forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
606 lines
17 KiB
606 lines
17 KiB
// SPDX-License-Identifier: GPL-2.0 |
|
/* |
|
* Copyright (C) 2005-2006 by Texas Instruments |
|
* |
|
* This file is part of the Inventra Controller Driver for Linux. |
|
*/ |
|
|
|
#include <linux/module.h> |
|
#include <linux/kernel.h> |
|
#include <linux/sched.h> |
|
#include <linux/list.h> |
|
#include <linux/delay.h> |
|
#include <linux/clk.h> |
|
#include <linux/err.h> |
|
#include <linux/io.h> |
|
#include <linux/gpio/consumer.h> |
|
#include <linux/platform_device.h> |
|
#include <linux/dma-mapping.h> |
|
#include <linux/usb/usb_phy_generic.h> |
|
|
|
#include <mach/cputype.h> |
|
#include <mach/hardware.h> |
|
|
|
#include <asm/mach-types.h> |
|
|
|
#include "musb_core.h" |
|
|
|
#include "davinci.h" |
|
#include "cppi_dma.h" |
|
|
|
|
|
#define USB_PHY_CTRL IO_ADDRESS(USBPHY_CTL_PADDR) |
|
#define DM355_DEEPSLEEP IO_ADDRESS(DM355_DEEPSLEEP_PADDR) |
|
|
|
struct davinci_glue { |
|
struct device *dev; |
|
struct platform_device *musb; |
|
struct clk *clk; |
|
bool vbus_state; |
|
struct gpio_desc *vbus; |
|
struct work_struct vbus_work; |
|
}; |
|
|
|
/* 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... PHYPLLON |
|
* (overriding SUSPENDM?) then likely needs to stay off. |
|
*/ |
|
|
|
static inline void phy_on(void) |
|
{ |
|
u32 phy_ctrl = __raw_readl(USB_PHY_CTRL); |
|
|
|
/* power everything up; start the on-chip PHY and its PLL */ |
|
phy_ctrl &= ~(USBPHY_OSCPDWN | USBPHY_OTGPDWN | USBPHY_PHYPDWN); |
|
phy_ctrl |= USBPHY_SESNDEN | USBPHY_VBDTCTEN | USBPHY_PHYPLLON; |
|
__raw_writel(phy_ctrl, USB_PHY_CTRL); |
|
|
|
/* wait for PLL to lock before proceeding */ |
|
while ((__raw_readl(USB_PHY_CTRL) & USBPHY_PHYCLKGD) == 0) |
|
cpu_relax(); |
|
} |
|
|
|
static inline void phy_off(void) |
|
{ |
|
u32 phy_ctrl = __raw_readl(USB_PHY_CTRL); |
|
|
|
/* powerdown the on-chip PHY, its PLL, and the OTG block */ |
|
phy_ctrl &= ~(USBPHY_SESNDEN | USBPHY_VBDTCTEN | USBPHY_PHYPLLON); |
|
phy_ctrl |= USBPHY_OSCPDWN | USBPHY_OTGPDWN | USBPHY_PHYPDWN; |
|
__raw_writel(phy_ctrl, USB_PHY_CTRL); |
|
} |
|
|
|
static int dma_off = 1; |
|
|
|
static void davinci_musb_enable(struct musb *musb) |
|
{ |
|
u32 tmp, old, val; |
|
|
|
/* workaround: setup irqs through both register sets */ |
|
tmp = (musb->epmask & DAVINCI_USB_TX_ENDPTS_MASK) |
|
<< DAVINCI_USB_TXINT_SHIFT; |
|
musb_writel(musb->ctrl_base, DAVINCI_USB_INT_MASK_SET_REG, tmp); |
|
old = tmp; |
|
tmp = (musb->epmask & (0xfffe & DAVINCI_USB_RX_ENDPTS_MASK)) |
|
<< DAVINCI_USB_RXINT_SHIFT; |
|
musb_writel(musb->ctrl_base, DAVINCI_USB_INT_MASK_SET_REG, tmp); |
|
tmp |= old; |
|
|
|
val = ~MUSB_INTR_SOF; |
|
tmp |= ((val & 0x01ff) << DAVINCI_USB_USBINT_SHIFT); |
|
musb_writel(musb->ctrl_base, DAVINCI_USB_INT_MASK_SET_REG, tmp); |
|
|
|
if (is_dma_capable() && !dma_off) |
|
printk(KERN_WARNING "%s %s: dma not reactivated\n", |
|
__FILE__, __func__); |
|
else |
|
dma_off = 0; |
|
|
|
/* force a DRVVBUS irq so we can start polling for ID change */ |
|
musb_writel(musb->ctrl_base, DAVINCI_USB_INT_SET_REG, |
|
DAVINCI_INTR_DRVVBUS << DAVINCI_USB_USBINT_SHIFT); |
|
} |
|
|
|
/* |
|
* Disable the HDRC and flush interrupts |
|
*/ |
|
static void davinci_musb_disable(struct musb *musb) |
|
{ |
|
/* because we don't set CTRLR.UINT, "important" to: |
|
* - not read/write INTRUSB/INTRUSBE |
|
* - (except during initial setup, as workaround) |
|
* - use INTSETR/INTCLRR instead |
|
*/ |
|
musb_writel(musb->ctrl_base, DAVINCI_USB_INT_MASK_CLR_REG, |
|
DAVINCI_USB_USBINT_MASK |
|
| DAVINCI_USB_TXINT_MASK |
|
| DAVINCI_USB_RXINT_MASK); |
|
musb_writel(musb->ctrl_base, DAVINCI_USB_EOI_REG, 0); |
|
|
|
if (is_dma_capable() && !dma_off) |
|
WARNING("dma still active\n"); |
|
} |
|
|
|
|
|
#define portstate(stmt) stmt |
|
|
|
/* |
|
* VBUS SWITCHING IS BOARD-SPECIFIC ... at least for the DM6446 EVM, |
|
* which doesn't wire DRVVBUS to the FET that switches it. Unclear |
|
* if that's a problem with the DM6446 chip or just with that board. |
|
* |
|
* In either case, the DM355 EVM automates DRVVBUS the normal way, |
|
* when J10 is out, and TI documents it as handling OTG. |
|
*/ |
|
|
|
/* I2C operations are always synchronous, and require a task context. |
|
* With unloaded systems, using the shared workqueue seems to suffice |
|
* to satisfy the 100msec A_WAIT_VRISE timeout... |
|
*/ |
|
static void evm_deferred_drvvbus(struct work_struct *work) |
|
{ |
|
struct davinci_glue *glue = container_of(work, struct davinci_glue, |
|
vbus_work); |
|
|
|
gpiod_set_value_cansleep(glue->vbus, glue->vbus_state); |
|
glue->vbus_state = !glue->vbus_state; |
|
} |
|
|
|
static void davinci_musb_source_power(struct musb *musb, int is_on, |
|
int immediate) |
|
{ |
|
struct davinci_glue *glue = dev_get_drvdata(musb->controller->parent); |
|
|
|
/* This GPIO handling is entirely optional */ |
|
if (!glue->vbus) |
|
return; |
|
|
|
if (is_on) |
|
is_on = 1; |
|
|
|
if (glue->vbus_state == is_on) |
|
return; |
|
/* 0/1 vs "-1 == unknown/init" */ |
|
glue->vbus_state = !is_on; |
|
|
|
if (machine_is_davinci_evm()) { |
|
if (immediate) |
|
gpiod_set_value_cansleep(glue->vbus, glue->vbus_state); |
|
else |
|
schedule_work(&glue->vbus_work); |
|
} |
|
if (immediate) |
|
glue->vbus_state = is_on; |
|
} |
|
|
|
static void davinci_musb_set_vbus(struct musb *musb, int is_on) |
|
{ |
|
WARN_ON(is_on && is_peripheral_active(musb)); |
|
davinci_musb_source_power(musb, is_on, 0); |
|
} |
|
|
|
|
|
#define POLL_SECONDS 2 |
|
|
|
static void otg_timer(struct timer_list *t) |
|
{ |
|
struct musb *musb = from_timer(musb, t, dev_timer); |
|
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); |
|
dev_dbg(musb->controller, "poll devctl %02x (%s)\n", devctl, |
|
usb_otg_state_string(musb->xceiv->otg->state)); |
|
|
|
spin_lock_irqsave(&musb->lock, flags); |
|
switch (musb->xceiv->otg->state) { |
|
case OTG_STATE_A_WAIT_VFALL: |
|
/* Wait till VBUS falls below SessionEnd (~0.2V); 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(&musb->dev_timer, jiffies + POLL_SECONDS * HZ); |
|
break; |
|
} |
|
musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE; |
|
musb_writel(musb->ctrl_base, DAVINCI_USB_INT_SET_REG, |
|
MUSB_INTR_VBUSERROR << DAVINCI_USB_USBINT_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 flag). |
|
* |
|
* 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(&musb->dev_timer, jiffies + POLL_SECONDS * HZ); |
|
else |
|
musb->xceiv->otg->state = OTG_STATE_A_IDLE; |
|
break; |
|
default: |
|
break; |
|
} |
|
spin_unlock_irqrestore(&musb->lock, flags); |
|
} |
|
|
|
static irqreturn_t davinci_musb_interrupt(int irq, void *__hci) |
|
{ |
|
unsigned long flags; |
|
irqreturn_t retval = IRQ_NONE; |
|
struct musb *musb = __hci; |
|
struct usb_otg *otg = musb->xceiv->otg; |
|
void __iomem *tibase = musb->ctrl_base; |
|
struct cppi *cppi; |
|
u32 tmp; |
|
|
|
spin_lock_irqsave(&musb->lock, flags); |
|
|
|
/* NOTE: DaVinci shadows the Mentor IRQs. Don't manage them through |
|
* the Mentor registers (except for setup), use the TI ones and EOI. |
|
* |
|
* Docs describe irq "vector" registers associated with the CPPI and |
|
* USB EOI registers. These hold a bitmask corresponding to the |
|
* current IRQ, not an irq handler address. Would using those bits |
|
* resolve some of the races observed in this dispatch code?? |
|
*/ |
|
|
|
/* CPPI interrupts share the same IRQ line, but have their own |
|
* mask, state, "vector", and EOI registers. |
|
*/ |
|
cppi = container_of(musb->dma_controller, struct cppi, controller); |
|
if (is_cppi_enabled(musb) && musb->dma_controller && !cppi->irq) |
|
retval = cppi_interrupt(irq, __hci); |
|
|
|
/* ack and handle non-CPPI interrupts */ |
|
tmp = musb_readl(tibase, DAVINCI_USB_INT_SRC_MASKED_REG); |
|
musb_writel(tibase, DAVINCI_USB_INT_SRC_CLR_REG, tmp); |
|
dev_dbg(musb->controller, "IRQ %08x\n", tmp); |
|
|
|
musb->int_rx = (tmp & DAVINCI_USB_RXINT_MASK) |
|
>> DAVINCI_USB_RXINT_SHIFT; |
|
musb->int_tx = (tmp & DAVINCI_USB_TXINT_MASK) |
|
>> DAVINCI_USB_TXINT_SHIFT; |
|
musb->int_usb = (tmp & DAVINCI_USB_USBINT_MASK) |
|
>> DAVINCI_USB_USBINT_SHIFT; |
|
|
|
/* DRVVBUS irqs are the only proxy we have (a very poor one!) for |
|
* DaVinci'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 we know its |
|
* value, but DEVCTL.BDEVICE is invalid without DEVCTL.SESSION set. |
|
* Also, DRVVBUS pulses for SRP (but not at 5V) ... |
|
*/ |
|
if (tmp & (DAVINCI_INTR_DRVVBUS << DAVINCI_USB_USBINT_SHIFT)) { |
|
int drvvbus = musb_readl(tibase, DAVINCI_USB_STAT_REG); |
|
void __iomem *mregs = musb->mregs; |
|
u8 devctl = musb_readb(mregs, MUSB_DEVCTL); |
|
int err = musb->int_usb & MUSB_INTR_VBUSERROR; |
|
|
|
err = musb->int_usb & MUSB_INTR_VBUSERROR; |
|
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 (on EVM, a **long** time) for VBUS |
|
* to stop registering in devctl. |
|
*/ |
|
musb->int_usb &= ~MUSB_INTR_VBUSERROR; |
|
musb->xceiv->otg->state = OTG_STATE_A_WAIT_VFALL; |
|
mod_timer(&musb->dev_timer, jiffies + POLL_SECONDS * HZ); |
|
WARNING("VBUS error workaround (delay coming)\n"); |
|
} else if (drvvbus) { |
|
MUSB_HST_MODE(musb); |
|
musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE; |
|
portstate(musb->port1_status |= USB_PORT_STAT_POWER); |
|
del_timer(&musb->dev_timer); |
|
} else { |
|
musb->is_active = 0; |
|
MUSB_DEV_MODE(musb); |
|
musb->xceiv->otg->state = OTG_STATE_B_IDLE; |
|
portstate(musb->port1_status &= ~USB_PORT_STAT_POWER); |
|
} |
|
|
|
/* NOTE: this must complete poweron within 100 msec |
|
* (OTG_TIME_A_WAIT_VRISE) but we don't check for that. |
|
*/ |
|
davinci_musb_source_power(musb, drvvbus, 0); |
|
dev_dbg(musb->controller, "VBUS %s (%s)%s, devctl %02x\n", |
|
drvvbus ? "on" : "off", |
|
usb_otg_state_string(musb->xceiv->otg->state), |
|
err ? " ERROR" : "", |
|
devctl); |
|
retval = IRQ_HANDLED; |
|
} |
|
|
|
if (musb->int_tx || musb->int_rx || musb->int_usb) |
|
retval |= musb_interrupt(musb); |
|
|
|
/* irq stays asserted until EOI is written */ |
|
musb_writel(tibase, DAVINCI_USB_EOI_REG, 0); |
|
|
|
/* poll for ID change */ |
|
if (musb->xceiv->otg->state == OTG_STATE_B_IDLE) |
|
mod_timer(&musb->dev_timer, jiffies + POLL_SECONDS * HZ); |
|
|
|
spin_unlock_irqrestore(&musb->lock, flags); |
|
|
|
return retval; |
|
} |
|
|
|
static int davinci_musb_set_mode(struct musb *musb, u8 mode) |
|
{ |
|
/* EVM can't do this (right?) */ |
|
return -EIO; |
|
} |
|
|
|
static int davinci_musb_init(struct musb *musb) |
|
{ |
|
void __iomem *tibase = musb->ctrl_base; |
|
u32 revision; |
|
int ret = -ENODEV; |
|
|
|
musb->xceiv = usb_get_phy(USB_PHY_TYPE_USB2); |
|
if (IS_ERR_OR_NULL(musb->xceiv)) { |
|
ret = -EPROBE_DEFER; |
|
goto unregister; |
|
} |
|
|
|
musb->mregs += DAVINCI_BASE_OFFSET; |
|
|
|
/* returns zero if e.g. not clocked */ |
|
revision = musb_readl(tibase, DAVINCI_USB_VERSION_REG); |
|
if (revision == 0) |
|
goto fail; |
|
|
|
timer_setup(&musb->dev_timer, otg_timer, 0); |
|
|
|
davinci_musb_source_power(musb, 0, 1); |
|
|
|
/* dm355 EVM swaps D+/D- for signal integrity, and |
|
* is clocked from the main 24 MHz crystal. |
|
*/ |
|
if (machine_is_davinci_dm355_evm()) { |
|
u32 phy_ctrl = __raw_readl(USB_PHY_CTRL); |
|
|
|
phy_ctrl &= ~(3 << 9); |
|
phy_ctrl |= USBPHY_DATAPOL; |
|
__raw_writel(phy_ctrl, USB_PHY_CTRL); |
|
} |
|
|
|
/* On dm355, the default-A state machine needs DRVVBUS control. |
|
* If we won't be a host, there's no need to turn it on. |
|
*/ |
|
if (cpu_is_davinci_dm355()) { |
|
u32 deepsleep = __raw_readl(DM355_DEEPSLEEP); |
|
|
|
deepsleep &= ~DRVVBUS_FORCE; |
|
__raw_writel(deepsleep, DM355_DEEPSLEEP); |
|
} |
|
|
|
/* reset the controller */ |
|
musb_writel(tibase, DAVINCI_USB_CTRL_REG, 0x1); |
|
|
|
/* 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("DaVinci OTG revision %08x phy %03x control %02x\n", |
|
revision, __raw_readl(USB_PHY_CTRL), |
|
musb_readb(tibase, DAVINCI_USB_CTRL_REG)); |
|
|
|
musb->isr = davinci_musb_interrupt; |
|
return 0; |
|
|
|
fail: |
|
usb_put_phy(musb->xceiv); |
|
unregister: |
|
usb_phy_generic_unregister(); |
|
return ret; |
|
} |
|
|
|
static int davinci_musb_exit(struct musb *musb) |
|
{ |
|
int maxdelay = 30; |
|
u8 devctl, warn = 0; |
|
|
|
del_timer_sync(&musb->dev_timer); |
|
|
|
/* force VBUS off */ |
|
if (cpu_is_davinci_dm355()) { |
|
u32 deepsleep = __raw_readl(DM355_DEEPSLEEP); |
|
|
|
deepsleep &= ~DRVVBUS_FORCE; |
|
deepsleep |= DRVVBUS_OVERRIDE; |
|
__raw_writel(deepsleep, DM355_DEEPSLEEP); |
|
} |
|
|
|
davinci_musb_source_power(musb, 0 /*off*/, 1); |
|
|
|
/* |
|
* delay, to avoid problems with module reload. |
|
* if there's no peripheral connected, this can take a |
|
* long time to fall, especially on EVM with huge C133. |
|
*/ |
|
do { |
|
devctl = musb_readb(musb->mregs, MUSB_DEVCTL); |
|
if (!(devctl & MUSB_DEVCTL_VBUS)) |
|
break; |
|
if ((devctl & MUSB_DEVCTL_VBUS) != warn) { |
|
warn = devctl & MUSB_DEVCTL_VBUS; |
|
dev_dbg(musb->controller, "VBUS %d\n", |
|
warn >> MUSB_DEVCTL_VBUS_SHIFT); |
|
} |
|
msleep(1000); |
|
maxdelay--; |
|
} while (maxdelay > 0); |
|
|
|
/* in OTG mode, another host might be connected */ |
|
if (devctl & MUSB_DEVCTL_VBUS) |
|
dev_dbg(musb->controller, "VBUS off timeout (devctl %02x)\n", devctl); |
|
|
|
phy_off(); |
|
|
|
usb_put_phy(musb->xceiv); |
|
|
|
return 0; |
|
} |
|
|
|
static const struct musb_platform_ops davinci_ops = { |
|
.quirks = MUSB_DMA_CPPI, |
|
.init = davinci_musb_init, |
|
.exit = davinci_musb_exit, |
|
|
|
#ifdef CONFIG_USB_TI_CPPI_DMA |
|
.dma_init = cppi_dma_controller_create, |
|
.dma_exit = cppi_dma_controller_destroy, |
|
#endif |
|
.enable = davinci_musb_enable, |
|
.disable = davinci_musb_disable, |
|
|
|
.set_mode = davinci_musb_set_mode, |
|
|
|
.set_vbus = davinci_musb_set_vbus, |
|
}; |
|
|
|
static const struct platform_device_info davinci_dev_info = { |
|
.name = "musb-hdrc", |
|
.id = PLATFORM_DEVID_AUTO, |
|
.dma_mask = DMA_BIT_MASK(32), |
|
}; |
|
|
|
static int davinci_probe(struct platform_device *pdev) |
|
{ |
|
struct resource musb_resources[3]; |
|
struct musb_hdrc_platform_data *pdata = dev_get_platdata(&pdev->dev); |
|
struct platform_device *musb; |
|
struct davinci_glue *glue; |
|
struct platform_device_info pinfo; |
|
struct clk *clk; |
|
|
|
int ret = -ENOMEM; |
|
|
|
glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL); |
|
if (!glue) |
|
goto err0; |
|
|
|
clk = devm_clk_get(&pdev->dev, "usb"); |
|
if (IS_ERR(clk)) { |
|
dev_err(&pdev->dev, "failed to get clock\n"); |
|
ret = PTR_ERR(clk); |
|
goto err0; |
|
} |
|
|
|
ret = clk_enable(clk); |
|
if (ret) { |
|
dev_err(&pdev->dev, "failed to enable clock\n"); |
|
goto err0; |
|
} |
|
|
|
glue->dev = &pdev->dev; |
|
glue->clk = clk; |
|
|
|
pdata->platform_ops = &davinci_ops; |
|
|
|
glue->vbus = devm_gpiod_get_optional(&pdev->dev, NULL, GPIOD_OUT_LOW); |
|
if (IS_ERR(glue->vbus)) { |
|
ret = PTR_ERR(glue->vbus); |
|
goto err0; |
|
} else { |
|
glue->vbus_state = -1; |
|
INIT_WORK(&glue->vbus_work, evm_deferred_drvvbus); |
|
} |
|
|
|
usb_phy_generic_register(); |
|
platform_set_drvdata(pdev, glue); |
|
|
|
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; |
|
|
|
/* |
|
* For DM6467 3 resources are passed. A placeholder for the 3rd |
|
* resource is always there, so it's safe to always copy it... |
|
*/ |
|
musb_resources[2].name = pdev->resource[2].name; |
|
musb_resources[2].start = pdev->resource[2].start; |
|
musb_resources[2].end = pdev->resource[2].end; |
|
musb_resources[2].flags = pdev->resource[2].flags; |
|
|
|
pinfo = davinci_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); |
|
goto err1; |
|
} |
|
|
|
return 0; |
|
|
|
err1: |
|
clk_disable(clk); |
|
|
|
err0: |
|
return ret; |
|
} |
|
|
|
static int davinci_remove(struct platform_device *pdev) |
|
{ |
|
struct davinci_glue *glue = platform_get_drvdata(pdev); |
|
|
|
platform_device_unregister(glue->musb); |
|
usb_phy_generic_unregister(); |
|
clk_disable(glue->clk); |
|
|
|
return 0; |
|
} |
|
|
|
static struct platform_driver davinci_driver = { |
|
.probe = davinci_probe, |
|
.remove = davinci_remove, |
|
.driver = { |
|
.name = "musb-davinci", |
|
}, |
|
}; |
|
|
|
MODULE_DESCRIPTION("DaVinci MUSB Glue Layer"); |
|
MODULE_AUTHOR("Felipe Balbi <[email protected]>"); |
|
MODULE_LICENSE("GPL v2"); |
|
module_platform_driver(davinci_driver);
|
|
|