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DA8xx: Add MUSB host support

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Tested USB host functionality on DA830 EVM.

Signed-off-by: Ajay Kumar Gupta <ajay.gupta@ti.com>
Signed-off-by: Swaminathan S <swami.iyer@ti.com>
This commit is contained in:
Ajay Kumar Gupta 2009-12-22 10:56:13 +05:30 committed by Remy Bohmer
parent 0b232310b2
commit 7359273d94
4 changed files with 244 additions and 1 deletions
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1
drivers/usb/musb/Makefile
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@ -29,6 +29,7 @@ COBJS-$(CONFIG_MUSB_HCD) += musb_hcd.o musb_core.o
COBJS-$(CONFIG_MUSB_UDC) += musb_udc.o musb_core.o
COBJS-$(CONFIG_USB_DAVINCI) += davinci.o
COBJS-$(CONFIG_USB_OMAP3) += omap3.o
COBJS-$(CONFIG_USB_DA8XX) += da8xx.o
COBJS := $(COBJS-y)
SRCS := $(COBJS:.o=.c)

139
drivers/usb/musb/da8xx.c Normal file
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@ -0,0 +1,139 @@
/*
* da8xx.c - TI's DA8xx platform specific usb wrapper functions.
*
* Author: Ajay Kumar Gupta <ajay.gupta@ti.com>
*
* Based on drivers/usb/musb/davinci.c
*
* Copyright (C) 2009 Texas Instruments Incorporated
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <common.h>
#include "da8xx.h"
/* MUSB platform configuration */
struct musb_config musb_cfg = {
(struct musb_regs *)DA8XX_USB_OTG_CORE_BASE,
DA8XX_USB_OTG_TIMEOUT,
0
};
/*
* This function enables VBUS by driving the GPIO Bank4 Pin 15 high.
*/
static void enable_vbus(void)
{
u32 value;
/* configure GPIO bank4 pin 15 in output direction */
value = readl(&davinci_gpio_bank45->dir);
writel((value & (~DA8XX_USB_VBUS_GPIO)), &davinci_gpio_bank45->dir);
/* set GPIO bank4 pin 15 high to drive VBUS */
value = readl(&davinci_gpio_bank45->set_data);
writel((value | DA8XX_USB_VBUS_GPIO), &davinci_gpio_bank45->set_data);
}
/*
* Enable the usb0 phy. This initialization procedure is explained in
* the DA8xx USB user guide document.
*/
static u8 phy_on(void)
{
u32 timeout;
u32 cfgchip2;
cfgchip2 = readl(&davinci_syscfg_regs->cfgchip2);
cfgchip2 &= ~(CFGCHIP2_RESET | CFGCHIP2_PHYPWRDN | CFGCHIP2_OTGPWRDN |
CFGCHIP2_OTGMODE | CFGCHIP2_REFFREQ);
cfgchip2 |= CFGCHIP2_SESENDEN | CFGCHIP2_VBDTCTEN | CFGCHIP2_PHY_PLLON |
CFGCHIP2_REFFREQ_24MHZ;
writel(cfgchip2, &davinci_syscfg_regs->cfgchip2);
/* wait until the usb phy pll locks */
timeout = musb_cfg.timeout;
while (timeout--)
if (readl(&davinci_syscfg_regs->cfgchip2) & CFGCHIP2_PHYCLKGD)
return 1;
/* USB phy was not turned on */
return 0;
}
/*
* Disable the usb phy
*/
static void phy_off(void)
{
u32 cfgchip2;
/*
* Power down the on-chip PHY.
*/
cfgchip2 = readl(&davinci_syscfg_regs->cfgchip2);
cfgchip2 &= ~CFGCHIP2_PHY_PLLON;
cfgchip2 |= CFGCHIP2_PHYPWRDN | CFGCHIP2_OTGPWRDN;
writel(cfgchip2, &davinci_syscfg_regs->cfgchip2);
}
/*
* This function performs DA8xx platform specific initialization for usb0.
*/
int musb_platform_init(void)
{
u32 revision;
/* enable psc for usb2.0 */
lpsc_on(33);
/* enable usb vbus */
enable_vbus();
/* reset the controller */
writel(0x1, &da8xx_usb_regs->control);
udelay(5000);
/* start the on-chip usb phy and its pll */
if (phy_on() == 0)
return -1;
/* Returns zero if e.g. not clocked */
revision = readl(&da8xx_usb_regs->revision);
if (revision == 0)
return -1;
/* Disable all interrupts */
writel((DA8XX_USB_USBINT_MASK | DA8XX_USB_TXINT_MASK |
DA8XX_USB_RXINT_MASK), &da8xx_usb_regs->intmsk_set);
return 0;
}
/*
* This function performs DA8xx platform specific deinitialization for usb0.
*/
void musb_platform_deinit(void)
{
/* Turn of the phy */
phy_off();
/* flush any interrupts */
writel((DA8XX_USB_USBINT_MASK | DA8XX_USB_TXINT_MASK |
DA8XX_USB_RXINT_MASK), &da8xx_usb_regs->intmsk_clr);
writel(0, &da8xx_usb_regs->eoi);
}

103
drivers/usb/musb/da8xx.h Normal file
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@ -0,0 +1,103 @@
/*
* da8xx.h -- TI's DA8xx platform specific usb wrapper definitions.
*
* Author: Ajay Kumar Gupta <ajay.gupta@ti.com>
*
* Based on drivers/usb/musb/davinci.h
*
* Copyright (C) 2009 Texas Instruments Incorporated
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef __DA8XX_MUSB_H__
#define __DA8XX_MUSB_H__
#include <asm/arch/hardware.h>
#include <asm/arch/gpio_defs.h>
#include "musb_core.h"
/* Base address of da8xx usb0 wrapper */
#define DA8XX_USB_OTG_BASE 0x01E00000
/* Base address of da8xx musb core */
#define DA8XX_USB_OTG_CORE_BASE (DA8XX_USB_OTG_BASE + 0x400)
/* Timeout for DA8xx usb module */
#define DA8XX_USB_OTG_TIMEOUT 0x3FFFFFF
/*
* DA8xx platform USB wrapper register overlay.
*/
struct da8xx_usb_regs {
dv_reg revision;
dv_reg control;
dv_reg status;
dv_reg emulation;
dv_reg mode;
dv_reg autoreq;
dv_reg srpfixtime;
dv_reg teardown;
dv_reg intsrc;
dv_reg intsrc_set;
dv_reg intsrc_clr;
dv_reg intmsk;
dv_reg intmsk_set;
dv_reg intmsk_clr;
dv_reg intsrcmsk;
dv_reg eoi;
dv_reg intvector;
dv_reg grndis_size[4];
};
#define da8xx_usb_regs ((struct da8xx_usb_regs *)DA8XX_USB_OTG_BASE)
/* DA8XX interrupt bits definitions */
#define DA8XX_USB_TX_ENDPTS_MASK 0x1f /* ep0 + 4 tx */
#define DA8XX_USB_RX_ENDPTS_MASK 0x1e /* 4 rx */
#define DA8XX_USB_TXINT_SHIFT 0
#define DA8XX_USB_RXINT_SHIFT 8
#define DA8XX_USB_USBINT_MASK 0x01ff0000 /* 8 Mentor, DRVVBUS */
#define DA8XX_USB_TXINT_MASK \
(DA8XX_USB_TX_ENDPTS_MASK << DA8XX_USB_TXINT_SHIFT)
#define DA8XX_USB_RXINT_MASK \
(DA8XX_USB_RX_ENDPTS_MASK << DA8XX_USB_RXINT_SHIFT)
/* DA8xx CFGCHIP2 (USB 2.0 PHY Control) register bits */
#define CFGCHIP2_PHYCLKGD (1 << 17)
#define CFGCHIP2_VBUSSENSE (1 << 16)
#define CFGCHIP2_RESET (1 << 15)
#define CFGCHIP2_OTGMODE (3 << 13)
#define CFGCHIP2_NO_OVERRIDE (0 << 13)
#define CFGCHIP2_FORCE_HOST (1 << 13)
#define CFGCHIP2_FORCE_DEVICE (2 << 13)
#define CFGCHIP2_FORCE_HOST_VBUS_LOW (3 << 13)
#define CFGCHIP2_USB1PHYCLKMUX (1 << 12)
#define CFGCHIP2_USB2PHYCLKMUX (1 << 11)
#define CFGCHIP2_PHYPWRDN (1 << 10)
#define CFGCHIP2_OTGPWRDN (1 << 9)
#define CFGCHIP2_DATPOL (1 << 8)
#define CFGCHIP2_USB1SUSPENDM (1 << 7)
#define CFGCHIP2_PHY_PLLON (1 << 6) /* override PLL suspend */
#define CFGCHIP2_SESENDEN (1 << 5) /* Vsess_end comparator */
#define CFGCHIP2_VBDTCTEN (1 << 4) /* Vbus comparator */
#define CFGCHIP2_REFFREQ (0xf << 0)
#define CFGCHIP2_REFFREQ_12MHZ (1 << 0)
#define CFGCHIP2_REFFREQ_24MHZ (2 << 0)
#define CFGCHIP2_REFFREQ_48MHZ (3 << 0)
#define DA8XX_USB_VBUS_GPIO (1 << 15)
#endif /* __DA8XX_MUSB_H__ */

2
include/usb.h
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@ -132,7 +132,7 @@ struct usb_device {
defined(CONFIG_USB_EHCI) || defined(CONFIG_USB_OHCI_NEW) || \
defined(CONFIG_USB_SL811HS) || defined(CONFIG_USB_ISP116X_HCD) || \
defined(CONFIG_USB_R8A66597_HCD) || defined(CONFIG_USB_DAVINCI) || \
defined(CONFIG_USB_OMAP3)
defined(CONFIG_USB_OMAP3) || defined(CONFIG_USB_DA8XX)
int usb_lowlevel_init(void);
int usb_lowlevel_stop(void);