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usb : musb : Adding DM6446 (TI DaVinci) platform specific USB support
Adding DM6446 (TI DaVinci) platform specific USB functionality for USB Phy and VBUS initialization. Signed-off-by: Ravi Babu <ravibabu@ti.com> Signed-off-by: Swaminathan S <swami.iyer@ti.com> Signed-off-by: Thomas Abraham <t-abraham@ti.com> Signed-off-by: Ajay Kumar Gupta <ajay.gupta@ti.com> Signed-off-by: Remy Bohmer <linux@bohmer.net>
This commit is contained in:
Thomas Abraham
Remy Bohmer
parent
a9d39ebe91
commit
e142e9f35f
3 changed files with 194 additions and 0 deletions
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@ -38,6 +38,7 @@ COBJS-$(CONFIG_USB_EHCI_FSL) += usb_ehci_fsl.o
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COBJS-$(CONFIG_USB_EHCI_PCI) += usb_ehci_pci.o
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COBJS-$(CONFIG_USB_EHCI_IXP4XX) += usb_ehci_ixp.o
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COBJS-$(CONFIG_MUSB_HCD) += musb_hcd.o musb_core.o
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COBJS-$(CONFIG_USB_DAVINCI) += davinci_usb.o
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# device
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ifdef CONFIG_USB_DEVICE
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106
drivers/usb/davinci_usb.c
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106
drivers/usb/davinci_usb.c
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@ -0,0 +1,106 @@
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/*
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* TI's Davinci platform specific USB wrapper functions.
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*
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* Copyright (c) 2008 Texas Instruments
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*
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* Author: Thomas Abraham t-abraham@ti.com, Texas Instruments
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*/
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#include <common.h>
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#include <asm/io.h>
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#include "davinci_usb.h"
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/* MUSB platform configuration */
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struct musb_config musb_cfg = {
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(struct musb_regs *)MENTOR_USB0_BASE,
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DAVINCI_USB_TIMEOUT,
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0
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};
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/* MUSB module register overlay */
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struct davinci_usb_regs *dregs;
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/*
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* Enable the USB phy
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*/
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static u8 phy_on(void)
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{
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u32 timeout;
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/* Wait until the USB phy is turned on */
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writel(USBPHY_SESNDEN | USBPHY_VBDTCTEN, USBPHY_CTL_PADDR);
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timeout = musb_cfg.timeout;
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while (timeout--)
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if (readl(USBPHY_CTL_PADDR) & USBPHY_PHYCLKGD)
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return 1;
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/* USB phy was not turned on */
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return 0;
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}
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/*
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* Disable the USB phy
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*/
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static void phy_off(void)
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{
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/* powerdown the on-chip PHY and its oscillator */
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writel(USBPHY_OSCPDWN | USBPHY_PHYPDWN, USBPHY_CTL_PADDR);
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}
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/*
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* This function performs Davinci platform specific initialization for usb0.
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*/
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int musb_platform_init(void)
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{
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u32 revision;
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/* enable USB VBUS */
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enable_vbus();
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/* start the on-chip USB phy and its pll */
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if (!phy_on())
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return -1;
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/* reset the controller */
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dregs = (struct davinci_usb_regs *)DAVINCI_USB0_BASE;
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writel(1, &dregs->ctrlr);
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udelay(5000);
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/* Returns zero if e.g. not clocked */
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revision = readl(&dregs->version);
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if (!revision)
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return -1;
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/* Disable all interrupts */
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writel(DAVINCI_USB_USBINT_MASK | DAVINCI_USB_RXINT_MASK |
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DAVINCI_USB_TXINT_MASK , &dregs->intmsksetr);
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return 0;
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}
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/*
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* This function performs Davinci platform specific deinitialization for usb0.
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*/
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void musb_platform_deinit(void)
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{
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/* Turn of the phy */
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phy_off();
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/* flush any interrupts */
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writel(DAVINCI_USB_USBINT_MASK | DAVINCI_USB_TXINT_MASK |
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DAVINCI_USB_RXINT_MASK , &dregs->intclrr);
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}
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87
drivers/usb/davinci_usb.h
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87
drivers/usb/davinci_usb.h
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@ -0,0 +1,87 @@
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/*
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* TI's Davinci platform specific USB wrapper functions.
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*
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* Copyright (c) 2008 Texas Instruments
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*
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* Author: Thomas Abraham t-abraham@ti.com, Texas Instruments
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*/
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#ifndef __DAVINCI_USB_H__
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#define __DAVINCI_USB_H__
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#include <asm/arch/hardware.h>
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#include "musb_core.h"
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/* Base address of DAVINCI usb0 wrapper */
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#define DAVINCI_USB0_BASE 0x01C64000
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/* Base address of DAVINCI musb core */
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#define MENTOR_USB0_BASE (DAVINCI_USB0_BASE+0x400)
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/*
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* Davinci platform USB wrapper register overlay. Note: Only the required
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* registers are included in this structure. It can be expanded as required.
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*/
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struct davinci_usb_regs {
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u32 version;
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u32 ctrlr;
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u32 reserved[0x20];
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u32 intclrr;
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u32 intmskr;
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u32 intmsksetr;
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};
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#define DAVINCI_USB_TX_ENDPTS_MASK 0x1f /* ep0 + 4 tx */
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#define DAVINCI_USB_RX_ENDPTS_MASK 0x1e /* 4 rx */
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#define DAVINCI_USB_USBINT_SHIFT 16
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#define DAVINCI_USB_TXINT_SHIFT 0
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#define DAVINCI_USB_RXINT_SHIFT 8
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#define DAVINCI_INTR_DRVVBUS 0x0100
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#define DAVINCI_USB_USBINT_MASK 0x01ff0000 /* 8 Mentor, DRVVBUS */
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#define DAVINCI_USB_TXINT_MASK \
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(DAVINCI_USB_TX_ENDPTS_MASK << DAVINCI_USB_TXINT_SHIFT)
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#define DAVINCI_USB_RXINT_MASK \
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(DAVINCI_USB_RX_ENDPTS_MASK << DAVINCI_USB_RXINT_SHIFT)
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#define MGC_BUSCTL_OFFSET(_bEnd, _bOffset) \
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(0x80 + (8*(_bEnd)) + (_bOffset))
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/* Integrated highspeed/otg PHY */
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#define USBPHY_CTL_PADDR (DAVINCI_SYSTEM_MODULE_BASE + 0x34)
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#define USBPHY_PHYCLKGD (1 << 8)
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#define USBPHY_SESNDEN (1 << 7) /* v(sess_end) comparator */
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#define USBPHY_VBDTCTEN (1 << 6) /* v(bus) comparator */
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#define USBPHY_PHYPLLON (1 << 4) /* override pll suspend */
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#define USBPHY_CLKO1SEL (1 << 3)
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#define USBPHY_OSCPDWN (1 << 2)
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#define USBPHY_PHYPDWN (1 << 0)
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/* Timeout for Davinci USB module */
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#define DAVINCI_USB_TIMEOUT 0x3FFFFFF
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/* IO Expander I2C address and VBUS enable mask */
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#define IOEXP_I2C_ADDR 0x3A
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#define IOEXP_VBUSEN_MASK 1
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/* extern functions */
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extern void lpsc_on(unsigned int id);
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extern int i2c_write(uchar chip, uint addr, int alen, uchar *buffer, int len);
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extern int i2c_read(uchar chip, uint addr, int alen, uchar *buffer, int len);
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extern void enable_vbus(void);
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#endif /* __DAVINCI_USB_H__ */
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