[U-Boot] [PATCH v3 3/5] usb : musb : Adding DM6446 (TI DaVinci) platform specific USB support

[Jean-Christophe PLAGNIOL-VILLARD]

On 09:41 Sun 04 Jan     , Thomas Abraham wrote:
> 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 |  106 +++++++++++++++++++++++++++++++++++++++++++++
>  drivers/usb/davinci_usb.h |   87 +++++++++++++++++++++++++++++++++++++
>  3 files changed, 194 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..e66f660
> --- /dev/null
> +++ b/drivers/usb/davinci_usb.c
> @@ -0,0 +1,106 @@
> +/*
> + * 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>
> +#include <asm/io.h>
> +#include "davinci_usb.h"
> +
> +/* MUSB platform configuration */
> +struct musb_config musb_cfg = {
> +	(struct	musb_regs *)MENTOR_USB0_BASE,
> +	DAVINCI_USB_TIMEOUT,
> +	0
> +};
> +
> +/* MUSB module register overlay */
> +struct davinci_usb_regs *dregs;
> +
> +/*
> + * 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 = musb_cfg.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 */
> +	dregs = (struct davinci_usb_regs *)DAVINCI_USB0_BASE;
> +	writel(1, &dregs->ctrlr);
> +	udelay(5000);
> +
> +	/* Returns zero if e.g. not clocked */
> +	revision = readl(&dregs->version);
> +	if (!revision)
> +		return -1;
> +
> +	/* Disable all interrupts */
> +	writel(DAVINCI_USB_USBINT_MASK | DAVINCI_USB_RXINT_MASK |
> +			DAVINCI_USB_TXINT_MASK , &dregs->intmsksetr);
> +	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 */
> +	writel(DAVINCI_USB_USBINT_MASK | DAVINCI_USB_TXINT_MASK |
> +			DAVINCI_USB_RXINT_MASK , &dregs->intclrr);
> +}
> diff --git a/drivers/usb/davinci_usb.h b/drivers/usb/davinci_usb.h
> new file mode 100644
> index 0000000..d270861
> --- /dev/null
> +++ b/drivers/usb/davinci_usb.h
> @@ -0,0 +1,87 @@
> +/*
> + * 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>
> +#include "musb_core.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)
					      ^
please add a space before and after '+'
> +
> +/*
> + * Davinci platform USB wrapper register overlay. Note: Only the required
> + * registers are included in this structure. It can be expanded as required.
> + */
> +struct davinci_usb_regs {
> +	u32	version;
> +	u32	ctrlr;
> +	u32	reserved[0x20];
> +	u32	intclrr;
> +	u32 	intmskr;
	   ^
whitespace please remove
> +	u32 	intmsksetr;
	   ^
whitespace please remove
there is other whitespaces please check
> +};
> +
> +#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 0x3FFFFFF
> +
> +/* 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);
all ready define in i2c.h

Best Regards,
J.