); + + writel(HW_DIGCTL_CTRL_USB0_CLKGATE | HW_DIGCTL_CTRL_USB1_CLKGATE, + &digctl_ctrl->reg_clr); + + /* Start USB PHY */ + writel(0, &ehci_mxs.phy_regs->hw_usbphy_pwd); + + /* Enable UTMI+ Level 2 and Level 3 compatibility */ + writel(USBPHY_CTRL_ENUTMILEVEL3 | USBPHY_CTRL_ENUTMILEVEL2 | 1, + &ehci_mxs.phy_regs->hw_usbphy_ctrl_set); + + usb_base = ((uint32_t)ehci_mxs.usb_regs) + 0x100; + hccr = (struct ehci_hccr *)usb_base; + + cap_base = ehci_readl(&hccr->cr_capbase); + hcor = (struct ehci_hcor *)(usb_base + HC_LENGTH(cap_base)); + + return 0; +} + +int ehci_hcd_stop(void) +{ + int ret; + uint32_t tmp; + struct mx28_register *digctl_ctrl = + (struct mx28_register *)HW_DIGCTL_CTRL; + struct mx28_clkctrl_regs *clkctrl_regs = + (struct mx28_clkctrl_regs *)MXS_CLKCTRL_BASE; + + ret = mxs_ehci_get_port(&ehci_mxs, CONFIG_EHCI_MXS_PORT); + if (ret) + return ret; + + /* Stop the USB port */ + tmp = ehci_readl(&hcor->or_usbcmd); + tmp &= ~CMD_RUN; + ehci_writel(tmp, &hcor->or_usbcmd); + + /* Disable the PHY */ + tmp = USBPHY_PWD_RXPWDRX | USBPHY_PWD_RXPWDDIFF | + USBPHY_PWD_RXPWD1PT1 | USBPHY_PWD_RXPWDENV | + USBPHY_PWD_TXPWDV2I | USBPHY_PWD_TXPWDIBIAS | + USBPHY_PWD_TXPWDFS; + writel(tmp, &ehci_mxs.phy_regs->hw_usbphy_pwd); + + /* Disable USB clock */ + writel(CLKCTRL_PLL0CTRL0_EN_USB_CLKS, + &clkctrl_regs->hw_clkctrl_pll0ctrl0_clr); + writel(CLKCTRL_PLL1CTRL0_EN_USB_CLKS, + &clkctrl_regs->hw_clkctrl_pll1ctrl0_clr); + + /* Gate off the USB clock */ + writel(HW_DIGCTL_CTRL_USB0_CLKGATE | HW_DIGCTL_CTRL_USB1_CLKGATE, + &digctl_ctrl->reg_set); + + return 0; +} |