[U-Boot] [PATCH v2 4/6] usb : musb : Adding DM6446 (TI DaVinci) platform specific USB support
Thomas Abraham
t-abraham at ti.com
Thu Dec 18 00:10:54 CET 2008
Adding DM6446 (TI DaVinci) platform specific USB functionality for
USB Phy and VBUS initialization.
Signed-off-by: Ravi Babu <ravibabu at ti.com>
Signed-off-by: Swaminathan S <swami.iyer at ti.com>
Signed-off-by: Thomas Abraham <t-abraham at ti.com>
Signed-off-by: Ajay Kumar Gupta <ajay.gupta at ti.com>
---
drivers/usb/Makefile | 1 +
drivers/usb/davinci_usb.c | 139 +++++++++++++++++++++++++++++++++++++++++++++
drivers/usb/davinci_usb.h | 98 +++++++++++++++++++++++++++++++
3 files changed, 238 insertions(+), 0 deletions(-)
create mode 100644 drivers/usb/davinci_usb.c
create mode 100644 drivers/usb/davinci_usb.h
diff --git a/drivers/usb/Makefile b/drivers/usb/Makefile
index 94eea70..3a2706d 100644
--- a/drivers/usb/Makefile
+++ b/drivers/usb/Makefile
@@ -36,6 +36,7 @@ COBJS-$(CONFIG_USB_R8A66597_HCD) += r8a66597-hcd.o
COBJS-$(CONFIG_USB_SL811HS) += sl811_usb.o
COBJS-$(CONFIG_USB_EHCI_FSL) += usb_ehci_fsl.o
COBJS-$(CONFIG_MUSB_HCD) += musb_hcd.o musb_core.o
+COBJS-$(CONFIG_USB_DAVINCI) += davinci_usb.o
# device
ifdef CONFIG_USB_DEVICE
diff --git a/drivers/usb/davinci_usb.c b/drivers/usb/davinci_usb.c
new file mode 100644
index 0000000..9c50606
--- /dev/null
+++ b/drivers/usb/davinci_usb.c
@@ -0,0 +1,139 @@
+/*
+ * TI's Davinci platform specific usb wrapper functions.
+ *
+ * Copyright (c) 2008 Texas Instruments
+ *
+ * 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
+ *
+ * Author: Thomas Abraham t-abraham at ti.com, Texas Instruments
+ */
+
+#include <common.h>
+
+#ifdef CONFIG_USB_DAVINCI
+#include <asm/io.h>
+#include "davinci_usb.h"
+
+/* This function writes to a 32-bit register of platform usb wrapper */
+inline void pusb_writel(u32 offset, u32 value)
+{
+ writel(value, DAVINCI_USB0_BASE + offset);
+}
+
+/* This function reads a 32-bit register of platform usb wrapper */
+inline u32 pusb_readl(u32 offset)
+{
+ return readl(DAVINCI_USB0_BASE + offset);
+}
+
+/* This function writes to a 16-bit register of platform musb core */
+inline void musb_writew(u32 offset, u16 value)
+{
+ writew(value, MENTOR_USB0_BASE + offset);
+}
+
+/* This function writes to a 8-bit register of platform musb core */
+inline void musb_writeb(u32 offset, u8 value)
+{
+ writeb(value, MENTOR_USB0_BASE + offset);
+}
+
+/* This function reads a 16-bit register of platform usb wrapper */
+inline u16 musb_readw(u32 offset)
+{
+ return readw(MENTOR_USB0_BASE + offset);
+}
+
+/* This function reads a 8-bit register of platform usb wrapper */
+inline u8 musb_readb(u32 offset)
+{
+ return readb(MENTOR_USB0_BASE + offset);
+}
+
+/*
+ * Enable the usb phy
+ */
+static u8 phy_on(void)
+{
+ u32 timeout;
+
+ /* Wait until the usb phy is turned on */
+ writel(USBPHY_SESNDEN | USBPHY_VBDTCTEN, USBPHY_CTL_PADDR);
+ timeout = DAVINCI_USB_TIMEOUT;
+ while (timeout--)
+ if (readl(USBPHY_CTL_PADDR) & USBPHY_PHYCLKGD)
+ return 1;
+
+ /* usb phy was not turned on */
+ return 0;
+}
+
+/*
+ * Disable the usb phy
+ */
+static void phy_off(void)
+{
+ /* powerdown the on-chip PHY and its oscillator */
+ writel(USBPHY_OSCPDWN | USBPHY_PHYPDWN, USBPHY_CTL_PADDR);
+}
+
+
+/*
+ * This function performs Davinci platform specific initialization for usb0.
+ */
+int musb_platform_init(void)
+{
+ u32 revision;
+
+ /* enable usb vbus */
+ enable_vbus();
+
+ /* start the on-chip usb phy and its pll */
+ if (!phy_on())
+ return -1;
+
+ /* reset the controller */
+ pusb_writel(DAVINCI_USB_CTRL_REG, 1);
+ udelay(5000);
+
+ /* Returns zero if e.g. not clocked */
+ revision = pusb_readl(DAVINCI_USB_VERSION_REG);
+ if (!revision)
+ return -1;
+
+ /* Disable all interrupts */
+ pusb_writel(DAVINCI_USB_INT_MASK_SET_REG, DAVINCI_USB_USBINT_MASK |
+ DAVINCI_USB_RXINT_MASK | DAVINCI_USB_TXINT_MASK);
+ return 0;
+}
+
+
+/*
+ * This function performs Davinci platform specific deinitialization for usb0.
+ */
+void musb_platform_deinit(void)
+{
+ /* Turn of the phy */
+ phy_off();
+
+ /* flush any interrupts */
+ pusb_writel(DAVINCI_USB_INT_MASK_CLR_REG, DAVINCI_USB_USBINT_MASK |
+ DAVINCI_USB_TXINT_MASK | DAVINCI_USB_RXINT_MASK);
+ pusb_writel(DAVINCI_USB_EOI_REG, 0);
+}
+
+#endif /* CONFIG_USB_DAVINCI */
+
diff --git a/drivers/usb/davinci_usb.h b/drivers/usb/davinci_usb.h
new file mode 100644
index 0000000..c0b618f
--- /dev/null
+++ b/drivers/usb/davinci_usb.h
@@ -0,0 +1,98 @@
+/*
+ * TI's Davinci platform specific usb wrapper functions.
+ *
+ * Copyright (c) 2008 Texas Instruments
+ *
+ * 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
+ *
+ * Author: Thomas Abraham t-abraham at ti.com, Texas Instruments
+ */
+
+#ifndef __DAVINCI_USB_H__
+#define __DAVINCI_USB_H__
+
+#include <asm/arch/hardware.h>
+
+/* Base address of DAVINCI usb0 wrapper */
+#define DAVINCI_USB0_BASE 0x01C64000
+
+/* Base address of DAVINCI musb core */
+#define MENTOR_USB0_BASE (DAVINCI_USB0_BASE+0x400)
+
+/* Include usb OTG module registers here */
+#define DAVINCI_USB_VERSION_REG 0x00
+#define DAVINCI_USB_CTRL_REG 0x04
+#define DAVINCI_USB_STAT_REG 0x08
+#define DAVINCI_MODE_TGCR_REG 0x10
+#define DAVINCI_AUTOREQ_REG 0x14
+#define DAVINCI_SRP_FIXTIME_REG 0x18
+#define DAVINCI_TEARDOWN_REG 0x1C
+#define DAVINCI_USB_INT_SOURCE_REG 0x20
+#define DAVINCI_USB_INT_SET_REG 0x24
+#define DAVINCI_USB_INT_SRC_CLR_REG 0x28
+#define DAVINCI_USB_INT_MASK_REG 0x2c
+#define DAVINCI_USB_INT_MASK_SET_REG 0x30
+#define DAVINCI_USB_INT_MASK_CLR_REG 0x34
+#define DAVINCI_USB_INT_SRC_MASKED_REG 0x38
+#define DAVINCI_USB_EOI_REG 0x3c
+#define DAVINCI_USB_EOI_INTVEC 0x40
+#define DAVINCI_GRNDIS_EP1SIZE_REG 0x50
+#define DAVINCI_GRNDIS_EP2SIZE_REG 0x54
+#define DAVINCI_GRNDIS_EP3SIZE_REG 0x58
+#define DAVINCI_GRNDIS_EP4SIZE_REG 0x5C
+
+#define DAVINCI_USB_TX_ENDPTS_MASK 0x1f /* ep0 + 4 tx */
+#define DAVINCI_USB_RX_ENDPTS_MASK 0x1e /* 4 rx */
+
+#define DAVINCI_USB_USBINT_SHIFT 16
+#define DAVINCI_USB_TXINT_SHIFT 0
+#define DAVINCI_USB_RXINT_SHIFT 8
+
+#define DAVINCI_INTR_DRVVBUS 0x0100
+
+#define DAVINCI_USB_USBINT_MASK 0x01ff0000 /* 8 Mentor, DRVVBUS */
+#define DAVINCI_USB_TXINT_MASK \
+ (DAVINCI_USB_TX_ENDPTS_MASK << DAVINCI_USB_TXINT_SHIFT)
+#define DAVINCI_USB_RXINT_MASK \
+ (DAVINCI_USB_RX_ENDPTS_MASK << DAVINCI_USB_RXINT_SHIFT)
+
+#define MGC_BUSCTL_OFFSET(_bEnd, _bOffset) \
+ (0x80 + (8*(_bEnd)) + (_bOffset))
+
+/* Integrated highspeed/otg PHY */
+#define USBPHY_CTL_PADDR (DAVINCI_SYSTEM_MODULE_BASE + 0x34)
+#define USBPHY_PHYCLKGD (1 << 8)
+#define USBPHY_SESNDEN (1 << 7) /* v(sess_end) comparator */
+#define USBPHY_VBDTCTEN (1 << 6) /* v(bus) comparator */
+#define USBPHY_PHYPLLON (1 << 4) /* override pll suspend */
+#define USBPHY_CLKO1SEL (1 << 3)
+#define USBPHY_OSCPDWN (1 << 2)
+#define USBPHY_PHYPDWN (1 << 0)
+
+/* Timeout for Davinci usb module */
+#define DAVINCI_USB_TIMEOUT 0x3FFFF
+
+/* IO Expander I2C address and VBUS enable mask */
+#define IOEXP_I2C_ADDR 0x3A
+#define IOEXP_VBUSEN_MASK 1
+
+/* extern functions */
+extern void lpsc_on(unsigned int id);
+extern int i2c_write(uchar chip, uint addr, int alen, uchar *buffer, int len);
+extern int i2c_read(uchar chip, uint addr, int alen, uchar *buffer, int len);
+extern void enable_vbus(void);
+#endif /* __DAVINCI_USB_H__ */
+
--
1.5.6
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