From patchwork Mon Oct 24 11:21:35 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marek Vasut X-Patchwork-Id: 121326 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from theia.denx.de (theia.denx.de [85.214.87.163]) by ozlabs.org (Postfix) with ESMTP id D9A1D1007D1 for ; Mon, 24 Oct 2011 22:22:17 +1100 (EST) Received: from localhost (localhost [127.0.0.1]) by theia.denx.de (Postfix) with ESMTP id 13A1028A86; Mon, 24 Oct 2011 13:22:09 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at theia.denx.de Received: from theia.denx.de ([127.0.0.1]) by localhost (theia.denx.de [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id hWTeDSJ5LKN2; Mon, 24 Oct 2011 13:22:08 +0200 (CEST) Received: from theia.denx.de (localhost [127.0.0.1]) by theia.denx.de (Postfix) with ESMTP id C7E0028E65; Mon, 24 Oct 2011 13:21:57 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by theia.denx.de (Postfix) with ESMTP id 1296628A86 for ; Mon, 24 Oct 2011 13:21:55 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at theia.denx.de Received: from theia.denx.de ([127.0.0.1]) by localhost (theia.denx.de [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id YmqUaiy0xxsi for ; Mon, 24 Oct 2011 13:21:54 +0200 (CEST) X-policyd-weight: NOT_IN_SBL_XBL_SPAMHAUS=-1.5 NOT_IN_SPAMCOP=-1.5 NOT_IN_BL_NJABL=-1.5 (only DNSBL check requested) Received: from mail-bw0-f44.google.com (mail-bw0-f44.google.com [209.85.214.44]) by theia.denx.de (Postfix) with ESMTPS id 3435B28194 for ; Mon, 24 Oct 2011 13:21:48 +0200 (CEST) Received: by bkas6 with SMTP id s6so7395528bka.3 for ; Mon, 24 Oct 2011 04:21:48 -0700 (PDT) Received: by 10.204.140.73 with SMTP id h9mr16546326bku.30.1319455307966; Mon, 24 Oct 2011 04:21:47 -0700 (PDT) Received: from localhost.localdomain ([85.13.70.252]) by mx.google.com with ESMTPS id k6sm23323463bkv.8.2011.10.24.04.21.47 (version=SSLv3 cipher=OTHER); Mon, 24 Oct 2011 04:21:47 -0700 (PDT) From: Marek Vasut To: u-boot@lists.denx.de Date: Mon, 24 Oct 2011 13:21:35 +0200 Message-Id: <1319455296-15996-3-git-send-email-marek.vasut@gmail.com> X-Mailer: git-send-email 1.7.6.3 In-Reply-To: <1319455296-15996-1-git-send-email-marek.vasut@gmail.com> References: <1319455296-15996-1-git-send-email-marek.vasut@gmail.com> Subject: [U-Boot] [PATCH 2/3] iMX28: Add USB HOST driver X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.9 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: u-boot-bounces@lists.denx.de Errors-To: u-boot-bounces@lists.denx.de This driver supports both EHCI ports on the i.MX28 CPU. Signed-off-by: Marek Vasut Cc: Stefano Babic Cc: Wolfgang Denk Cc: Detlev Zundel Cc: Remy Bohmer --- drivers/usb/host/Makefile | 1 + drivers/usb/host/ehci-mxs.c | 154 +++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 155 insertions(+), 0 deletions(-) create mode 100644 drivers/usb/host/ehci-mxs.c diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile index 51b2494..09abb75 100644 --- a/drivers/usb/host/Makefile +++ b/drivers/usb/host/Makefile @@ -41,6 +41,7 @@ else COBJS-$(CONFIG_USB_EHCI_FSL) += ehci-fsl.o endif COBJS-$(CONFIG_USB_EHCI_MXC) += ehci-mxc.o +COBJS-$(CONFIG_USB_EHCI_MXS) += ehci-mxs.o COBJS-$(CONFIG_USB_EHCI_PPC4XX) += ehci-ppc4xx.o COBJS-$(CONFIG_USB_EHCI_IXP4XX) += ehci-ixp.o COBJS-$(CONFIG_USB_EHCI_KIRKWOOD) += ehci-kirkwood.o diff --git a/drivers/usb/host/ehci-mxs.c b/drivers/usb/host/ehci-mxs.c new file mode 100644 index 0000000..c795f23 --- /dev/null +++ b/drivers/usb/host/ehci-mxs.c @@ -0,0 +1,154 @@ +/* + * Freescale i.MX28 USB Host driver + * + * Copyright (C) 2011 Marek Vasut + * 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 +#include +#include +#include +#include +#include +#include + +#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; +}