musb: MSC host support for AM35x
Tested MSC Host on AM3517EVM. Signed-off-by: Ajay Kumar Gupta <ajay.gupta@ti.com>
This commit is contained in:
Ajay Kumar Gupta
Remy Bohmer
parent
a7e9c513b6
commit
dbea324200
|
|
@ -31,6 +31,7 @@ COBJS-$(CONFIG_USB_BLACKFIN) += blackfin_usb.o
|
|||
COBJS-$(CONFIG_USB_DAVINCI) += davinci.o
|
||||
COBJS-$(CONFIG_USB_OMAP3) += omap3.o
|
||||
COBJS-$(CONFIG_USB_DA8XX) += da8xx.o
|
||||
COBJS-$(CONFIG_USB_AM35X) += am35x.o
|
||||
|
||||
COBJS := $(COBJS-y)
|
||||
SRCS := $(COBJS:.o=.c)
|
||||
|
|
|
|||
|
|
@ -0,0 +1,118 @@
|
|||
/*
|
||||
* am35x.c - TI's AM35x platform specific usb wrapper functions.
|
||||
*
|
||||
* Author: Ajay Kumar Gupta <ajay.gupta@ti.com>
|
||||
*
|
||||
* Based on drivers/usb/musb/da8xx.c
|
||||
*
|
||||
* Copyright (c) 2010 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 "am35x.h"
|
||||
|
||||
/* MUSB platform configuration */
|
||||
struct musb_config musb_cfg = {
|
||||
.regs = (struct musb_regs *)AM35X_USB_OTG_CORE_BASE,
|
||||
.timeout = AM35X_USB_OTG_TIMEOUT,
|
||||
.musb_speed = 0,
|
||||
};
|
||||
|
||||
/*
|
||||
* Enable the USB phy
|
||||
*/
|
||||
static u8 phy_on(void)
|
||||
{
|
||||
u32 devconf2;
|
||||
u32 timeout;
|
||||
|
||||
devconf2 = readl(&am35x_scm_general_regs->devconf2);
|
||||
|
||||
devconf2 &= ~(DEVCONF2_RESET | DEVCONF2_PHYPWRDN | DEVCONF2_OTGPWRDN |
|
||||
DEVCONF2_OTGMODE | DEVCONF2_REFFREQ |
|
||||
DEVCONF2_PHY_GPIOMODE);
|
||||
devconf2 |= DEVCONF2_SESENDEN | DEVCONF2_VBDTCTEN | DEVCONF2_PHY_PLLON |
|
||||
DEVCONF2_REFFREQ_13MHZ | DEVCONF2_DATPOL;
|
||||
|
||||
writel(devconf2, &am35x_scm_general_regs->devconf2);
|
||||
|
||||
/* wait until the USB phy is turned on */
|
||||
timeout = musb_cfg.timeout;
|
||||
while (timeout--)
|
||||
if (readl(&am35x_scm_general_regs->devconf2) & DEVCONF2_PHYCKGD)
|
||||
return 1;
|
||||
|
||||
/* USB phy was not turned on */
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* Disable the USB phy
|
||||
*/
|
||||
static void phy_off(void)
|
||||
{
|
||||
u32 devconf2;
|
||||
|
||||
/*
|
||||
* Power down the on-chip PHY.
|
||||
*/
|
||||
devconf2 = readl(&am35x_scm_general_regs->devconf2);
|
||||
|
||||
devconf2 &= ~DEVCONF2_PHY_PLLON;
|
||||
devconf2 |= DEVCONF2_PHYPWRDN | DEVCONF2_OTGPWRDN;
|
||||
writel(devconf2, &am35x_scm_general_regs->devconf2);
|
||||
}
|
||||
|
||||
/*
|
||||
* This function performs platform specific initialization for usb0.
|
||||
*/
|
||||
int musb_platform_init(void)
|
||||
{
|
||||
u32 revision;
|
||||
u32 sw_reset;
|
||||
|
||||
/* global usb reset */
|
||||
sw_reset = readl(&am35x_scm_general_regs->ip_sw_reset);
|
||||
sw_reset |= (1 << 0);
|
||||
writel(sw_reset, &am35x_scm_general_regs->ip_sw_reset);
|
||||
sw_reset &= ~(1 << 0);
|
||||
writel(sw_reset, &am35x_scm_general_regs->ip_sw_reset);
|
||||
|
||||
/* reset the controller */
|
||||
writel(0x1, &am35x_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(&am35x_usb_regs->revision);
|
||||
if (revision == 0)
|
||||
return -1;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* This function performs platform specific deinitialization for usb0.
|
||||
*/
|
||||
void musb_platform_deinit(void)
|
||||
{
|
||||
/* Turn off the phy */
|
||||
phy_off();
|
||||
}
|
||||
|
|
@ -0,0 +1,94 @@
|
|||
/*
|
||||
* am35x.h - TI's AM35x platform specific usb wrapper definitions.
|
||||
*
|
||||
* Author: Ajay Kumar Gupta <ajay.gupta@ti.com>
|
||||
*
|
||||
* Based on drivers/usb/musb/da8xx.h
|
||||
*
|
||||
* Copyright (c) 2010 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 __AM35X_USB_H__
|
||||
#define __AM35X_USB_H__
|
||||
|
||||
#include <asm/arch/am35x_def.h>
|
||||
#include "musb_core.h"
|
||||
|
||||
/* Base address of musb wrapper */
|
||||
#define AM35X_USB_OTG_BASE 0x5C040000
|
||||
|
||||
/* Base address of musb core */
|
||||
#define AM35X_USB_OTG_CORE_BASE (AM35X_USB_OTG_BASE + 0x400)
|
||||
|
||||
/* Timeout for AM35x usb module */
|
||||
#define AM35X_USB_OTG_TIMEOUT 0x3FFFFFF
|
||||
|
||||
/*
|
||||
* AM35x platform USB wrapper register overlay.
|
||||
*/
|
||||
struct am35x_usb_regs {
|
||||
u32 revision;
|
||||
u32 control;
|
||||
u32 status;
|
||||
u32 emulation;
|
||||
u32 reserved0[1];
|
||||
u32 autoreq;
|
||||
u32 srpfixtime;
|
||||
u32 ep_intsrc;
|
||||
u32 ep_intsrcset;
|
||||
u32 ep_intsrcclr;
|
||||
u32 ep_intmsk;
|
||||
u32 ep_intmskset;
|
||||
u32 ep_intmskclr;
|
||||
u32 ep_intsrcmsked;
|
||||
u32 reserved1[1];
|
||||
u32 core_intsrc;
|
||||
u32 core_intsrcset;
|
||||
u32 core_intsrcclr;
|
||||
u32 core_intmsk;
|
||||
u32 core_intmskset;
|
||||
u32 core_intmskclr;
|
||||
u32 core_intsrcmsked;
|
||||
u32 reserved2[1];
|
||||
u32 eoi;
|
||||
u32 mop_sop_en;
|
||||
u32 reserved3[2];
|
||||
u32 txmode;
|
||||
u32 rxmode;
|
||||
u32 epcount_mode;
|
||||
};
|
||||
|
||||
#define am35x_usb_regs ((struct am35x_usb_regs *)AM35X_USB_OTG_BASE)
|
||||
|
||||
/* USB 2.0 PHY Control */
|
||||
#define DEVCONF2_PHY_GPIOMODE (1 << 23)
|
||||
#define DEVCONF2_OTGMODE (3 << 14)
|
||||
#define DEVCONF2_SESENDEN (1 << 13) /* Vsess_end comparator */
|
||||
#define DEVCONF2_VBDTCTEN (1 << 12) /* Vbus comparator */
|
||||
#define DEVCONF2_REFFREQ_24MHZ (2 << 8)
|
||||
#define DEVCONF2_REFFREQ_26MHZ (7 << 8)
|
||||
#define DEVCONF2_REFFREQ_13MHZ (6 << 8)
|
||||
#define DEVCONF2_REFFREQ (0xf << 8)
|
||||
#define DEVCONF2_PHYCKGD (1 << 7)
|
||||
#define DEVCONF2_VBUSSENSE (1 << 6)
|
||||
#define DEVCONF2_PHY_PLLON (1 << 5) /* override PLL suspend */
|
||||
#define DEVCONF2_RESET (1 << 4)
|
||||
#define DEVCONF2_PHYPWRDN (1 << 3)
|
||||
#define DEVCONF2_OTGPWRDN (1 << 2)
|
||||
#define DEVCONF2_DATPOL (1 << 1)
|
||||
|
||||
#endif /* __AM35X_USB_H__ */
|
||||
|
|
@ -57,6 +57,8 @@
|
|||
#include "musb_core.h"
|
||||
#if defined(CONFIG_USB_OMAP3)
|
||||
#include "omap3.h"
|
||||
#elif defined(CONFIG_USB_AM35X)
|
||||
#include "am35x.h"
|
||||
#elif defined(CONFIG_USB_DAVINCI)
|
||||
#include "davinci.h"
|
||||
#endif
|
||||
|
|
|
|||
|
|
@ -133,7 +133,7 @@ struct usb_device {
|
|||
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_DA8XX) || \
|
||||
defined(CONFIG_USB_BLACKFIN)
|
||||
defined(CONFIG_USB_BLACKFIN) || defined(CONFIG_USB_AM35X)
|
||||
|
||||
int usb_lowlevel_init(void);
|
||||
int usb_lowlevel_stop(void);
|
||||
|
|
|
|||
Loading…
Reference in New Issue