From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from metis.ext.pengutronix.de ([2001:6f8:1178:4:290:27ff:fe1d:cc33]) by canuck.infradead.org with esmtps (Exim 4.72 #1 (Red Hat Linux)) id 1Pfr6t-00040l-CR for barebox@lists.infradead.org; Thu, 20 Jan 2011 09:47:30 +0000 From: Sascha Hauer Date: Thu, 20 Jan 2011 10:46:53 +0100 Message-Id: <1295516821-8988-3-git-send-email-s.hauer@pengutronix.de> In-Reply-To: <1295516821-8988-1-git-send-email-s.hauer@pengutronix.de> References: <1295516821-8988-1-git-send-email-s.hauer@pengutronix.de> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: barebox-bounces@lists.infradead.org Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH 02/10] i.MX23: Add USB (phy) support To: barebox@lists.infradead.org Signed-off-by: Sascha Hauer --- arch/arm/mach-stm/Makefile | 2 +- arch/arm/mach-stm/include/mach/imx23-regs.h | 4 + arch/arm/mach-stm/include/mach/usb.h | 6 ++ arch/arm/mach-stm/usb.c | 92 +++++++++++++++++++++++++++ 4 files changed, 103 insertions(+), 1 deletions(-) create mode 100644 arch/arm/mach-stm/include/mach/usb.h create mode 100644 arch/arm/mach-stm/usb.c diff --git a/arch/arm/mach-stm/Makefile b/arch/arm/mach-stm/Makefile index 0ff8fd1..f70a994 100644 --- a/arch/arm/mach-stm/Makefile +++ b/arch/arm/mach-stm/Makefile @@ -1,4 +1,4 @@ obj-y += imx.o iomux-imx.o reset-imx.o obj-$(CONFIG_DRIVER_VIDEO_STM) += imx_lcd_clk.o -obj-$(CONFIG_ARCH_IMX23) += speed-imx23.o clocksource-imx23.o +obj-$(CONFIG_ARCH_IMX23) += speed-imx23.o clocksource-imx23.o usb.o obj-$(CONFIG_ARCH_IMX28) += speed-imx28.o clocksource-imx28.o diff --git a/arch/arm/mach-stm/include/mach/imx23-regs.h b/arch/arm/mach-stm/include/mach/imx23-regs.h index caac19b..cc8c03e 100644 --- a/arch/arm/mach-stm/include/mach/imx23-regs.h +++ b/arch/arm/mach-stm/include/mach/imx23-regs.h @@ -38,5 +38,9 @@ #define IMX_SSP1_BASE 0x80010000 #define IMX_FB_BASE 0x80030000 #define IMX_SSP2_BASE 0x80034000 +#define IMX_POWER_BASE 0x80044000 +#define IMX_USBPHY_BASE 0x8007c000 +#define IMX_DIGCTL_BASE 0x8001c000 +#define IMX_USB_BASE 0x80080000 #endif /* __ASM_ARCH_MX23_REGS_H */ diff --git a/arch/arm/mach-stm/include/mach/usb.h b/arch/arm/mach-stm/include/mach/usb.h new file mode 100644 index 0000000..af7d885 --- /dev/null +++ b/arch/arm/mach-stm/include/mach/usb.h @@ -0,0 +1,6 @@ +#ifndef __MACH_USB_H +#define __MACH_USB_H + +int imx_usb_phy_enable(void); + +#endif /* __MACH_USB_H */ diff --git a/arch/arm/mach-stm/usb.c b/arch/arm/mach-stm/usb.c new file mode 100644 index 0000000..d232bb6 --- /dev/null +++ b/arch/arm/mach-stm/usb.c @@ -0,0 +1,92 @@ +/* + * i.MX23/28 USBPHY setup + * + * Copyright 2011 Sascha Hauer, Pengutronix + * + * 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 + +#define POWER_CTRL (IMX_POWER_BASE + 0x0) +#define POWER_CTRL_CLKGATE 0x40000000 + +#define POWER_STS (IMX_POWER_BASE + 0xc0) +#define POWER_STS_VBUSVALID 0x00000002 +#define POWER_STS_BVALID 0x00000004 +#define POWER_STS_AVALID 0x00000008 + +#define POWER_DEBUG (IMX_POWER_BASE + 0x110) +#define POWER_DEBUG_BVALIDPIOLOCK 0x00000002 +#define POWER_DEBUG_AVALIDPIOLOCK 0x00000004 +#define POWER_DEBUG_VBUSVALIDPIOLOCK 0x00000008 + +#define USBPHY_PWD (IMX_USBPHY_BASE + 0x0) + +#define USBPHY_CTRL (IMX_USBPHY_BASE + 0x30) +#define USBPHY_CTRL_SFTRST 0x80000000 +#define USBPHY_CTRL_CLKGATE 0x40000000 + +#define CLK_PLLCTRL0 (IMX_CCM_BASE + 0x0) +#define PLLCTRL0_EN_USB_CLKS 0x00040000 + +#define DIGCTRL_CTRL (IMX_DIGCTL_BASE + 0x0) +#define DIGCTL_CTRL_USB_CLKGATE 0x00000004 + +#define SET 0x4 +#define CLR 0x8 + +int imx_usb_phy_enable(void) +{ + u32 reg; + + /* + * Set these bits so that we can force the OTG bits high + * so the ARC core operates properly + */ + writel(POWER_CTRL_CLKGATE, POWER_CTRL + CLR); + + writel(POWER_DEBUG_VBUSVALIDPIOLOCK | + POWER_DEBUG_AVALIDPIOLOCK | + POWER_DEBUG_BVALIDPIOLOCK, POWER_DEBUG + SET); + + reg = readl(POWER_STS); + reg |= POWER_STS_BVALID | POWER_STS_AVALID | POWER_STS_VBUSVALID; + writel(reg, POWER_STS); + + /* Reset USBPHY module */ + writel(USBPHY_CTRL_SFTRST, USBPHY_CTRL + SET); + udelay(10); + + /* Remove CLKGATE and SFTRST */ + writel(USBPHY_CTRL_CLKGATE | USBPHY_CTRL_SFTRST, USBPHY_CTRL + CLR); + + /* Turn on the USB clocks */ + writel(PLLCTRL0_EN_USB_CLKS, CLK_PLLCTRL0 + SET); + writel(DIGCTL_CTRL_USB_CLKGATE, DIGCTRL_CTRL + CLR); + + /* Power up the PHY */ + writel(0, USBPHY_PWD); + + /* + * Set precharge bit to cure overshoot problems at the + * start of packets + */ + writel(1, USBPHY_CTRL + SET); + + return 0; +} + -- 1.7.2.3 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox