2010-09-24 10:44:03 +00:00
|
|
|
/*
|
|
|
|
* Texas Instruments DA8xx/OMAP-L1x "glue layer"
|
|
|
|
*
|
|
|
|
* Copyright (c) 2008-2009 MontaVista Software, Inc. <source@mvista.com>
|
|
|
|
*
|
|
|
|
* Based on the DaVinci "glue layer" code.
|
|
|
|
* Copyright (C) 2005-2006 by Texas Instruments
|
|
|
|
*
|
|
|
|
* This file is part of the Inventra Controller Driver for Linux.
|
|
|
|
*
|
|
|
|
* The Inventra Controller Driver for Linux is free software; you
|
|
|
|
* can redistribute it and/or modify it under the terms of the GNU
|
|
|
|
* General Public License version 2 as published by the Free Software
|
|
|
|
* Foundation.
|
|
|
|
*
|
|
|
|
* The Inventra Controller Driver for Linux 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 The Inventra Controller Driver for Linux ; if not,
|
|
|
|
* write to the Free Software Foundation, Inc., 59 Temple Place,
|
|
|
|
* Suite 330, Boston, MA 02111-1307 USA
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
2011-11-10 07:58:04 +00:00
|
|
|
#include <linux/module.h>
|
2010-09-24 10:44:03 +00:00
|
|
|
#include <linux/clk.h>
|
2012-06-26 12:10:32 +00:00
|
|
|
#include <linux/err.h>
|
2010-09-24 10:44:03 +00:00
|
|
|
#include <linux/io.h>
|
2010-12-02 07:19:35 +00:00
|
|
|
#include <linux/platform_device.h>
|
|
|
|
#include <linux/dma-mapping.h>
|
2014-04-16 20:28:32 +00:00
|
|
|
#include <linux/usb/usb_phy_generic.h>
|
2010-09-24 10:44:03 +00:00
|
|
|
|
|
|
|
#include <mach/da8xx.h>
|
2012-08-24 13:11:34 +00:00
|
|
|
#include <linux/platform_data/usb-davinci.h>
|
2010-09-24 10:44:03 +00:00
|
|
|
|
|
|
|
#include "musb_core.h"
|
|
|
|
|
|
|
|
/*
|
|
|
|
* DA8XX specific definitions
|
|
|
|
*/
|
|
|
|
|
|
|
|
/* USB 2.0 OTG module registers */
|
|
|
|
#define DA8XX_USB_REVISION_REG 0x00
|
|
|
|
#define DA8XX_USB_CTRL_REG 0x04
|
|
|
|
#define DA8XX_USB_STAT_REG 0x08
|
|
|
|
#define DA8XX_USB_EMULATION_REG 0x0c
|
|
|
|
#define DA8XX_USB_MODE_REG 0x10 /* Transparent, CDC, [Generic] RNDIS */
|
|
|
|
#define DA8XX_USB_AUTOREQ_REG 0x14
|
|
|
|
#define DA8XX_USB_SRP_FIX_TIME_REG 0x18
|
|
|
|
#define DA8XX_USB_TEARDOWN_REG 0x1c
|
|
|
|
#define DA8XX_USB_INTR_SRC_REG 0x20
|
|
|
|
#define DA8XX_USB_INTR_SRC_SET_REG 0x24
|
|
|
|
#define DA8XX_USB_INTR_SRC_CLEAR_REG 0x28
|
|
|
|
#define DA8XX_USB_INTR_MASK_REG 0x2c
|
|
|
|
#define DA8XX_USB_INTR_MASK_SET_REG 0x30
|
|
|
|
#define DA8XX_USB_INTR_MASK_CLEAR_REG 0x34
|
|
|
|
#define DA8XX_USB_INTR_SRC_MASKED_REG 0x38
|
|
|
|
#define DA8XX_USB_END_OF_INTR_REG 0x3c
|
|
|
|
#define DA8XX_USB_GENERIC_RNDIS_EP_SIZE_REG(n) (0x50 + (((n) - 1) << 2))
|
|
|
|
|
|
|
|
/* Control register bits */
|
|
|
|
#define DA8XX_SOFT_RESET_MASK 1
|
|
|
|
|
|
|
|
#define DA8XX_USB_TX_EP_MASK 0x1f /* EP0 + 4 Tx EPs */
|
|
|
|
#define DA8XX_USB_RX_EP_MASK 0x1e /* 4 Rx EPs */
|
|
|
|
|
|
|
|
/* USB interrupt register bits */
|
|
|
|
#define DA8XX_INTR_USB_SHIFT 16
|
|
|
|
#define DA8XX_INTR_USB_MASK (0x1ff << DA8XX_INTR_USB_SHIFT) /* 8 Mentor */
|
|
|
|
/* interrupts and DRVVBUS interrupt */
|
|
|
|
#define DA8XX_INTR_DRVVBUS 0x100
|
|
|
|
#define DA8XX_INTR_RX_SHIFT 8
|
|
|
|
#define DA8XX_INTR_RX_MASK (DA8XX_USB_RX_EP_MASK << DA8XX_INTR_RX_SHIFT)
|
|
|
|
#define DA8XX_INTR_TX_SHIFT 0
|
|
|
|
#define DA8XX_INTR_TX_MASK (DA8XX_USB_TX_EP_MASK << DA8XX_INTR_TX_SHIFT)
|
|
|
|
|
|
|
|
#define DA8XX_MENTOR_CORE_OFFSET 0x400
|
|
|
|
|
|
|
|
#define CFGCHIP2 IO_ADDRESS(DA8XX_SYSCFG0_BASE + DA8XX_CFGCHIP2_REG)
|
|
|
|
|
2010-12-02 07:40:34 +00:00
|
|
|
struct da8xx_glue {
|
|
|
|
struct device *dev;
|
|
|
|
struct platform_device *musb;
|
2014-04-16 21:16:33 +00:00
|
|
|
struct platform_device *phy;
|
2010-12-02 07:57:08 +00:00
|
|
|
struct clk *clk;
|
2010-12-02 07:40:34 +00:00
|
|
|
};
|
|
|
|
|
2010-09-24 10:44:03 +00:00
|
|
|
/*
|
|
|
|
* REVISIT (PM): we should be able to keep the PHY in low power mode most
|
|
|
|
* of the time (24 MHz oscillator and PLL off, etc.) by setting POWER.D0
|
|
|
|
* and, when in host mode, autosuspending idle root ports... PHY_PLLON
|
|
|
|
* (overriding SUSPENDM?) then likely needs to stay off.
|
|
|
|
*/
|
|
|
|
|
|
|
|
static inline void phy_on(void)
|
|
|
|
{
|
|
|
|
u32 cfgchip2 = __raw_readl(CFGCHIP2);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Start the on-chip PHY and its PLL.
|
|
|
|
*/
|
|
|
|
cfgchip2 &= ~(CFGCHIP2_RESET | CFGCHIP2_PHYPWRDN | CFGCHIP2_OTGPWRDN);
|
|
|
|
cfgchip2 |= CFGCHIP2_PHY_PLLON;
|
|
|
|
__raw_writel(cfgchip2, CFGCHIP2);
|
|
|
|
|
|
|
|
pr_info("Waiting for USB PHY clock good...\n");
|
|
|
|
while (!(__raw_readl(CFGCHIP2) & CFGCHIP2_PHYCLKGD))
|
|
|
|
cpu_relax();
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline void phy_off(void)
|
|
|
|
{
|
|
|
|
u32 cfgchip2 = __raw_readl(CFGCHIP2);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Ensure that USB 1.1 reference clock is not being sourced from
|
|
|
|
* USB 2.0 PHY. Otherwise do not power down the PHY.
|
|
|
|
*/
|
|
|
|
if (!(cfgchip2 & CFGCHIP2_USB1PHYCLKMUX) &&
|
|
|
|
(cfgchip2 & CFGCHIP2_USB1SUSPENDM)) {
|
|
|
|
pr_warning("USB 1.1 clocked from USB 2.0 PHY -- "
|
|
|
|
"can't power it down\n");
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Power down the on-chip PHY.
|
|
|
|
*/
|
|
|
|
cfgchip2 |= CFGCHIP2_PHYPWRDN | CFGCHIP2_OTGPWRDN;
|
|
|
|
__raw_writel(cfgchip2, CFGCHIP2);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Because we don't set CTRL.UINT, it's "important" to:
|
|
|
|
* - not read/write INTRUSB/INTRUSBE (except during
|
|
|
|
* initial setup, as a workaround);
|
|
|
|
* - use INTSET/INTCLR instead.
|
|
|
|
*/
|
|
|
|
|
|
|
|
/**
|
2010-12-01 11:22:05 +00:00
|
|
|
* da8xx_musb_enable - enable interrupts
|
2010-09-24 10:44:03 +00:00
|
|
|
*/
|
2010-12-01 11:22:05 +00:00
|
|
|
static void da8xx_musb_enable(struct musb *musb)
|
2010-09-24 10:44:03 +00:00
|
|
|
{
|
|
|
|
void __iomem *reg_base = musb->ctrl_base;
|
|
|
|
u32 mask;
|
|
|
|
|
|
|
|
/* Workaround: setup IRQs through both register sets. */
|
|
|
|
mask = ((musb->epmask & DA8XX_USB_TX_EP_MASK) << DA8XX_INTR_TX_SHIFT) |
|
|
|
|
((musb->epmask & DA8XX_USB_RX_EP_MASK) << DA8XX_INTR_RX_SHIFT) |
|
|
|
|
DA8XX_INTR_USB_MASK;
|
|
|
|
musb_writel(reg_base, DA8XX_USB_INTR_MASK_SET_REG, mask);
|
|
|
|
|
|
|
|
/* Force the DRVVBUS IRQ so we can start polling for ID change. */
|
2011-11-24 13:46:26 +00:00
|
|
|
musb_writel(reg_base, DA8XX_USB_INTR_SRC_SET_REG,
|
|
|
|
DA8XX_INTR_DRVVBUS << DA8XX_INTR_USB_SHIFT);
|
2010-09-24 10:44:03 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
2010-12-01 11:22:05 +00:00
|
|
|
* da8xx_musb_disable - disable HDRC and flush interrupts
|
2010-09-24 10:44:03 +00:00
|
|
|
*/
|
2010-12-01 11:22:05 +00:00
|
|
|
static void da8xx_musb_disable(struct musb *musb)
|
2010-09-24 10:44:03 +00:00
|
|
|
{
|
|
|
|
void __iomem *reg_base = musb->ctrl_base;
|
|
|
|
|
|
|
|
musb_writel(reg_base, DA8XX_USB_INTR_MASK_CLEAR_REG,
|
|
|
|
DA8XX_INTR_USB_MASK |
|
|
|
|
DA8XX_INTR_TX_MASK | DA8XX_INTR_RX_MASK);
|
|
|
|
musb_writeb(musb->mregs, MUSB_DEVCTL, 0);
|
|
|
|
musb_writel(reg_base, DA8XX_USB_END_OF_INTR_REG, 0);
|
|
|
|
}
|
|
|
|
|
2011-06-22 14:28:09 +00:00
|
|
|
#define portstate(stmt) stmt
|
2010-09-24 10:44:03 +00:00
|
|
|
|
2010-12-01 11:22:05 +00:00
|
|
|
static void da8xx_musb_set_vbus(struct musb *musb, int is_on)
|
2010-09-24 10:44:03 +00:00
|
|
|
{
|
|
|
|
WARN_ON(is_on && is_peripheral_active(musb));
|
|
|
|
}
|
|
|
|
|
|
|
|
#define POLL_SECONDS 2
|
|
|
|
|
|
|
|
static struct timer_list otg_workaround;
|
|
|
|
|
|
|
|
static void otg_timer(unsigned long _musb)
|
|
|
|
{
|
|
|
|
struct musb *musb = (void *)_musb;
|
|
|
|
void __iomem *mregs = musb->mregs;
|
|
|
|
u8 devctl;
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* We poll because DaVinci's won't expose several OTG-critical
|
|
|
|
* status change events (from the transceiver) otherwise.
|
|
|
|
*/
|
|
|
|
devctl = musb_readb(mregs, MUSB_DEVCTL);
|
2011-05-11 09:44:08 +00:00
|
|
|
dev_dbg(musb->controller, "Poll devctl %02x (%s)\n", devctl,
|
2014-10-30 17:41:13 +00:00
|
|
|
usb_otg_state_string(musb->xceiv->otg->state));
|
2010-09-24 10:44:03 +00:00
|
|
|
|
|
|
|
spin_lock_irqsave(&musb->lock, flags);
|
2014-10-30 17:41:13 +00:00
|
|
|
switch (musb->xceiv->otg->state) {
|
2010-09-24 10:44:03 +00:00
|
|
|
case OTG_STATE_A_WAIT_BCON:
|
|
|
|
devctl &= ~MUSB_DEVCTL_SESSION;
|
|
|
|
musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
|
|
|
|
|
|
|
|
devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
|
|
|
|
if (devctl & MUSB_DEVCTL_BDEVICE) {
|
2014-10-30 17:41:13 +00:00
|
|
|
musb->xceiv->otg->state = OTG_STATE_B_IDLE;
|
2010-09-24 10:44:03 +00:00
|
|
|
MUSB_DEV_MODE(musb);
|
|
|
|
} else {
|
2014-10-30 17:41:13 +00:00
|
|
|
musb->xceiv->otg->state = OTG_STATE_A_IDLE;
|
2010-09-24 10:44:03 +00:00
|
|
|
MUSB_HST_MODE(musb);
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
case OTG_STATE_A_WAIT_VFALL:
|
|
|
|
/*
|
|
|
|
* Wait till VBUS falls below SessionEnd (~0.2 V); the 1.3
|
|
|
|
* RTL seems to mis-handle session "start" otherwise (or in
|
|
|
|
* our case "recover"), in routine "VBUS was valid by the time
|
|
|
|
* VBUSERR got reported during enumeration" cases.
|
|
|
|
*/
|
|
|
|
if (devctl & MUSB_DEVCTL_VBUS) {
|
|
|
|
mod_timer(&otg_workaround, jiffies + POLL_SECONDS * HZ);
|
|
|
|
break;
|
|
|
|
}
|
2014-10-30 17:41:13 +00:00
|
|
|
musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE;
|
2010-09-24 10:44:03 +00:00
|
|
|
musb_writel(musb->ctrl_base, DA8XX_USB_INTR_SRC_SET_REG,
|
|
|
|
MUSB_INTR_VBUSERROR << DA8XX_INTR_USB_SHIFT);
|
|
|
|
break;
|
|
|
|
case OTG_STATE_B_IDLE:
|
|
|
|
/*
|
|
|
|
* There's no ID-changed IRQ, so we have no good way to tell
|
|
|
|
* when to switch to the A-Default state machine (by setting
|
|
|
|
* the DEVCTL.Session bit).
|
|
|
|
*
|
|
|
|
* Workaround: whenever we're in B_IDLE, try setting the
|
|
|
|
* session flag every few seconds. If it works, ID was
|
|
|
|
* grounded and we're now in the A-Default state machine.
|
|
|
|
*
|
|
|
|
* NOTE: setting the session flag is _supposed_ to trigger
|
|
|
|
* SRP but clearly it doesn't.
|
|
|
|
*/
|
|
|
|
musb_writeb(mregs, MUSB_DEVCTL, devctl | MUSB_DEVCTL_SESSION);
|
|
|
|
devctl = musb_readb(mregs, MUSB_DEVCTL);
|
|
|
|
if (devctl & MUSB_DEVCTL_BDEVICE)
|
|
|
|
mod_timer(&otg_workaround, jiffies + POLL_SECONDS * HZ);
|
|
|
|
else
|
2014-10-30 17:41:13 +00:00
|
|
|
musb->xceiv->otg->state = OTG_STATE_A_IDLE;
|
2010-09-24 10:44:03 +00:00
|
|
|
break;
|
|
|
|
default:
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
spin_unlock_irqrestore(&musb->lock, flags);
|
|
|
|
}
|
|
|
|
|
2010-12-01 11:22:05 +00:00
|
|
|
static void da8xx_musb_try_idle(struct musb *musb, unsigned long timeout)
|
2010-09-24 10:44:03 +00:00
|
|
|
{
|
|
|
|
static unsigned long last_timer;
|
|
|
|
|
|
|
|
if (timeout == 0)
|
|
|
|
timeout = jiffies + msecs_to_jiffies(3);
|
|
|
|
|
|
|
|
/* Never idle if active, or when VBUS timeout is not set as host */
|
|
|
|
if (musb->is_active || (musb->a_wait_bcon == 0 &&
|
2014-10-30 17:41:13 +00:00
|
|
|
musb->xceiv->otg->state == OTG_STATE_A_WAIT_BCON)) {
|
2011-05-11 09:44:08 +00:00
|
|
|
dev_dbg(musb->controller, "%s active, deleting timer\n",
|
2014-10-30 17:41:13 +00:00
|
|
|
usb_otg_state_string(musb->xceiv->otg->state));
|
2010-09-24 10:44:03 +00:00
|
|
|
del_timer(&otg_workaround);
|
|
|
|
last_timer = jiffies;
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (time_after(last_timer, timeout) && timer_pending(&otg_workaround)) {
|
2011-05-11 09:44:08 +00:00
|
|
|
dev_dbg(musb->controller, "Longer idle timer already pending, ignoring...\n");
|
2010-09-24 10:44:03 +00:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
last_timer = timeout;
|
|
|
|
|
2011-05-11 09:44:08 +00:00
|
|
|
dev_dbg(musb->controller, "%s inactive, starting idle timer for %u ms\n",
|
2014-10-30 17:41:13 +00:00
|
|
|
usb_otg_state_string(musb->xceiv->otg->state),
|
2011-05-05 10:11:21 +00:00
|
|
|
jiffies_to_msecs(timeout - jiffies));
|
2010-09-24 10:44:03 +00:00
|
|
|
mod_timer(&otg_workaround, timeout);
|
|
|
|
}
|
|
|
|
|
2010-12-01 11:22:05 +00:00
|
|
|
static irqreturn_t da8xx_musb_interrupt(int irq, void *hci)
|
2010-09-24 10:44:03 +00:00
|
|
|
{
|
|
|
|
struct musb *musb = hci;
|
|
|
|
void __iomem *reg_base = musb->ctrl_base;
|
2012-02-13 11:24:15 +00:00
|
|
|
struct usb_otg *otg = musb->xceiv->otg;
|
2010-09-24 10:44:03 +00:00
|
|
|
unsigned long flags;
|
|
|
|
irqreturn_t ret = IRQ_NONE;
|
|
|
|
u32 status;
|
|
|
|
|
|
|
|
spin_lock_irqsave(&musb->lock, flags);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* NOTE: DA8XX shadows the Mentor IRQs. Don't manage them through
|
|
|
|
* the Mentor registers (except for setup), use the TI ones and EOI.
|
|
|
|
*/
|
|
|
|
|
|
|
|
/* Acknowledge and handle non-CPPI interrupts */
|
|
|
|
status = musb_readl(reg_base, DA8XX_USB_INTR_SRC_MASKED_REG);
|
|
|
|
if (!status)
|
|
|
|
goto eoi;
|
|
|
|
|
|
|
|
musb_writel(reg_base, DA8XX_USB_INTR_SRC_CLEAR_REG, status);
|
2011-05-11 09:44:08 +00:00
|
|
|
dev_dbg(musb->controller, "USB IRQ %08x\n", status);
|
2010-09-24 10:44:03 +00:00
|
|
|
|
|
|
|
musb->int_rx = (status & DA8XX_INTR_RX_MASK) >> DA8XX_INTR_RX_SHIFT;
|
|
|
|
musb->int_tx = (status & DA8XX_INTR_TX_MASK) >> DA8XX_INTR_TX_SHIFT;
|
|
|
|
musb->int_usb = (status & DA8XX_INTR_USB_MASK) >> DA8XX_INTR_USB_SHIFT;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* DRVVBUS IRQs are the only proxy we have (a very poor one!) for
|
|
|
|
* DA8xx's missing ID change IRQ. We need an ID change IRQ to
|
|
|
|
* switch appropriately between halves of the OTG state machine.
|
|
|
|
* Managing DEVCTL.Session per Mentor docs requires that we know its
|
|
|
|
* value but DEVCTL.BDevice is invalid without DEVCTL.Session set.
|
|
|
|
* Also, DRVVBUS pulses for SRP (but not at 5 V)...
|
|
|
|
*/
|
|
|
|
if (status & (DA8XX_INTR_DRVVBUS << DA8XX_INTR_USB_SHIFT)) {
|
|
|
|
int drvvbus = musb_readl(reg_base, DA8XX_USB_STAT_REG);
|
|
|
|
void __iomem *mregs = musb->mregs;
|
|
|
|
u8 devctl = musb_readb(mregs, MUSB_DEVCTL);
|
|
|
|
int err;
|
|
|
|
|
2013-03-14 09:18:29 +00:00
|
|
|
err = musb->int_usb & MUSB_INTR_VBUSERROR;
|
2010-09-24 10:44:03 +00:00
|
|
|
if (err) {
|
|
|
|
/*
|
|
|
|
* The Mentor core doesn't debounce VBUS as needed
|
|
|
|
* to cope with device connect current spikes. This
|
|
|
|
* means it's not uncommon for bus-powered devices
|
|
|
|
* to get VBUS errors during enumeration.
|
|
|
|
*
|
|
|
|
* This is a workaround, but newer RTL from Mentor
|
|
|
|
* seems to allow a better one: "re"-starting sessions
|
|
|
|
* without waiting for VBUS to stop registering in
|
|
|
|
* devctl.
|
|
|
|
*/
|
|
|
|
musb->int_usb &= ~MUSB_INTR_VBUSERROR;
|
2014-10-30 17:41:13 +00:00
|
|
|
musb->xceiv->otg->state = OTG_STATE_A_WAIT_VFALL;
|
2010-09-24 10:44:03 +00:00
|
|
|
mod_timer(&otg_workaround, jiffies + POLL_SECONDS * HZ);
|
|
|
|
WARNING("VBUS error workaround (delay coming)\n");
|
2011-11-24 13:46:26 +00:00
|
|
|
} else if (drvvbus) {
|
2010-09-24 10:44:03 +00:00
|
|
|
MUSB_HST_MODE(musb);
|
2012-02-13 11:24:15 +00:00
|
|
|
otg->default_a = 1;
|
2014-10-30 17:41:13 +00:00
|
|
|
musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE;
|
2010-09-24 10:44:03 +00:00
|
|
|
portstate(musb->port1_status |= USB_PORT_STAT_POWER);
|
|
|
|
del_timer(&otg_workaround);
|
|
|
|
} else {
|
|
|
|
musb->is_active = 0;
|
|
|
|
MUSB_DEV_MODE(musb);
|
2012-02-13 11:24:15 +00:00
|
|
|
otg->default_a = 0;
|
2014-10-30 17:41:13 +00:00
|
|
|
musb->xceiv->otg->state = OTG_STATE_B_IDLE;
|
2010-09-24 10:44:03 +00:00
|
|
|
portstate(musb->port1_status &= ~USB_PORT_STAT_POWER);
|
|
|
|
}
|
|
|
|
|
2011-05-11 09:44:08 +00:00
|
|
|
dev_dbg(musb->controller, "VBUS %s (%s)%s, devctl %02x\n",
|
2010-09-24 10:44:03 +00:00
|
|
|
drvvbus ? "on" : "off",
|
2014-10-30 17:41:13 +00:00
|
|
|
usb_otg_state_string(musb->xceiv->otg->state),
|
2010-09-24 10:44:03 +00:00
|
|
|
err ? " ERROR" : "",
|
|
|
|
devctl);
|
|
|
|
ret = IRQ_HANDLED;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (musb->int_tx || musb->int_rx || musb->int_usb)
|
|
|
|
ret |= musb_interrupt(musb);
|
|
|
|
|
|
|
|
eoi:
|
|
|
|
/* EOI needs to be written for the IRQ to be re-asserted. */
|
|
|
|
if (ret == IRQ_HANDLED || status)
|
|
|
|
musb_writel(reg_base, DA8XX_USB_END_OF_INTR_REG, 0);
|
|
|
|
|
|
|
|
/* Poll for ID change */
|
2014-10-30 17:41:13 +00:00
|
|
|
if (musb->xceiv->otg->state == OTG_STATE_B_IDLE)
|
2010-09-24 10:44:03 +00:00
|
|
|
mod_timer(&otg_workaround, jiffies + POLL_SECONDS * HZ);
|
|
|
|
|
|
|
|
spin_unlock_irqrestore(&musb->lock, flags);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2010-12-01 11:22:05 +00:00
|
|
|
static int da8xx_musb_set_mode(struct musb *musb, u8 musb_mode)
|
2010-09-24 10:44:03 +00:00
|
|
|
{
|
|
|
|
u32 cfgchip2 = __raw_readl(CFGCHIP2);
|
|
|
|
|
|
|
|
cfgchip2 &= ~CFGCHIP2_OTGMODE;
|
|
|
|
switch (musb_mode) {
|
|
|
|
case MUSB_HOST: /* Force VBUS valid, ID = 0 */
|
|
|
|
cfgchip2 |= CFGCHIP2_FORCE_HOST;
|
|
|
|
break;
|
|
|
|
case MUSB_PERIPHERAL: /* Force VBUS valid, ID = 1 */
|
|
|
|
cfgchip2 |= CFGCHIP2_FORCE_DEVICE;
|
|
|
|
break;
|
|
|
|
case MUSB_OTG: /* Don't override the VBUS/ID comparators */
|
|
|
|
cfgchip2 |= CFGCHIP2_NO_OVERRIDE;
|
|
|
|
break;
|
|
|
|
default:
|
2011-05-11 09:44:08 +00:00
|
|
|
dev_dbg(musb->controller, "Trying to set unsupported mode %u\n", musb_mode);
|
2010-09-24 10:44:03 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
__raw_writel(cfgchip2, CFGCHIP2);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2010-12-01 11:22:05 +00:00
|
|
|
static int da8xx_musb_init(struct musb *musb)
|
2010-09-24 10:44:03 +00:00
|
|
|
{
|
|
|
|
void __iomem *reg_base = musb->ctrl_base;
|
|
|
|
u32 rev;
|
2013-01-04 15:13:58 +00:00
|
|
|
int ret = -ENODEV;
|
2010-09-24 10:44:03 +00:00
|
|
|
|
|
|
|
musb->mregs += DA8XX_MENTOR_CORE_OFFSET;
|
|
|
|
|
|
|
|
/* Returns zero if e.g. not clocked */
|
|
|
|
rev = musb_readl(reg_base, DA8XX_USB_REVISION_REG);
|
|
|
|
if (!rev)
|
|
|
|
goto fail;
|
|
|
|
|
2012-06-22 11:32:46 +00:00
|
|
|
musb->xceiv = usb_get_phy(USB_PHY_TYPE_USB2);
|
2013-01-04 15:13:58 +00:00
|
|
|
if (IS_ERR_OR_NULL(musb->xceiv)) {
|
|
|
|
ret = -EPROBE_DEFER;
|
2010-09-24 10:44:03 +00:00
|
|
|
goto fail;
|
2013-01-04 15:13:58 +00:00
|
|
|
}
|
2010-09-24 10:44:03 +00:00
|
|
|
|
2011-11-24 13:46:26 +00:00
|
|
|
setup_timer(&otg_workaround, otg_timer, (unsigned long)musb);
|
2010-09-24 10:44:03 +00:00
|
|
|
|
|
|
|
/* Reset the controller */
|
|
|
|
musb_writel(reg_base, DA8XX_USB_CTRL_REG, DA8XX_SOFT_RESET_MASK);
|
|
|
|
|
|
|
|
/* Start the on-chip PHY and its PLL. */
|
|
|
|
phy_on();
|
|
|
|
|
|
|
|
msleep(5);
|
|
|
|
|
|
|
|
/* NOTE: IRQs are in mixed mode, not bypass to pure MUSB */
|
|
|
|
pr_debug("DA8xx OTG revision %08x, PHY %03x, control %02x\n",
|
|
|
|
rev, __raw_readl(CFGCHIP2),
|
|
|
|
musb_readb(reg_base, DA8XX_USB_CTRL_REG));
|
|
|
|
|
2010-12-01 11:22:05 +00:00
|
|
|
musb->isr = da8xx_musb_interrupt;
|
2010-09-24 10:44:03 +00:00
|
|
|
return 0;
|
|
|
|
fail:
|
2013-01-04 15:13:58 +00:00
|
|
|
return ret;
|
2010-09-24 10:44:03 +00:00
|
|
|
}
|
|
|
|
|
2010-12-01 11:22:05 +00:00
|
|
|
static int da8xx_musb_exit(struct musb *musb)
|
2010-09-24 10:44:03 +00:00
|
|
|
{
|
2011-11-24 13:46:26 +00:00
|
|
|
del_timer_sync(&otg_workaround);
|
2010-09-24 10:44:03 +00:00
|
|
|
|
|
|
|
phy_off();
|
|
|
|
|
2012-06-22 11:32:45 +00:00
|
|
|
usb_put_phy(musb->xceiv);
|
2010-09-24 10:44:03 +00:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
2010-12-01 11:22:05 +00:00
|
|
|
|
2010-12-02 07:48:58 +00:00
|
|
|
static const struct musb_platform_ops da8xx_ops = {
|
2014-11-24 19:05:03 +00:00
|
|
|
.quirks = MUSB_INDEXED_EP,
|
2010-12-01 11:22:05 +00:00
|
|
|
.init = da8xx_musb_init,
|
|
|
|
.exit = da8xx_musb_exit,
|
|
|
|
|
|
|
|
.enable = da8xx_musb_enable,
|
|
|
|
.disable = da8xx_musb_disable,
|
|
|
|
|
|
|
|
.set_mode = da8xx_musb_set_mode,
|
|
|
|
.try_idle = da8xx_musb_try_idle,
|
|
|
|
|
|
|
|
.set_vbus = da8xx_musb_set_vbus,
|
|
|
|
};
|
2010-12-02 07:19:35 +00:00
|
|
|
|
2013-09-19 23:14:38 +00:00
|
|
|
static const struct platform_device_info da8xx_dev_info = {
|
|
|
|
.name = "musb-hdrc",
|
|
|
|
.id = PLATFORM_DEVID_AUTO,
|
|
|
|
.dma_mask = DMA_BIT_MASK(32),
|
|
|
|
};
|
2010-12-02 07:19:35 +00:00
|
|
|
|
2012-11-19 18:21:48 +00:00
|
|
|
static int da8xx_probe(struct platform_device *pdev)
|
2010-12-02 07:19:35 +00:00
|
|
|
{
|
2013-04-24 14:21:42 +00:00
|
|
|
struct resource musb_resources[2];
|
2013-07-30 08:03:12 +00:00
|
|
|
struct musb_hdrc_platform_data *pdata = dev_get_platdata(&pdev->dev);
|
2010-12-02 07:19:35 +00:00
|
|
|
struct platform_device *musb;
|
2010-12-02 07:40:34 +00:00
|
|
|
struct da8xx_glue *glue;
|
2013-09-19 23:14:38 +00:00
|
|
|
struct platform_device_info pinfo;
|
2010-12-02 07:57:08 +00:00
|
|
|
struct clk *clk;
|
|
|
|
|
2010-12-02 07:19:35 +00:00
|
|
|
int ret = -ENOMEM;
|
|
|
|
|
2010-12-02 07:40:34 +00:00
|
|
|
glue = kzalloc(sizeof(*glue), GFP_KERNEL);
|
|
|
|
if (!glue) {
|
|
|
|
dev_err(&pdev->dev, "failed to allocate glue context\n");
|
|
|
|
goto err0;
|
|
|
|
}
|
|
|
|
|
2010-12-02 07:57:08 +00:00
|
|
|
clk = clk_get(&pdev->dev, "usb20");
|
|
|
|
if (IS_ERR(clk)) {
|
|
|
|
dev_err(&pdev->dev, "failed to get clock\n");
|
|
|
|
ret = PTR_ERR(clk);
|
2012-08-31 11:09:49 +00:00
|
|
|
goto err3;
|
2010-12-02 07:57:08 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
ret = clk_enable(clk);
|
|
|
|
if (ret) {
|
|
|
|
dev_err(&pdev->dev, "failed to enable clock\n");
|
2012-08-31 11:09:49 +00:00
|
|
|
goto err4;
|
2010-12-02 07:57:08 +00:00
|
|
|
}
|
|
|
|
|
2010-12-02 07:40:34 +00:00
|
|
|
glue->dev = &pdev->dev;
|
2010-12-02 07:57:08 +00:00
|
|
|
glue->clk = clk;
|
2010-12-02 07:40:34 +00:00
|
|
|
|
2010-12-02 07:48:58 +00:00
|
|
|
pdata->platform_ops = &da8xx_ops;
|
|
|
|
|
2014-04-16 21:16:33 +00:00
|
|
|
glue->phy = usb_phy_generic_register();
|
|
|
|
if (IS_ERR(glue->phy)) {
|
|
|
|
ret = PTR_ERR(glue->phy);
|
|
|
|
goto err5;
|
|
|
|
}
|
2010-12-02 07:40:34 +00:00
|
|
|
platform_set_drvdata(pdev, glue);
|
2010-12-02 07:19:35 +00:00
|
|
|
|
2013-04-24 14:21:42 +00:00
|
|
|
memset(musb_resources, 0x00, sizeof(*musb_resources) *
|
|
|
|
ARRAY_SIZE(musb_resources));
|
|
|
|
|
|
|
|
musb_resources[0].name = pdev->resource[0].name;
|
|
|
|
musb_resources[0].start = pdev->resource[0].start;
|
|
|
|
musb_resources[0].end = pdev->resource[0].end;
|
|
|
|
musb_resources[0].flags = pdev->resource[0].flags;
|
|
|
|
|
|
|
|
musb_resources[1].name = pdev->resource[1].name;
|
|
|
|
musb_resources[1].start = pdev->resource[1].start;
|
|
|
|
musb_resources[1].end = pdev->resource[1].end;
|
|
|
|
musb_resources[1].flags = pdev->resource[1].flags;
|
|
|
|
|
2013-09-19 23:14:38 +00:00
|
|
|
pinfo = da8xx_dev_info;
|
|
|
|
pinfo.parent = &pdev->dev;
|
|
|
|
pinfo.res = musb_resources;
|
|
|
|
pinfo.num_res = ARRAY_SIZE(musb_resources);
|
|
|
|
pinfo.data = pdata;
|
|
|
|
pinfo.size_data = sizeof(*pdata);
|
|
|
|
|
|
|
|
glue->musb = musb = platform_device_register_full(&pinfo);
|
|
|
|
if (IS_ERR(musb)) {
|
|
|
|
ret = PTR_ERR(musb);
|
|
|
|
dev_err(&pdev->dev, "failed to register musb device: %d\n", ret);
|
2014-04-16 21:16:33 +00:00
|
|
|
goto err6;
|
2010-12-02 07:19:35 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
2014-04-16 21:16:33 +00:00
|
|
|
err6:
|
|
|
|
usb_phy_generic_unregister(glue->phy);
|
|
|
|
|
2012-08-31 11:09:49 +00:00
|
|
|
err5:
|
2010-12-02 07:57:08 +00:00
|
|
|
clk_disable(clk);
|
|
|
|
|
2012-08-31 11:09:49 +00:00
|
|
|
err4:
|
2010-12-02 07:57:08 +00:00
|
|
|
clk_put(clk);
|
|
|
|
|
2012-08-31 11:09:49 +00:00
|
|
|
err3:
|
2010-12-02 07:40:34 +00:00
|
|
|
kfree(glue);
|
|
|
|
|
2010-12-02 07:19:35 +00:00
|
|
|
err0:
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2012-11-19 18:26:20 +00:00
|
|
|
static int da8xx_remove(struct platform_device *pdev)
|
2010-12-02 07:19:35 +00:00
|
|
|
{
|
2010-12-02 07:40:34 +00:00
|
|
|
struct da8xx_glue *glue = platform_get_drvdata(pdev);
|
2010-12-02 07:19:35 +00:00
|
|
|
|
2012-10-23 05:26:15 +00:00
|
|
|
platform_device_unregister(glue->musb);
|
2014-04-16 21:16:33 +00:00
|
|
|
usb_phy_generic_unregister(glue->phy);
|
2010-12-02 07:57:08 +00:00
|
|
|
clk_disable(glue->clk);
|
|
|
|
clk_put(glue->clk);
|
2010-12-02 07:40:34 +00:00
|
|
|
kfree(glue);
|
2010-12-02 07:19:35 +00:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct platform_driver da8xx_driver = {
|
2012-01-26 10:40:23 +00:00
|
|
|
.probe = da8xx_probe,
|
2012-11-19 18:21:08 +00:00
|
|
|
.remove = da8xx_remove,
|
2010-12-02 07:19:35 +00:00
|
|
|
.driver = {
|
|
|
|
.name = "musb-da8xx",
|
|
|
|
},
|
|
|
|
};
|
|
|
|
|
|
|
|
MODULE_DESCRIPTION("DA8xx/OMAP-L1x MUSB Glue Layer");
|
|
|
|
MODULE_AUTHOR("Sergei Shtylyov <sshtylyov@ru.mvista.com>");
|
|
|
|
MODULE_LICENSE("GPL v2");
|
2012-10-10 18:36:59 +00:00
|
|
|
module_platform_driver(da8xx_driver);
|