static int dwc3_omap_extcon_register(struct dwc3_omap *omap)
{
int ret;
struct device_node *node = omap->dev->of_node;
struct extcon_dev *edev;
if (of_property_read_bool(node, "extcon")) {
edev = extcon_get_edev_by_phandle(omap->dev, 0);
if (IS_ERR(edev)) {
dev_vdbg(omap->dev, "couldn't get extcon device\n");
return -EPROBE_DEFER;
}
omap->vbus_nb.notifier_call = dwc3_omap_vbus_notifier;
ret = extcon_register_interest(&omap->extcon_vbus_dev,
edev->name, "USB",
&omap->vbus_nb);
if (ret < 0)
dev_vdbg(omap->dev, "failed to register notifier for USB\n");
omap->id_nb.notifier_call = dwc3_omap_id_notifier;
ret = extcon_register_interest(&omap->extcon_id_dev,
edev->name, "USB-HOST",
&omap->id_nb);
if (ret < 0)
dev_vdbg(omap->dev, "failed to register notifier for USB-HOST\n");
if (extcon_get_cable_state(edev, "USB") == true)
dwc3_omap_set_mailbox(omap, OMAP_DWC3_VBUS_VALID);
if (extcon_get_cable_state(edev, "USB-HOST") == true)
dwc3_omap_set_mailbox(omap, OMAP_DWC3_ID_GROUND);
}
return 0;
}
static int omap_otg_probe(struct platform_device *pdev)
{
const struct omap_usb_config *config = pdev->dev.platform_data;
struct otg_device *otg_dev;
struct extcon_dev *extcon;
int ret;
u32 rev;
if (!config || !config->extcon)
return -ENODEV;
extcon = extcon_get_extcon_dev(config->extcon);
if (!extcon)
return -EPROBE_DEFER;
otg_dev = devm_kzalloc(&pdev->dev, sizeof(*otg_dev), GFP_KERNEL);
if (!otg_dev)
return -ENOMEM;
otg_dev->base = devm_ioremap_resource(&pdev->dev, &pdev->resource[0]);
if (IS_ERR(otg_dev->base))
return PTR_ERR(otg_dev->base);
otg_dev->id_nb.notifier_call = omap_otg_id_notifier;
otg_dev->vbus_nb.notifier_call = omap_otg_vbus_notifier;
ret = extcon_register_interest(&otg_dev->id_dev, config->extcon,
"USB-HOST", &otg_dev->id_nb);
if (ret)
return ret;
ret = extcon_register_interest(&otg_dev->vbus_dev, config->extcon,
"USB", &otg_dev->vbus_nb);
if (ret) {
extcon_unregister_interest(&otg_dev->id_dev);
return ret;
}
otg_dev->id = extcon_get_cable_state(extcon, "USB-HOST");
otg_dev->vbus = extcon_get_cable_state(extcon, "USB");
omap_otg_set_mode(otg_dev);
rev = readl(otg_dev->base);
dev_info(&pdev->dev,
"OMAP USB OTG controller rev %d.%d (%s, id=%d, vbus=%d)\n",
(rev >> 4) & 0xf, rev & 0xf, config->extcon, otg_dev->id,
otg_dev->vbus);
return 0;
}
/*
* hotplug
*/
static void usbhsc_hotplug(struct usbhs_priv *priv)
{
struct platform_device *pdev = usbhs_priv_to_pdev(priv);
struct usbhs_mod *mod = usbhs_mod_get_current(priv);
int id;
int enable;
int cable;
int ret;
/*
* get vbus status from platform
*/
enable = usbhs_platform_call(priv, get_vbus, pdev);
/*
* get id from platform
*/
id = usbhs_platform_call(priv, get_id, pdev);
if (enable && !mod) {
if (priv->edev) {
cable = extcon_get_cable_state(priv->edev, "USB-HOST");
if ((cable > 0 && id != USBHS_HOST) ||
(!cable && id != USBHS_GADGET)) {
dev_info(&pdev->dev,
"USB cable plugged in doesn't match the selected role!\n");
return;
}
}
ret = usbhs_mod_change(priv, id);
if (ret < 0)
return;
dev_dbg(&pdev->dev, "%s enable\n", __func__);
/* power on */
if (usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
usbhsc_power_ctrl(priv, enable);
/* bus init */
usbhsc_set_buswait(priv);
usbhsc_bus_init(priv);
/* module start */
usbhs_mod_call(priv, start, priv);
} else if (!enable && mod) {
dev_dbg(&pdev->dev, "%s disable\n", __func__);
/* module stop */
usbhs_mod_call(priv, stop, priv);
/* bus init */
usbhsc_bus_init(priv);
/* power off */
if (usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
usbhsc_power_ctrl(priv, enable);
usbhs_mod_change(priv, -1);
/* reset phy for next connection */
usbhs_platform_call(priv, phy_reset, pdev);
}
}
static int dwc3_omap_probe(struct platform_device *pdev)
{
struct device_node *node = pdev->dev.of_node;
struct dwc3_omap *omap;
struct resource *res;
struct device *dev = &pdev->dev;
struct extcon_dev *edev;
struct regulator *vbus_reg = NULL;
int ret = -ENOMEM;
int irq;
int utmi_mode = 0;
int x_major;
u32 reg;
void __iomem *base;
if (!node) {
dev_err(dev, "device node not found\n");
return -EINVAL;
}
omap = devm_kzalloc(dev, sizeof(*omap), GFP_KERNEL);
if (!omap) {
dev_err(dev, "not enough memory\n");
return -ENOMEM;
}
platform_set_drvdata(pdev, omap);
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
dev_err(dev, "missing IRQ resource\n");
return -EINVAL;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(dev, "missing memory base resource\n");
return -EINVAL;
}
base = devm_ioremap_resource(dev, res);
if (IS_ERR(base))
return PTR_ERR(base);
if (of_property_read_bool(node, "vbus-supply")) {
vbus_reg = devm_regulator_get(dev, "vbus");
if (IS_ERR(vbus_reg)) {
dev_err(dev, "vbus init failed\n");
return PTR_ERR(vbus_reg);
}
}
omap->dev = dev;
omap->irq = irq;
omap->base = base;
omap->vbus_reg = vbus_reg;
dev->dma_mask = &dwc3_omap_dma_mask;
pm_runtime_enable(dev);
ret = pm_runtime_get_sync(dev);
if (ret < 0) {
dev_err(dev, "get_sync failed with err %d\n", ret);
goto err0;
}
reg = dwc3_omap_readl(omap->base, USBOTGSS_REVISION);
omap->revision = reg;
x_major = USBOTGSS_REVISION_XMAJOR(reg);
/* Differentiate between OMAP5 and AM437x */
switch (x_major) {
case USBOTGSS_REVISION_XMAJOR1:
case USBOTGSS_REVISION_XMAJOR2:
omap->irq_eoi_offset = 0;
omap->irq0_offset = 0;
omap->irqmisc_offset = 0;
omap->utmi_otg_offset = 0;
omap->debug_offset = 0;
break;
default:
/* Default to the latest revision */
omap->irq_eoi_offset = USBOTGSS_EOI_OFFSET;
omap->irq0_offset = USBOTGSS_IRQ0_OFFSET;
omap->irqmisc_offset = USBOTGSS_IRQMISC_OFFSET;
omap->utmi_otg_offset = USBOTGSS_UTMI_OTG_OFFSET;
omap->debug_offset = USBOTGSS_DEBUG_OFFSET;
break;
}
/* For OMAP5(ES2.0) and AM437x x_major is 2 even though there are
* changes in wrapper registers, Using dt compatible for aegis
*/
if (of_device_is_compatible(node, "ti,am437x-dwc3")) {
omap->irq_eoi_offset = USBOTGSS_EOI_OFFSET;
omap->irq0_offset = USBOTGSS_IRQ0_OFFSET;
omap->irqmisc_offset = USBOTGSS_IRQMISC_OFFSET;
omap->utmi_otg_offset = USBOTGSS_UTMI_OTG_OFFSET;
omap->debug_offset = USBOTGSS_DEBUG_OFFSET;
}
reg = dwc3_omap_read_utmi_status(omap);
of_property_read_u32(node, "utmi-mode", &utmi_mode);
switch (utmi_mode) {
case DWC3_OMAP_UTMI_MODE_SW:
reg |= USBOTGSS_UTMI_OTG_STATUS_SW_MODE;
break;
case DWC3_OMAP_UTMI_MODE_HW:
reg &= ~USBOTGSS_UTMI_OTG_STATUS_SW_MODE;
break;
default:
dev_dbg(dev, "UNKNOWN utmi mode %d\n", utmi_mode);
}
dwc3_omap_write_utmi_status(omap, reg);
/* check the DMA Status */
reg = dwc3_omap_readl(omap->base, USBOTGSS_SYSCONFIG);
omap->dma_status = !!(reg & USBOTGSS_SYSCONFIG_DMADISABLE);
ret = devm_request_irq(dev, omap->irq, dwc3_omap_interrupt, 0,
"dwc3-omap", omap);
if (ret) {
dev_err(dev, "failed to request IRQ #%d --> %d\n",
omap->irq, ret);
goto err1;
}
dwc3_omap_enable_irqs(omap);
if (of_property_read_bool(node, "extcon")) {
edev = of_extcon_get_extcon_dev(dev, 0);
if (IS_ERR(edev)) {
dev_vdbg(dev, "couldn't get extcon device\n");
ret = -EPROBE_DEFER;
goto err2;
}
omap->vbus_nb.notifier_call = dwc3_omap_vbus_notifier;
ret = extcon_register_interest(&omap->extcon_vbus_dev,
edev->name, "USB", &omap->vbus_nb);
if (ret < 0)
dev_vdbg(dev, "failed to register notifier for USB\n");
omap->id_nb.notifier_call = dwc3_omap_id_notifier;
ret = extcon_register_interest(&omap->extcon_id_dev, edev->name,
"USB-HOST", &omap->id_nb);
if (ret < 0)
dev_vdbg(dev,
"failed to register notifier for USB-HOST\n");
if (extcon_get_cable_state(edev, "USB") == true)
dwc3_omap_set_mailbox(omap, OMAP_DWC3_VBUS_VALID);
if (extcon_get_cable_state(edev, "USB-HOST") == true)
dwc3_omap_set_mailbox(omap, OMAP_DWC3_ID_GROUND);
}
ret = of_platform_populate(node, NULL, NULL, dev);
if (ret) {
dev_err(&pdev->dev, "failed to create dwc3 core\n");
goto err3;
}
return 0;
err3:
if (omap->extcon_vbus_dev.edev)
extcon_unregister_interest(&omap->extcon_vbus_dev);
if (omap->extcon_id_dev.edev)
extcon_unregister_interest(&omap->extcon_id_dev);
err2:
dwc3_omap_disable_irqs(omap);
err1:
pm_runtime_put_sync(dev);
err0:
pm_runtime_disable(dev);
return ret;
}
