[PATCH 2/2] ARM i.MX28 usb: Add USBPHY support
Sascha Hauer
s.hauer at pengutronix.de
Thu Jun 28 07:46:37 EDT 2012
Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
---
arch/arm/mach-mxs/Makefile | 2 +-
arch/arm/mach-mxs/include/mach/imx28-regs.h | 5 ++
arch/arm/mach-mxs/include/mach/usb.h | 3 +
arch/arm/mach-mxs/usb-imx28.c | 101 +++++++++++++++++++++++++++
4 files changed, 110 insertions(+), 1 deletion(-)
create mode 100644 arch/arm/mach-mxs/usb-imx28.c
diff --git a/arch/arm/mach-mxs/Makefile b/arch/arm/mach-mxs/Makefile
index 1ba00f1..e8de370 100644
--- a/arch/arm/mach-mxs/Makefile
+++ b/arch/arm/mach-mxs/Makefile
@@ -1,5 +1,5 @@
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 usb-imx23.o
-obj-$(CONFIG_ARCH_IMX28) += speed-imx28.o clocksource-imx28.o
+obj-$(CONFIG_ARCH_IMX28) += speed-imx28.o clocksource-imx28.o usb-imx28.o
obj-$(CONFIG_MXS_OCOTP) += ocotp.o
diff --git a/arch/arm/mach-mxs/include/mach/imx28-regs.h b/arch/arm/mach-mxs/include/mach/imx28-regs.h
index 9a2052c..900990a 100644
--- a/arch/arm/mach-mxs/include/mach/imx28-regs.h
+++ b/arch/arm/mach-mxs/include/mach/imx28-regs.h
@@ -29,9 +29,11 @@
#define IMX_SSP2_BASE 0x80014000
#define IMX_SSP3_BASE 0x80016000
#define IMX_IOMUXC_BASE 0x80018000
+#define IMX_DIGCTL_BASE 0x8001c000
#define IMX_OCOTP_BASE 0x8002c000
#define IMX_FB_BASE 0x80030000
#define IMX_CCM_BASE 0x80040000
+#define IMX_POWER_BASE 0x80044000
#define IMX_WDT_BASE 0x80056000
#define IMX_I2C0_BASE 0x80058000
#define IMX_I2C1_BASE 0x8005a000
@@ -42,6 +44,9 @@
#define IMX_UART3_BASE 0x80070000
#define IMX_UART4_BASE 0x80072000
#define IMX_DBGUART_BASE 0x80074000
+#define IMX_USBPHY0_BASE 0x8007c000
+#define IMX_USBPHY1_BASE 0x8007e000
+#define IMX_USB_BASE 0x80080000
#define IMX_FEC0_BASE 0x800F0000
#define IMX_FEC1_BASE 0x800F4000
diff --git a/arch/arm/mach-mxs/include/mach/usb.h b/arch/arm/mach-mxs/include/mach/usb.h
index b238499..2d31b0d 100644
--- a/arch/arm/mach-mxs/include/mach/usb.h
+++ b/arch/arm/mach-mxs/include/mach/usb.h
@@ -3,4 +3,7 @@
int imx23_usb_phy_enable(void);
+int imx28_usb_phy0_enable(void);
+int imx28_usb_phy1_enable(void);
+
#endif /* __MACH_USB_H */
diff --git a/arch/arm/mach-mxs/usb-imx28.c b/arch/arm/mach-mxs/usb-imx28.c
new file mode 100644
index 0000000..61d59c3
--- /dev/null
+++ b/arch/arm/mach-mxs/usb-imx28.c
@@ -0,0 +1,101 @@
+/*
+ * i.MX28 USBPHY setup
+ *
+ * Copyright 2011 Sascha Hauer, Pengutronix <s.hauer at pengutronix.de>
+ *
+ * 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 <io.h>
+#include <errno.h>
+#include <mach/imx-regs.h>
+
+#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 0x0
+
+#define USBPHY_CTRL 0x30
+#define USBPHY_CTRL_SFTRST (1 << 31)
+#define USBPHY_CTRL_CLKGATE (1 << 30)
+#define USBPHY_CTRL_ENUTMILEVEL3 (1 << 15)
+#define USBPHY_CTRL_ENUTMILEVEL2 (1 << 14)
+
+#define CLK_PLL0CTRL0 (IMX_CCM_BASE + 0x0)
+#define CLK_PLL1CTRL0 (IMX_CCM_BASE + 0x20)
+#define PLLCTRL0_EN_USB_CLKS (1 << 18)
+
+#define DIGCTRL_CTRL (IMX_DIGCTL_BASE + 0x0)
+#define DIGCTL_CTRL_USB0_CLKGATE (1 << 2)
+#define DIGCTL_CTRL_USB1_CLKGATE (1 << 16)
+
+#define SET 0x4
+#define CLR 0x8
+
+static void imx28_usb_phy_reset(void __iomem *phybase)
+{
+ /* Reset USBPHY module */
+ writel(USBPHY_CTRL_SFTRST, phybase + USBPHY_CTRL + SET);
+ udelay(10);
+ writel(USBPHY_CTRL_CLKGATE | USBPHY_CTRL_SFTRST,
+ phybase + USBPHY_CTRL + CLR);
+}
+
+static void imx28_usb_phy_enable(void __iomem *phybase)
+{
+ /* Power up the PHY */
+ writel(0, phybase + USBPHY_PWD);
+
+ writel(USBPHY_CTRL_ENUTMILEVEL3 | USBPHY_CTRL_ENUTMILEVEL2 | 1,
+ phybase + USBPHY_CTRL + SET);
+}
+
+int imx28_usb_phy0_enable(void)
+{
+ imx28_usb_phy_reset((void *)IMX_USBPHY0_BASE);
+
+ /* Turn on the USB clocks */
+ writel(PLLCTRL0_EN_USB_CLKS, CLK_PLL0CTRL0 + SET);
+
+ writel(DIGCTL_CTRL_USB0_CLKGATE, DIGCTRL_CTRL + CLR);
+
+ imx28_usb_phy_enable((void *)IMX_USBPHY0_BASE);
+
+ return 0;
+}
+
+int imx28_usb_phy1_enable(void)
+{
+ imx28_usb_phy_reset((void *)IMX_USBPHY1_BASE);
+
+ /* Turn on the USB clocks */
+ writel(PLLCTRL0_EN_USB_CLKS, CLK_PLL1CTRL0 + SET);
+
+ writel(DIGCTL_CTRL_USB1_CLKGATE, DIGCTRL_CTRL + CLR);
+
+ imx28_usb_phy_enable((void *)IMX_USBPHY1_BASE);
+
+ return 0;
+}
--
1.7.10
More information about the barebox
mailing list