// SPDX-License-Identifier: GPL-2.0
/*
* Texas Instruments DSPS platforms "glue layer"
*
* Copyright (C) 2012, by Texas Instruments
*
* Based on the am35x "glue layer" code.
*
* This file is part of the Inventra Controller Driver for Linux.
*
* musb_dsps.c will be a common file for all the TI DSPS platforms
* such as dm64x, dm36x, dm35x, da8x, am35x and ti81x.
* For now only ti81x is using this and in future davinci.c, am35x.c
* da8xx.c would be merged to this file after testing.
*/
#include <linux/io.h>
#include <linux/irq.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/pm_runtime.h>
#include <linux/module.h>
#include <linux/usb/usb_phy_generic.h>
#include <linux/platform_data/usb-omap.h>
#include <linux/sizes.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/usb/of.h>
#include <linux/debugfs.h>
#include "musb_core.h"
static const struct of_device_id musb_dsps_of_match[];
/*
* DSPS musb wrapper register offset.
* FIXME: This should be expanded to have all the wrapper registers from TI DSPS
* musb ips.
*/
struct dsps_musb_wrapper {
u16 revision;
u16 control;
u16 status;
u16 epintr_set;
u16 epintr_clear;
u16 epintr_status;
u16 coreintr_set;
u16 coreintr_clear;
u16 coreintr_status;
u16 phy_utmi;
u16 mode;
u16 tx_mode;
u16 rx_mode;
/* bit positions for control */
unsigned reset:5;
/* bit positions for interrupt */
unsigned usb_shift:5;
u32 usb_mask;
u32 usb_bitmap;
unsigned drvvbus:5;
unsigned txep_shift:5;
u32 txep_mask;
u32 txep_bitmap;
unsigned rxep_shift:5;
u32 rxep_mask;
u32 rxep_bitmap;
/* bit positions for phy_utmi */
unsigned otg_disable:5;
/* bit positions for mode */
unsigned iddig:5;
unsigned iddig_mux:5;
/* miscellaneous stuff */
unsigned poll_timeout;
};
/*
* register shadow for suspend
*/
struct dsps_context {
u32 control;
u32 epintr;
u32 coreintr;
u32 phy_utmi;
u32 mode;
u32 tx_mode;
u32 rx_mode;
};
/*
* DSPS glue structure.
*/
struct dsps_glue {
struct device *dev;
struct platform_device *musb; /* child musb pdev */
const struct dsps_musb_wrapper *wrp; /* wrapper register offsets */
int vbus_irq; /* optional vbus irq */
unsigned long last_timer; /* last timer data for each instance */
bool sw_babble_enabled;
void __iomem *usbss_base;
struct dsps_context context;
struct debugfs_regset32 regset;
struct dentry *dbgfs_root;
};
static const struct debugfs_reg32 dsps_musb_regs[] = {
{ "revision", 0x00 },
{ "control", 0x14 },
{ "status", 0x18 },
{ "eoi", 0x24 },
{ "intr0_stat", 0x30 },
{ "intr1_stat", 0x34 },
{ "intr0_set", 0x38 },
{ "intr1_set", 0x3c },
{ "txmode", 0x70 },
{ "rxmode", 0x74 },
{ "autoreq", 0xd0 },
{ "srpfixtime", 0xd4 },
{ "tdown", 0xd8 },
{ "phy_utmi", 0xe0 },
{ "mode", 0xe8 },
};
static void dsps_mod_timer(struct dsps_glue *glue, int wait_ms)
{
struct musb *musb = platform_get_drvdata(glue->musb);
int wait;
if (wait_ms < 0)
wait = msecs_to_jiffies(glue->wrp->poll_timeout);
else
wait = msecs_to_jiffies(wait_ms);
mod_timer(&musb->dev_timer, jiffies + wait);
}
/*
* If no vbus irq from the PMIC is configured, we need to poll VBUS status.
*/
static void dsps_mod_timer_optional(struct dsps_glue *glue)
{
if (glue->vbus_irq)
return;
dsps_mod_timer(glue, -1);
}
/* USBSS / USB AM335x */
#define USBSS_IRQ_STATUS 0x28
#define USBSS_IRQ_ENABLER 0x2c
#define USBSS_IRQ_CLEARR 0x30
#define USBSS_IRQ_PD_COMP (1 << 2)
/*
* dsps_musb_enable - enable interrupts
*/
static void dsps_musb_enable(struct musb *musb)
{
struct device *dev = musb->controller;
struct dsps_glue *glue = dev_get_drvdata(dev->parent);
const struct dsps_musb_wrapper *wrp = glue->wrp;
void __iomem *reg_base = musb->ctrl_base;
u32 epmask, coremask;
/* Workaround: setup IRQs through both register sets. */
epmask = ((musb->epmask & wrp->txep_mask) << wrp->txep_shift) |
((musb->epmask & wrp->rxep_mask) << wrp->rxep_shift);
coremask = (wrp->usb_bitmap & ~MUSB_INTR_SOF);
musb_writel(reg_base, wrp->epintr_set, epmask);
musb_writel(reg_base, wrp->coreintr_set, coremask);
/*
* start polling for runtime PM active and idle,
* and for ID change in dual-role idle mode.
*/
if (musb->xceiv->otg->state == OTG_STATE_B_IDLE)
dsps_mod_timer(glue, -1);
}
/*
* dsps_musb_disable - disable HDRC and flush interrupts
*/
static void dsps_musb_disable(struct musb *musb)
{
struct device *dev = musb->controller;
struct dsps_glue *glue = dev_get_drvdata(dev->parent);
const struct dsps_musb_wrapper *wrp = glue->wrp;
void __iomem *reg_base = musb->ctrl_base;
musb_writel(reg_base, wrp->coreintr_clear, wrp->usb_bitmap);
musb_writel(reg_base, wrp->epintr_clear,
wrp->txep_bitmap | wrp->rxep_bitmap);
del_timer_sync(&musb->dev_timer);
}
/* Caller must take musb->lock */
static int dsps_check_status(struct musb *musb, void *unused)
{
void __iomem *mregs = musb->mregs;
struct device *dev = musb->controller;
struct dsps_glue *glue = dev_get_drvdata(dev->parent);
const struct dsps_musb_wrapper *wrp = glue->wrp;
u8 devctl;
int skip_session = 0;
if (glue->vbus_irq)
del_timer(&musb->dev_timer);
/*
* We poll because DSPS IP'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));
switch (musb->xceiv->otg->state) {
case OTG_STATE_A_WAIT_VRISE:
if (musb->port_mode == MUSB_HOST) {
musb->xceiv->otg->state = OTG_STATE_A_WAIT_BCON;
dsps_mod_timer_optional(glue);
break;
}
fallthrough;
case OTG_STATE_A_WAIT_BCON:
/* keep VBUS on for host-only mode */
if (musb->port_mode == MUSB_HOST) {
dsps_mod_timer_optional(glue);
break;
}
musb_writeb(musb->mregs, MUSB_DEVCTL, 0);
skip_session = 1;
fallthrough;
case OTG_STATE_A_IDLE:
case OTG_STATE_B_IDLE:
if (!glue->vbus_irq) {
if (devctl & MUSB_DEVCTL_BDEVICE) {
musb->xceiv->otg->state = OTG_STATE_B_IDLE;
MUSB_DEV_MODE(musb);
} else {
musb->xceiv->otg->state = OTG_STATE_A_IDLE;
MUSB_HST_MODE(musb);
}
if (musb->port_mode == MUSB_PERIPHERAL)
skip_session = 1;
if (!(devctl & MUSB_DEVCTL_SESSION) && !skip_session)
musb_writeb(mregs, MUSB_DEVCTL,
MUSB_DEVCTL_SESSION);
}
dsps_mod_timer_optional(glue);
break;
case OTG_STATE_A_WAIT_VFALL:
musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE;
musb_writel(musb->ctrl_base, wrp->coreintr_set,
MUSB_INTR_VBUSERROR << wrp->usb_shift);
break;
default:
break;
}
return 0;
}
static void otg_timer(struct timer_list *t)
{
struct musb *musb = from_timer(musb, t, dev_timer);
struct device *dev = musb->controller;
unsigned long flags;
int err;
err = pm_runtime_get(dev);
if ((err != -EINPROGRESS) && err < 0) {
dev_err(dev, "Poll could not pm_runtime_get: %i\n", err);
pm_runtime_put_noidle(dev);
return;
}
spin_lock_irqsave(&musb->lock, flags);
err = musb_queue_resume_work(musb, dsps_check_status, NULL);
if (err < 0)
dev_err(dev, "%s resume work: %i\n", __func__, err);
spin_unlock_irqrestore(&musb->lock, flags);
pm_runtime_mark_last_busy(dev);
pm_runtime_put_autosuspend(dev);
}
static void dsps_musb_clear_ep_rxintr(struct musb *musb, int epnum)
{
u32 epintr;
struct dsps_glue *glue = dev_get_drvdata(musb->controller->parent);
const struct dsps_musb_wrapper *wrp = glue->wrp;
/* musb->lock might already been held */
epintr = (1 << epnum) << wrp->rxep_shift;
musb_writel(musb->ctrl_base, wrp->epintr_status, epintr);
}
static irqreturn_t dsps_interrupt(int irq, void *hci)
{
struct musb *musb = hci;
void __iomem *reg_base = musb->ctrl_base;
struct device *dev = musb->controller;
struct dsps_glue *glue = dev_get_drvdata(dev->parent);
const struct dsps_musb_wrapper *wrp = glue->wrp;
unsigned long flags;
irqreturn_t ret = IRQ_NONE;
u32 epintr, usbintr;
spin_lock_irqsave(&musb->lock, flags);
/* Get endpoint interrupts */
epintr = musb_readl(reg_base, wrp->epintr_status);
musb->int_rx = (epintr & wrp->rxep_bitmap) >> wrp->rxep_shift;
musb->int_tx = (epintr & wrp->txep_bitmap) >> wrp->txep_shift;
if (epintr)
musb_writel(reg_base, wrp->epintr_status, epintr);
/* Get usb core interrupts */
usbintr = musb_readl(reg_base, wrp->coreintr_status);
if (!usbintr && !epintr)
goto out;
musb->int_usb = (usbintr & wrp->usb_bitmap) >> wrp->usb_shift;
if (usbintr)
musb_writel(reg_base, wrp->coreintr_status, usbintr);
dev_dbg(musb->controller, "usbintr (%x) epintr(%x)\n",
usbintr, epintr);
if (usbintr & ((1 << wrp->drvvbus) << wrp->usb_shift)) {
int drvvbus = musb_readl(reg_base, wrp->status);
void __iomem *mregs = musb->mregs;
u8 devctl = musb_readb(mregs, MUSB_DEVCTL);
int err;
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 for VBUS to stop registering in
* devctl.
*/
musb->int_usb &= ~MUSB_INTR_VBUSERROR;
musb->xceiv->otg->state = OTG_STATE_A_WAIT_VFALL;
dsps_mod_timer_optional(glue);
WARNING("VBUS error workaround (delay coming)\n");
} else if (drvvbus) {
MUSB_HST_MODE(musb);
musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE;
dsps_mod_timer_optional(glue);
} else {
musb->is_active = 0;
MUSB_DEV_MODE(musb);
musb->xceiv->otg->state = OTG_STATE_B_IDLE;
}
/* NOTE: this must complete power-on within 100 ms. */
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);
ret = IRQ_HANDLED;
}
if (musb->int_tx || musb->int_rx || musb->int_usb)
ret |= musb_interrupt(musb);
/* Poll for ID change and connect */
switch (musb->xceiv->otg->state) {
case OTG_STATE_B_IDLE:
case OTG_STATE_A_WAIT_BCON:
dsps_mod_timer_optional(glue);
break;
default:
break;
}
out:
spin_unlock_irqrestore(&musb->lock, flags);
return ret;
}
static int dsps_musb_dbg_init(struct musb *musb, struct dsps_glue *glue)
{
struct dentry *root;
char buf[128];
sprintf(buf, "%s.dsps", dev_name(musb->controller));
root = debugfs_create_dir(buf, usb_debug_root);
glue->dbgfs_root = root;
glue->regset.regs = dsps_musb_regs;
glue->regset.nregs = ARRAY_SIZE(dsps_musb_regs);
glue->regset.base = musb->ctrl_base;
debugfs_create_regset32("regdump", S_IRUGO, root, &glue->regset);
return 0;
}
static int dsps_musb_init(struct musb *musb)
{
struct device *dev = musb->controller;
struct dsps_glue *glue = dev_get_drvdata(dev->parent);
struct platform_device *parent = to_platform_device(dev->parent);
const struct dsps_musb_wrapper *wrp = glue->wrp;
void __iomem *reg_base;
struct resource *r;
u32 rev, val;
int ret;
r = platform_get_resource_byname(parent, IORESOURCE_MEM, "control");
reg_base = devm_ioremap_resource(dev, r);
if (IS_ERR(reg_base))
return PTR_ERR(reg_base);
musb->ctrl_base = reg_base;
/* NOP driver needs change if supporting dual instance */
musb->xceiv = devm_usb_get_phy_by_phandle(dev->parent, "phys", 0);
if (IS_ERR(musb->xceiv))
return PTR_ERR(musb->xceiv);
musb->phy = devm_phy_get(dev->parent, "usb2-phy");
/* Returns zero if e.g. not clocked */
rev = musb_readl(reg_base, wrp->revision);
if (!rev)
return -ENODEV;
if (IS_ERR(musb->phy)) {
musb->phy = NULL;
} else {
ret = phy_init(musb->phy);
if (ret < 0)
return ret;
ret = phy_power_on(musb->phy);
if (ret) {
phy_exit(musb->phy);
return ret;
}
}
timer_setup(&musb->dev_timer, otg_timer, 0);
/* Reset the musb */
musb_writel(reg_base, wrp->control, (1 << wrp->reset));
musb->isr = dsps_interrupt;
/* reset the otgdisable bit, needed for host mode to work */
val = musb_readl(reg_base, wrp->phy_utmi);
val &= ~(1 << wrp->otg_disable);
musb_writel(musb->ctrl_base, wrp->phy_utmi, val);
/*
* Check whether the dsps version has babble control enabled.
* In latest silicon revision the babble control logic is enabled.
* If MUSB_BABBLE_CTL returns 0x4 then we have the babble control
* logic enabled.
*/
val = musb_readb(musb->mregs, MUSB_BABBLE_CTL);
if (val & MUSB_BABBLE_RCV_DISABLE) {
glue->sw_babble_enabled = true;
val |= MUSB_BABBLE_SW_SESSION_CTRL;
musb_writeb(musb->mregs, MUSB_BABBLE_CTL, val);
}
dsps_mod_timer(glue, -1);
return dsps_musb_dbg_init(musb, glue);
}
static int dsps_musb_exit(struct musb *musb)
{
struct device *dev = musb->controller;
struct dsps_glue *glue = dev_get_drvdata(dev->parent);
del_timer_sync(&musb->dev_timer);
phy_power_off(musb->phy);
phy_exit(musb->phy);
debugfs_remove_recursive(glue->dbgfs_root);
return 0;
}
static int dsps_musb_set_mode(struct musb *musb, u8 mode)
{
struct device *dev = musb->controller;
struct dsps_glue *glue = dev_get_drvdata(dev->parent);
const struct dsps_musb_wrapper *wrp = glue->wrp;
void __iomem *ctrl_base = musb->ctrl_base;
u32 reg;
reg = musb_readl(ctrl_base, wrp->mode);
switch (mode) {
case MUSB_HOST:
reg &= ~(1 << wrp->iddig);
/*
* if we're setting mode to host-only or device-only, we're
* going to ignore whatever the PHY sends us and just force
* ID pin status by SW
*/
reg |= (1 << wrp->iddig_mux);
musb_writel(ctrl_base, wrp->mode, reg);
musb_writel(ctrl_base, wrp->phy_utmi, 0x02);
break;
case MUSB_PERIPHERAL:
reg |= (1 << wrp->iddig);
/*
* if we're setting mode to host-only or device-only, we're
* going to ignore whatever the PHY sends us and just force
* ID pin status by SW
*/
reg |= (1 << wrp->iddig_mux);
musb_writel(ctrl_base, wrp->mode, reg);
break;
case MUSB_OTG:
musb_writel(ctrl_base, wrp->phy_utmi, 0x02);
break;
default:
dev_err(glue->dev, "unsupported mode %d\n", mode);
return -EINVAL;
}
return 0;
}
static bool dsps_sw_babble_control(struct musb *musb)
{
u8 babble_ctl;
bool session_restart = false;
babble_ctl = musb_readb(musb->mregs, MUSB_BABBLE_CTL);
dev_dbg(musb->controller, "babble: MUSB_BABBLE_CTL value %x\n",
babble_ctl);
/*
* check line monitor flag to check whether babble is
* due to noise
*/
dev_dbg(musb->controller, "STUCK_J is %s\n",
babble_ctl & MUSB_BABBLE_STUCK_J ? "set" : "reset");
if (babble_ctl & MUSB_BABBLE_STUCK_J) {
int timeout = 10;
/*
* babble is due to noise, then set transmit idle (d7 bit)
* to resume normal operation
*/
babble_ctl = musb_readb(musb->mregs, MUSB_BABBLE_CTL);
babble_ctl |= MUSB_BABBLE_FORCE_TXIDLE;
musb_writeb(musb->mregs, MUSB_BABBLE_CTL, babble_ctl);
/* wait till line monitor flag cleared */
dev_dbg(musb->controller, "Set TXIDLE, wait J to clear\n");
do {
babble_ctl = musb_readb(musb->mregs, MUSB_BABBLE_CTL);
udelay(1);
} while ((babble_ctl & MUSB_BABBLE_STUCK_J) && timeout--);
/* check whether stuck_at_j bit cleared */
if (babble_ctl & MUSB_BABBLE_STUCK_J) {
/*
* real babble condition has occurred
* restart the controller to start the
* session again
*/
dev_dbg(musb->controller, "J not cleared, misc (%x)\n",
babble_ctl);
session_restart = true;
}
} else {
session_restart = true;
}
return session_restart;
}
static int dsps_musb_recover(struct musb *musb)
{
struct device *dev = musb->controller;
struct dsps_glue *glue = dev_get_drvdata(dev->parent);
int session_restart = 0;
if (glue->sw_babble_enabled)
session_restart = dsps_sw_babble_control(musb);
else
session_restart = 1;
return session_restart ? 0 : -EPIPE;
}
/* Similar to am35x, dm81xx support only 32-bit read operation */
static void dsps_read_fifo32(struct musb_hw_ep *hw_ep, u16 len, u8 *dst)
{
void __iomem *fifo = hw_ep->fifo;
if (len >= 4) {
ioread32_rep(fifo, dst, len >> 2);
dst += len & ~0x03;
len &= 0x03;
}
/* Read any remaining 1 to 3 bytes */
if (len > 0) {
u32 val = musb_readl(fifo, 0);
memcpy(dst, &val, len);
}
}
#ifdef CONFIG_USB_TI_CPPI41_DMA
static void dsps_dma_controller_callback(struct dma_controller *c)
{
struct musb *musb = c->musb;
struct dsps_glue *glue = dev_get_drvdata(musb->controller->parent);
void __iomem *usbss_base = glue->usbss_base;
u32 status;
status = musb_readl(usbss_base, USBSS_IRQ_STATUS);
if (status & USBSS_IRQ_PD_COMP)
musb_writel(usbss_base, USBSS_IRQ_STATUS, USBSS_IRQ_PD_COMP);
}
static struct dma_controller *
dsps_dma_controller_create(struct musb *musb, void __iomem *base)
{
struct dma_controller *controller;
struct dsps_glue *glue = dev_get_drvdata(musb->controller->parent);
void __iomem *usbss_base = glue->usbss_base;
controller = cppi41_dma_controller_create(musb, base);
if (IS_ERR_OR_NULL(controller))
return controller;
musb_writel(usbss_base, USBSS_IRQ_ENABLER, USBSS_IRQ_PD_COMP);
controller->dma_callback = dsps_dma_controller_callback;
return controller;
}
#ifdef CONFIG_PM_SLEEP
static void dsps_dma_controller_suspend(struct dsps_glue *glue)
{
void __iomem *usbss_base = glue->usbss_base;
musb_writel(usbss_base, USBSS_IRQ_CLEARR, USBSS_IRQ_PD_COMP);
}
static void dsps_dma_controller_resume(struct dsps_glue *glue)
{
void __iomem *usbss_base = glue->usbss_base;
musb_writel(usbss_base, USBSS_IRQ_ENABLER, USBSS_IRQ_PD_COMP);
}
#endif
#else /* CONFIG_USB_TI_CPPI41_DMA */
#ifdef CONFIG_PM_SLEEP
static void dsps_dma_controller_suspend(struct dsps_glue *glue) {}
static void dsps_dma_controller_resume(struct dsps_glue *glue) {}
#endif
#endif /* CONFIG_USB_TI_CPPI41_DMA */
static struct musb_platform_ops dsps_ops = {
.quirks = MUSB_DMA_CPPI41 | MUSB_INDEXED_EP,
.init = dsps_musb_init,
.exit = dsps_musb_exit,
#ifdef CONFIG_USB_TI_CPPI41_DMA
.dma_init = dsps_dma_controller_create,
.dma_exit = cppi41_dma_controller_destroy,
#endif
.enable = dsps_musb_enable,
.disable = dsps_musb_disable,
.set_mode = dsps_musb_set_mode,
.recover = dsps_musb_recover,
.clear_ep_rxintr = dsps_musb_clear_ep_rxintr,
};
static u64 musb_dmamask = DMA_BIT_MASK(32);
static int get_int_prop(struct device_node *dn, const char *s)
{
int ret;
u32 val;
ret = of_property_read_u32(dn, s, &val);
if (ret)
return 0;
return val;
}
static int dsps_create_musb_pdev(struct dsps_glue *glue,
struct platform_device *parent)
{
struct musb_hdrc_platform_data pdata;
struct resource resources[2];
struct resource *res;
struct device *dev = &parent->dev;
struct musb_hdrc_config *config;
struct platform_device *musb;
struct device_node *dn = parent->dev.of_node;
int ret, val;
memset(resources, 0, sizeof(resources));
res = platform_get_resource_byname(parent, IORESOURCE_MEM, "mc");
if (!res) {
dev_err(dev, "failed to get memory.\n");
return -EINVAL;
}
resources[0] = *res;
ret = platform_get_irq_byname(parent, "mc");
if (ret < 0)
return ret;
resources[1].start = ret;
resources[1].end = ret;
resources[1].flags = IORESOURCE_IRQ | irq_get_trigger_type(ret);
resources[1].name = "mc";
/* allocate the child platform device */
musb = platform_device_alloc("musb-hdrc",
(resources[0].start & 0xFFF) == 0x400 ? 0 : 1);
if (!musb) {
dev_err(dev, "failed to allocate musb device\n");
return -ENOMEM;
}
musb->dev.parent = dev;
musb->dev.dma_mask = &musb_dmamask;
musb->dev.coherent_dma_mask = musb_dmamask;
device_set_of_node_from_dev(&musb->dev, &parent->dev);
glue->musb = musb;
ret = platform_device_add_resources(musb, resources,
ARRAY_SIZE(resources));
if (ret) {
dev_err(dev, "failed to add resources\n");
goto err;
}
config = devm_kzalloc(&parent->dev, sizeof(*config), GFP_KERNEL);
if (!config) {
ret = -ENOMEM;
goto err;
}
pdata.config = config;
pdata.platform_ops = &dsps_ops;
config->num_eps = get_int_prop(dn, "mentor,num-eps");
config->ram_bits = get_int_prop(dn, "mentor,ram-bits");
config->host_port_deassert_reset_at_resume = 1;
pdata.mode = musb_get_mode(dev);
/* DT keeps this entry in mA, musb expects it as per USB spec */
pdata.power = get_int_prop(dn, "mentor,power") / 2;
ret = of_property_read_u32(dn, "mentor,multipoint", &val);
if (!ret && val)
config->multipoint = true;
config->maximum_speed = usb_get_maximum_speed(&parent->dev);
switch (config->maximum_speed) {
case USB_SPEED_LOW:
case USB_SPEED_FULL:
break;
case USB_SPEED_SUPER:
dev_warn(dev, "ignore incorrect maximum_speed "
"(super-speed) setting in dts");
fallthrough;
default:
config->maximum_speed = USB_SPEED_HIGH;
}
ret = platform_device_add_data(musb, &pdata, sizeof(pdata));
if (ret) {
dev_err(dev, "failed to add platform_data\n");
goto err;
}
ret = platform_device_add(musb);
if (ret) {
dev_err(dev, "failed to register musb device\n");
goto err;
}
return 0;
err:
platform_device_put(musb);
return ret;
}
static irqreturn_t dsps_vbus_threaded_irq(int irq, void *priv)
{
struct dsps_glue *glue = priv;
struct musb *musb = platform_get_drvdata(glue->musb);
if (!musb)
return IRQ_NONE;
dev_dbg(glue->dev, "VBUS interrupt\n");
dsps_mod_timer(glue, 0);
return IRQ_HANDLED;
}
static int dsps_setup_optional_vbus_irq(struct platform_device *pdev,
struct dsps_glue *glue)
{
int error;
glue->vbus_irq = platform_get_irq_byname(pdev, "vbus");
if (glue->vbus_irq == -EPROBE_DEFER)
return -EPROBE_DEFER;
if (glue->vbus_irq <= 0) {
glue->vbus_irq = 0;
return 0;
}
error = devm_request_threaded_irq(glue->dev, glue->vbus_irq,
NULL, dsps_vbus_threaded_irq,
IRQF_SHARED,
"vbus", glue);
if (error) {
glue->vbus_irq = 0;
return error;
}
dev_dbg(glue->dev, "VBUS irq %i configured\n", glue->vbus_irq);
return 0;
}
static int dsps_probe(struct platform_device *pdev)
{
const struct of_device_id *match;
const struct dsps_musb_wrapper *wrp;
struct dsps_glue *glue;
int ret;
if (!strcmp(pdev->name, "musb-hdrc"))
return -ENODEV;
match = of_match_node(musb_dsps_of_match, pdev->dev.of_node);
if (!match) {
dev_err(&pdev->dev, "fail to get matching of_match struct\n");
return -EINVAL;
}
wrp = match->data;
if (of_device_is_compatible(pdev->dev.of_node, "ti,musb-dm816"))
dsps_ops.read_fifo = dsps_read_fifo32;
/* allocate glue */
glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL);
if (!glue)
return -ENOMEM;
glue->dev = &pdev->dev;
glue->wrp = wrp;
glue->usbss_base = of_iomap(pdev->dev.parent->of_node, 0);
if (!glue->usbss_base)
return -ENXIO;
platform_set_drvdata(pdev, glue);
pm_runtime_enable(&pdev->dev);
ret = dsps_create_musb_pdev(glue, pdev);
if (ret)
goto err;
if (usb_get_dr_mode(&pdev->dev) == USB_DR_MODE_PERIPHERAL) {
ret = dsps_setup_optional_vbus_irq(pdev, glue);
if (ret)
goto unregister_pdev;
}
return 0;
unregister_pdev:
platform_device_unregister(glue->musb);
err:
pm_runtime_disable(&pdev->dev);
iounmap(glue->usbss_base);
return ret;
}
static void dsps_remove(struct platform_device *pdev)
{
struct dsps_glue *glue = platform_get_drvdata(pdev);
platform_device_unregister(glue->musb);
pm_runtime_disable(&pdev->dev);
iounmap(glue->usbss_base);
}
static const struct dsps_musb_wrapper am33xx_driver_data = {
.revision = 0x00,
.control = 0x14,
.status = 0x18,
.epintr_set = 0x38,
.epintr_clear = 0x40,
.epintr_status = 0x30,
.coreintr_set = 0x3c,
.coreintr_clear = 0x44,
.coreintr_status = 0x34,
.phy_utmi = 0xe0,
.mode = 0xe8,
.tx_mode = 0x70,
.rx_mode = 0x74,
.reset = 0,
.otg_disable = 21,
.iddig = 8,
.iddig_mux = 7,
.usb_shift = 0,
.usb_mask = 0x1ff,
.usb_bitmap = (0x1ff << 0),
.drvvbus = 8,
.txep_shift = 0,
.txep_mask = 0xffff,
.txep_bitmap = (0xffff << 0),
.rxep_shift = 16,
.rxep_mask = 0xfffe,
.rxep_bitmap = (0xfffe << 16),
.poll_timeout = 2000, /* ms */
};
static const struct of_device_id musb_dsps_of_match[] = {
{ .compatible = "ti,musb-am33xx",
.data = &am33xx_driver_data, },
{ .compatible = "ti,musb-dm816",
.data = &am33xx_driver_data, },
{ },
};
MODULE_DEVICE_TABLE(of, musb_dsps_of_match);
#ifdef CONFIG_PM_SLEEP
static int dsps_suspend(struct device *dev)
{
struct dsps_glue *glue = dev_get_drvdata(dev);
const struct dsps_musb_wrapper *wrp = glue->wrp;
struct musb *musb = platform_get_drvdata(glue->musb);
void __iomem *mbase;
int ret;
if (!musb)
/* This can happen if the musb device is in -EPROBE_DEFER */
return 0;
ret = pm_runtime_get_sync(dev);
if (ret < 0) {
pm_runtime_put_noidle(dev);
return ret;
}
del_timer_sync(&musb->dev_timer);
mbase = musb->ctrl_base;
glue->context.control = musb_readl(mbase, wrp->control);
glue->context.epintr = musb_readl(mbase, wrp->epintr_set);
glue->context.coreintr = musb_readl(mbase, wrp->coreintr_set);
glue->context.phy_utmi = musb_readl(mbase, wrp->phy_utmi);
glue->context.mode = musb_readl(mbase, wrp->mode);
glue->context.tx_mode = musb_readl(mbase, wrp->tx_mode);
glue->context.rx_mode = musb_readl(mbase, wrp->rx_mode);
dsps_dma_controller_suspend(glue);
return 0;
}
static int dsps_resume(struct device *dev)
{
struct dsps_glue *glue = dev_get_drvdata(dev);
const struct dsps_musb_wrapper *wrp = glue->wrp;
struct musb *musb = platform_get_drvdata(glue->musb);
void __iomem *mbase;
if (!musb)
return 0;
dsps_dma_controller_resume(glue);
mbase = musb->ctrl_base;
musb_writel(mbase, wrp->control, glue->context.control);
musb_writel(mbase, wrp->epintr_set, glue->context.epintr);
musb_writel(mbase, wrp->coreintr_set, glue->context.coreintr);
musb_writel(mbase, wrp->phy_utmi, glue->context.phy_utmi);
musb_writel(mbase, wrp->mode, glue->context.mode);
musb_writel(mbase, wrp->tx_mode, glue->context.tx_mode);
musb_writel(mbase, wrp->rx_mode, glue->context.rx_mode);
if (musb->xceiv->otg->state == OTG_STATE_B_IDLE &&
musb->port_mode == MUSB_OTG)
dsps_mod_timer(glue, -1);
pm_runtime_put(dev);
return 0;
}
#endif
static SIMPLE_DEV_PM_OPS(dsps_pm_ops, dsps_suspend, dsps_resume);
static struct platform_driver dsps_usbss_driver = {
.probe = dsps_probe,
.remove_new = dsps_remove,
.driver = {
.name = "musb-dsps",
.pm = &dsps_pm_ops,
.of_match_table = musb_dsps_of_match,
},
};
MODULE_DESCRIPTION("TI DSPS MUSB Glue Layer");
MODULE_AUTHOR("Ravi B <[email protected]>");
MODULE_AUTHOR("Ajay Kumar Gupta <[email protected]>");
MODULE_LICENSE("GPL v2");
module_platform_driver(dsps_usbss_driver);
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