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-$(CONFIG_USB_BLACKFIN) += blackfin_usb.o
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COBJS-$(CONFIG_USB_DAVINCI) += davinci.o
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COBJS-$(CONFIG_USB_OMAP3) += omap3.o
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COBJS-$(CONFIG_USB_DA8XX) += da8xx.o
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COBJS-$(CONFIG_USB_AM35X) += am35x.o
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COBJS := $(COBJS-y)
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SRCS := $(COBJS:.o=.c)
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118
drivers/usb/musb/am35x.c
Normal file
118
drivers/usb/musb/am35x.c
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@ -0,0 +1,118 @@
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/*
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* am35x.c - TI's AM35x platform specific usb wrapper functions.
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*
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* Author: Ajay Kumar Gupta <ajay.gupta@ti.com>
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*
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* Based on drivers/usb/musb/da8xx.c
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*
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* Copyright (c) 2010 Texas Instruments Incorporated
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (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., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <common.h>
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#include "am35x.h"
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/* MUSB platform configuration */
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struct musb_config musb_cfg = {
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.regs = (struct musb_regs *)AM35X_USB_OTG_CORE_BASE,
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.timeout = AM35X_USB_OTG_TIMEOUT,
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.musb_speed = 0,
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};
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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 devconf2;
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u32 timeout;
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devconf2 = readl(&am35x_scm_general_regs->devconf2);
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devconf2 &= ~(DEVCONF2_RESET | DEVCONF2_PHYPWRDN | DEVCONF2_OTGPWRDN |
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DEVCONF2_OTGMODE | DEVCONF2_REFFREQ |
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DEVCONF2_PHY_GPIOMODE);
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devconf2 |= DEVCONF2_SESENDEN | DEVCONF2_VBDTCTEN | DEVCONF2_PHY_PLLON |
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DEVCONF2_REFFREQ_13MHZ | DEVCONF2_DATPOL;
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writel(devconf2, &am35x_scm_general_regs->devconf2);
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/* wait until the USB phy is turned on */
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timeout = musb_cfg.timeout;
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while (timeout--)
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if (readl(&am35x_scm_general_regs->devconf2) & DEVCONF2_PHYCKGD)
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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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u32 devconf2;
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/*
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* Power down the on-chip PHY.
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*/
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devconf2 = readl(&am35x_scm_general_regs->devconf2);
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devconf2 &= ~DEVCONF2_PHY_PLLON;
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devconf2 |= DEVCONF2_PHYPWRDN | DEVCONF2_OTGPWRDN;
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writel(devconf2, &am35x_scm_general_regs->devconf2);
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}
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/*
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* This function performs 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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u32 sw_reset;
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/* global usb reset */
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sw_reset = readl(&am35x_scm_general_regs->ip_sw_reset);
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sw_reset |= (1 << 0);
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writel(sw_reset, &am35x_scm_general_regs->ip_sw_reset);
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sw_reset &= ~(1 << 0);
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writel(sw_reset, &am35x_scm_general_regs->ip_sw_reset);
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/* reset the controller */
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writel(0x1, &am35x_usb_regs->control);
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udelay(5000);
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/* start the on-chip usb phy and its pll */
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if (phy_on() == 0)
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return -1;
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/* Returns zero if e.g. not clocked */
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revision = readl(&am35x_usb_regs->revision);
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if (revision == 0)
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return -1;
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return 0;
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}
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/*
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* This function performs 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 off the phy */
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phy_off();
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}
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94
drivers/usb/musb/am35x.h
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94
drivers/usb/musb/am35x.h
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@ -0,0 +1,94 @@
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/*
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* am35x.h - TI's AM35x platform specific usb wrapper definitions.
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*
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* Author: Ajay Kumar Gupta <ajay.gupta@ti.com>
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*
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* Based on drivers/usb/musb/da8xx.h
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*
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* Copyright (c) 2010 Texas Instruments Incorporated
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (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., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef __AM35X_USB_H__
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#define __AM35X_USB_H__
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#include <asm/arch/am35x_def.h>
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#include "musb_core.h"
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/* Base address of musb wrapper */
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#define AM35X_USB_OTG_BASE 0x5C040000
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/* Base address of musb core */
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#define AM35X_USB_OTG_CORE_BASE (AM35X_USB_OTG_BASE + 0x400)
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/* Timeout for AM35x usb module */
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#define AM35X_USB_OTG_TIMEOUT 0x3FFFFFF
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/*
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* AM35x platform USB wrapper register overlay.
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*/
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struct am35x_usb_regs {
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u32 revision;
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u32 control;
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u32 status;
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u32 emulation;
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u32 reserved0[1];
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u32 autoreq;
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u32 srpfixtime;
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u32 ep_intsrc;
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u32 ep_intsrcset;
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u32 ep_intsrcclr;
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u32 ep_intmsk;
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u32 ep_intmskset;
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u32 ep_intmskclr;
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u32 ep_intsrcmsked;
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u32 reserved1[1];
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u32 core_intsrc;
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u32 core_intsrcset;
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u32 core_intsrcclr;
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u32 core_intmsk;
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u32 core_intmskset;
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u32 core_intmskclr;
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u32 core_intsrcmsked;
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u32 reserved2[1];
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u32 eoi;
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u32 mop_sop_en;
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u32 reserved3[2];
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u32 txmode;
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u32 rxmode;
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u32 epcount_mode;
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};
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#define am35x_usb_regs ((struct am35x_usb_regs *)AM35X_USB_OTG_BASE)
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/* USB 2.0 PHY Control */
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#define DEVCONF2_PHY_GPIOMODE (1 << 23)
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#define DEVCONF2_OTGMODE (3 << 14)
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#define DEVCONF2_SESENDEN (1 << 13) /* Vsess_end comparator */
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#define DEVCONF2_VBDTCTEN (1 << 12) /* Vbus comparator */
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#define DEVCONF2_REFFREQ_24MHZ (2 << 8)
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#define DEVCONF2_REFFREQ_26MHZ (7 << 8)
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#define DEVCONF2_REFFREQ_13MHZ (6 << 8)
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#define DEVCONF2_REFFREQ (0xf << 8)
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#define DEVCONF2_PHYCKGD (1 << 7)
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#define DEVCONF2_VBUSSENSE (1 << 6)
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#define DEVCONF2_PHY_PLLON (1 << 5) /* override PLL suspend */
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#define DEVCONF2_RESET (1 << 4)
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#define DEVCONF2_PHYPWRDN (1 << 3)
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#define DEVCONF2_OTGPWRDN (1 << 2)
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#define DEVCONF2_DATPOL (1 << 1)
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#endif /* __AM35X_USB_H__ */
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@ -57,6 +57,8 @@
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#include "musb_core.h"
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#if defined(CONFIG_USB_OMAP3)
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#include "omap3.h"
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#elif defined(CONFIG_USB_AM35X)
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#include "am35x.h"
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#elif defined(CONFIG_USB_DAVINCI)
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#include "davinci.h"
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#endif
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@ -133,7 +133,7 @@ struct usb_device {
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defined(CONFIG_USB_SL811HS) || defined(CONFIG_USB_ISP116X_HCD) || \
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defined(CONFIG_USB_R8A66597_HCD) || defined(CONFIG_USB_DAVINCI) || \
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defined(CONFIG_USB_OMAP3) || defined(CONFIG_USB_DA8XX) || \
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defined(CONFIG_USB_BLACKFIN)
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defined(CONFIG_USB_BLACKFIN) || defined(CONFIG_USB_AM35X)
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int usb_lowlevel_init(void);
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int usb_lowlevel_stop(void);
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