static int dwc3_probe(struct platform_device *pdev)
{
struct device_node *node = pdev->dev.of_node;
struct resource *res;
struct dwc3 *dwc;
struct device *dev = &pdev->dev;
int ret = -ENOMEM;
void __iomem *regs;
void *mem;
u8 mode;
bool host_only_mode;
mem = devm_kzalloc(dev, sizeof(*dwc) + DWC3_ALIGN_MASK, GFP_KERNEL);
if (!mem) {
dev_err(dev, "not enough memory\n");
return -ENOMEM;
}
dwc = PTR_ALIGN(mem, DWC3_ALIGN_MASK + 1);
dwc->mem = mem;
dwc->notify_event = notify_event;
res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (!res) {
dev_err(dev, "missing IRQ\n");
return -ENODEV;
}
dwc->xhci_resources[1].start = res->start;
dwc->xhci_resources[1].end = res->end;
dwc->xhci_resources[1].flags = res->flags;
dwc->xhci_resources[1].name = res->name;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(dev, "missing memory resource\n");
return -ENODEV;
}
dwc->xhci_resources[0].start = res->start;
dwc->xhci_resources[0].end = dwc->xhci_resources[0].start +
DWC3_XHCI_REGS_END;
dwc->xhci_resources[0].flags = res->flags;
dwc->xhci_resources[0].name = res->name;
/*
* Request memory region but exclude xHCI regs,
* since it will be requested by the xhci-plat driver.
*/
res = devm_request_mem_region(dev, res->start + DWC3_GLOBALS_REGS_START,
resource_size(res) - DWC3_GLOBALS_REGS_START,
dev_name(dev));
if (!res) {
dev_err(dev, "can't request mem region\n");
return -ENOMEM;
}
regs = devm_ioremap_nocache(dev, res->start, resource_size(res));
if (!regs) {
dev_err(dev, "ioremap failed\n");
return -ENOMEM;
}
dwc->core_reset_after_phy_init =
of_property_read_bool(node, "core_reset_after_phy_init");
dwc->needs_fifo_resize = of_property_read_bool(node, "tx-fifo-resize");
host_only_mode = of_property_read_bool(node, "host-only-mode");
dwc->maximum_speed = of_usb_get_maximum_speed(node);
if (node) {
dwc->usb2_phy = devm_usb_get_phy_by_phandle(dev, "usb-phy", 0);
dwc->usb3_phy = devm_usb_get_phy_by_phandle(dev, "usb-phy", 1);
} else {
dwc->usb2_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
dwc->usb3_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB3);
}
/* default to superspeed if no maximum_speed passed */
if (dwc->maximum_speed == USB_SPEED_UNKNOWN)
dwc->maximum_speed = USB_SPEED_SUPER;
if (IS_ERR(dwc->usb2_phy)) {
ret = PTR_ERR(dwc->usb2_phy);
/*
* if -ENXIO is returned, it means PHY layer wasn't
* enabled, so it makes no sense to return -EPROBE_DEFER
* in that case, since no PHY driver will ever probe.
*/
if (ret == -ENXIO)
return ret;
dev_err(dev, "no usb2 phy configured\n");
return -EPROBE_DEFER;
}
if (IS_ERR(dwc->usb3_phy)) {
ret = PTR_ERR(dwc->usb2_phy);
/*
* if -ENXIO is returned, it means PHY layer wasn't
* enabled, so it makes no sense to return -EPROBE_DEFER
* in that case, since no PHY driver will ever probe.
*/
if (ret == -ENXIO)
return ret;
dev_err(dev, "no usb3 phy configured\n");
return -EPROBE_DEFER;
}
usb_phy_set_suspend(dwc->usb2_phy, 0);
usb_phy_set_suspend(dwc->usb3_phy, 0);
spin_lock_init(&dwc->lock);
platform_set_drvdata(pdev, dwc);
dwc->regs = regs;
dwc->regs_size = resource_size(res);
dwc->dev = dev;
dev->dma_mask = dev->parent->dma_mask;
dev->dma_parms = dev->parent->dma_parms;
dma_set_coherent_mask(dev, dev->parent->coherent_dma_mask);
pm_runtime_no_callbacks(dev);
pm_runtime_set_active(dev);
pm_runtime_enable(dev);
dwc3_cache_hwparams(dwc);
if (!dwc->ev_buffs) {
ret = dwc3_alloc_event_buffers(dwc, DWC3_EVENT_BUFFERS_SIZE);
if (ret) {
dev_err(dwc->dev, "failed to allocate event buffers\n");
ret = -ENOMEM;
goto err0;
}
}
dwc->nominal_elastic_buffer = of_property_read_bool(node,
"nominal-elastic-buffer");
ret = dwc3_core_init(dwc);
if (ret) {
dev_err(dev, "failed to initialize core\n");
goto err0;
}
ret = dwc3_event_buffers_setup(dwc);
if (ret) {
dev_err(dwc->dev, "failed to setup event buffers\n");
goto err1;
}
if (IS_ENABLED(CONFIG_USB_DWC3_HOST))
mode = DWC3_MODE_HOST;
else if (IS_ENABLED(CONFIG_USB_DWC3_GADGET))
mode = DWC3_MODE_DEVICE;
else
mode = DWC3_MODE_DRD;
/* Override mode if user selects host-only config with DRD core */
if (host_only_mode && (mode == DWC3_MODE_DRD)) {
dev_dbg(dev, "host only mode selected\n");
mode = DWC3_MODE_HOST;
}
switch (mode) {
case DWC3_MODE_DEVICE:
dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_DEVICE);
ret = dwc3_gadget_init(dwc);
if (ret) {
dev_err(dev, "failed to initialize gadget\n");
goto err2;
}
break;
case DWC3_MODE_HOST:
dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_HOST);
ret = dwc3_host_init(dwc);
if (ret) {
dev_err(dev, "failed to initialize host\n");
goto err2;
}
break;
case DWC3_MODE_DRD:
dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_OTG);
ret = dwc3_otg_init(dwc);
if (ret) {
dev_err(dev, "failed to initialize otg\n");
goto err1;
}
ret = dwc3_host_init(dwc);
if (ret) {
dev_err(dev, "failed to initialize host\n");
dwc3_otg_exit(dwc);
goto err1;
}
ret = dwc3_gadget_init(dwc);
if (ret) {
dev_err(dev, "failed to initialize gadget\n");
dwc3_host_exit(dwc);
dwc3_otg_exit(dwc);
goto err2;
}
break;
default:
dev_err(dev, "Unsupported mode of operation %d\n", mode);
goto err2;
}
dwc->mode = mode;
ret = dwc3_debugfs_init(dwc);
if (ret) {
dev_err(dev, "failed to initialize debugfs\n");
goto err3;
}
dwc3_notify_event(dwc, DWC3_CONTROLLER_POST_INITIALIZATION_EVENT);
return 0;
err3:
switch (mode) {
case DWC3_MODE_DEVICE:
dwc3_gadget_exit(dwc);
break;
case DWC3_MODE_HOST:
dwc3_host_exit(dwc);
break;
case DWC3_MODE_DRD:
dwc3_gadget_exit(dwc);
dwc3_host_exit(dwc);
dwc3_otg_exit(dwc);
break;
default:
/* do nothing */
break;
}
err2:
dwc3_event_buffers_cleanup(dwc);
err1:
dwc3_core_exit(dwc);
err0:
dwc3_free_event_buffers(dwc);
return ret;
}
static int __devinit dwc3_probe(struct platform_device *pdev)
{
struct device_node *node = pdev->dev.of_node;
struct resource *res;
struct dwc3 *dwc;
struct device *dev = &pdev->dev;
int ret = -ENOMEM;
void __iomem *regs;
void *mem;
u8 mode;
mem = devm_kzalloc(dev, sizeof(*dwc) + DWC3_ALIGN_MASK, GFP_KERNEL);
if (!mem) {
dev_err(dev, "not enough memory\n");
return -ENOMEM;
}
dwc = PTR_ALIGN(mem, DWC3_ALIGN_MASK + 1);
dwc->mem = mem;
res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (!res) {
dev_err(dev, "missing IRQ\n");
return -ENODEV;
}
dwc->xhci_resources[1] = *res;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(dev, "missing memory resource\n");
return -ENODEV;
}
dwc->xhci_resources[0] = *res;
dwc->xhci_resources[0].end = dwc->xhci_resources[0].start +
DWC3_XHCI_REGS_END;
/*
* Request memory region but exclude xHCI regs,
* since it will be requested by the xhci-plat driver.
*/
res = devm_request_mem_region(dev, res->start + DWC3_GLOBALS_REGS_START,
resource_size(res) - DWC3_GLOBALS_REGS_START,
dev_name(dev));
if (!res) {
dev_err(dev, "can't request mem region\n");
return -ENOMEM;
}
regs = devm_ioremap(dev, res->start, resource_size(res));
if (!regs) {
dev_err(dev, "ioremap failed\n");
return -ENOMEM;
}
spin_lock_init(&dwc->lock);
platform_set_drvdata(pdev, dwc);
dwc->regs = regs;
dwc->regs_size = resource_size(res);
dwc->dev = dev;
if (!strncmp("super", maximum_speed, 5))
dwc->maximum_speed = DWC3_DCFG_SUPERSPEED;
else if (!strncmp("high", maximum_speed, 4))
dwc->maximum_speed = DWC3_DCFG_HIGHSPEED;
else if (!strncmp("full", maximum_speed, 4))
dwc->maximum_speed = DWC3_DCFG_FULLSPEED1;
else if (!strncmp("low", maximum_speed, 3))
dwc->maximum_speed = DWC3_DCFG_LOWSPEED;
else
dwc->maximum_speed = DWC3_DCFG_SUPERSPEED;
if (of_get_property(node, "tx-fifo-resize", NULL))
dwc->needs_fifo_resize = true;
pm_runtime_no_callbacks(dev);
pm_runtime_set_active(dev);
pm_runtime_enable(dev);
ret = dwc3_core_init(dwc);
if (ret) {
dev_err(dev, "failed to initialize core\n");
return ret;
}
mode = DWC3_MODE(dwc->hwparams.hwparams0);
switch (mode) {
case DWC3_MODE_DEVICE:
dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_DEVICE);
ret = dwc3_gadget_init(dwc);
if (ret) {
dev_err(dev, "failed to initialize gadget\n");
goto err1;
}
break;
case DWC3_MODE_HOST:
dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_HOST);
ret = dwc3_host_init(dwc);
if (ret) {
dev_err(dev, "failed to initialize host\n");
goto err1;
}
break;
case DWC3_MODE_DRD:
dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_OTG);
ret = dwc3_otg_init(dwc);
if (ret) {
dev_err(dev, "failed to initialize otg\n");
goto err1;
}
ret = dwc3_host_init(dwc);
if (ret) {
dev_err(dev, "failed to initialize host\n");
dwc3_otg_exit(dwc);
goto err1;
}
ret = dwc3_gadget_init(dwc);
if (ret) {
dev_err(dev, "failed to initialize gadget\n");
dwc3_host_exit(dwc);
dwc3_otg_exit(dwc);
goto err1;
}
break;
default:
dev_err(dev, "Unsupported mode of operation %d\n", mode);
goto err1;
}
dwc->mode = mode;
ret = dwc3_debugfs_init(dwc);
if (ret) {
dev_err(dev, "failed to initialize debugfs\n");
goto err2;
}
return 0;
err2:
switch (mode) {
case DWC3_MODE_DEVICE:
dwc3_gadget_exit(dwc);
break;
case DWC3_MODE_HOST:
dwc3_host_exit(dwc);
break;
case DWC3_MODE_DRD:
dwc3_gadget_exit(dwc);
dwc3_host_exit(dwc);
dwc3_otg_exit(dwc);
break;
default:
/* do nothing */
break;
}
err1:
dwc3_core_exit(dwc);
return ret;
}
static int dwc3_resume_common(struct dwc3 *dwc, pm_message_t msg)
{
unsigned long flags;
int ret;
u32 reg;
/* Bring core to D0 state */
dwc3_set_usb_core_power(dwc, true);
ret = dwc3_core_init(dwc);
if (ret)
return ret;
switch (dwc->current_dr_role) {
case DWC3_GCTL_PRTCAP_DEVICE:
ret = dwc3_core_init_for_resume(dwc);
if (ret)
return ret;
dwc3_set_prtcap(dwc, DWC3_GCTL_PRTCAP_DEVICE);
spin_lock_irqsave(&dwc->lock, flags);
dwc3_gadget_resume(dwc);
spin_unlock_irqrestore(&dwc->lock, flags);
break;
case DWC3_GCTL_PRTCAP_HOST:
if (!PMSG_IS_AUTO(msg)) {
ret = dwc3_core_init_for_resume(dwc);
if (ret)
return ret;
dwc3_set_prtcap(dwc, DWC3_GCTL_PRTCAP_HOST);
break;
}
/* Restore GUSB2PHYCFG bits that were modified in suspend */
reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
if (dwc->dis_u2_susphy_quirk)
reg &= ~DWC3_GUSB2PHYCFG_SUSPHY;
if (dwc->dis_enblslpm_quirk)
reg &= ~DWC3_GUSB2PHYCFG_ENBLSLPM;
dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
phy_pm_runtime_get_sync(dwc->usb2_generic_phy);
phy_pm_runtime_get_sync(dwc->usb3_generic_phy);
break;
case DWC3_GCTL_PRTCAP_OTG:
/* nothing to do on runtime_resume */
if (PMSG_IS_AUTO(msg))
break;
ret = dwc3_core_init(dwc);
if (ret)
return ret;
dwc3_set_prtcap(dwc, dwc->current_dr_role);
dwc3_otg_init(dwc);
if (dwc->current_otg_role == DWC3_OTG_ROLE_HOST) {
dwc3_otg_host_init(dwc);
} else if (dwc->current_otg_role == DWC3_OTG_ROLE_DEVICE) {
spin_lock_irqsave(&dwc->lock, flags);
dwc3_gadget_resume(dwc);
spin_unlock_irqrestore(&dwc->lock, flags);
}
break;
default:
/* do nothing */
break;
}
return 0;
}
static int __devinit dwc3_probe(struct platform_device *pdev)
{
struct device_node *node = pdev->dev.of_node;
struct resource *res;
struct dwc3 *dwc;
struct device *dev = &pdev->dev;
int ret = -ENOMEM;
void __iomem *regs;
void *mem;
u8 mode;
bool host_only_mode;
mem = devm_kzalloc(dev, sizeof(*dwc) + DWC3_ALIGN_MASK, GFP_KERNEL);
if (!mem) {
dev_err(dev, "not enough memory\n");
return -ENOMEM;
}
dwc = PTR_ALIGN(mem, DWC3_ALIGN_MASK + 1);
dwc->mem = mem;
if (!dev->dma_mask)
dev->dma_mask = &dwc3_dma_mask;
if (!dev->coherent_dma_mask)
dev->coherent_dma_mask = DMA_BIT_MASK(64);
dwc->notify_event = notify_event;
res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (!res) {
dev_err(dev, "missing IRQ\n");
return -ENODEV;
}
dwc->xhci_resources[1].start = res->start;
dwc->xhci_resources[1].end = res->end;
dwc->xhci_resources[1].flags = res->flags;
dwc->xhci_resources[1].name = res->name;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(dev, "missing memory resource\n");
return -ENODEV;
}
dwc->xhci_resources[0].start = res->start;
dwc->xhci_resources[0].end = dwc->xhci_resources[0].start +
DWC3_XHCI_REGS_END;
dwc->xhci_resources[0].flags = res->flags;
dwc->xhci_resources[0].name = res->name;
/*
* Request memory region but exclude xHCI regs,
* since it will be requested by the xhci-plat driver.
*/
res = devm_request_mem_region(dev, res->start + DWC3_GLOBALS_REGS_START,
resource_size(res) - DWC3_GLOBALS_REGS_START,
dev_name(dev));
if (!res) {
dev_err(dev, "can't request mem region\n");
return -ENOMEM;
}
regs = devm_ioremap_nocache(dev, res->start, resource_size(res));
if (!regs) {
dev_err(dev, "ioremap failed\n");
return -ENOMEM;
}
spin_lock_init(&dwc->lock);
platform_set_drvdata(pdev, dwc);
dwc->regs = regs;
dwc->regs_size = resource_size(res);
dwc->dev = dev;
if (!strncmp("super", maximum_speed, 5))
dwc->maximum_speed = DWC3_DCFG_SUPERSPEED;
else if (!strncmp("high", maximum_speed, 4))
dwc->maximum_speed = DWC3_DCFG_HIGHSPEED;
else if (!strncmp("full", maximum_speed, 4))
dwc->maximum_speed = DWC3_DCFG_FULLSPEED1;
else if (!strncmp("low", maximum_speed, 3))
dwc->maximum_speed = DWC3_DCFG_LOWSPEED;
else
dwc->maximum_speed = DWC3_DCFG_SUPERSPEED;
dwc->needs_fifo_resize = of_property_read_bool(node, "tx-fifo-resize");
host_only_mode = of_property_read_bool(node, "host-only-mode");
dwc->no_set_vbus_power = of_property_read_bool(node,
"no-set-vbus-power");
pm_runtime_no_callbacks(dev);
pm_runtime_set_active(dev);
pm_runtime_enable(dev);
ret = dwc3_core_init(dwc);
if (ret) {
dev_err(dev, "failed to initialize core\n");
return ret;
}
mode = DWC3_MODE(dwc->hwparams.hwparams0);
/* Override mode if user selects host-only config with DRD core */
if (host_only_mode && (mode == DWC3_MODE_DRD)) {
dev_dbg(dev, "host only mode selected\n");
mode = DWC3_MODE_HOST;
}
switch (mode) {
case DWC3_MODE_DEVICE:
dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_DEVICE);
ret = dwc3_gadget_init(dwc);
if (ret) {
dev_err(dev, "failed to initialize gadget\n");
goto err1;
}
break;
case DWC3_MODE_HOST:
dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_HOST);
ret = dwc3_host_init(dwc);
if (ret) {
dev_err(dev, "failed to initialize host\n");
goto err1;
}
break;
case DWC3_MODE_DRD:
dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_OTG);
ret = dwc3_otg_init(dwc);
if (ret) {
dev_err(dev, "failed to initialize otg\n");
goto err1;
}
ret = dwc3_host_init(dwc);
if (ret) {
dev_err(dev, "failed to initialize host\n");
dwc3_otg_exit(dwc);
goto err1;
}
ret = dwc3_gadget_init(dwc);
if (ret) {
dev_err(dev, "failed to initialize gadget\n");
dwc3_host_exit(dwc);
dwc3_otg_exit(dwc);
goto err1;
}
break;
default:
dev_err(dev, "Unsupported mode of operation %d\n", mode);
goto err1;
}
dwc->mode = mode;
ret = dwc3_debugfs_init(dwc);
if (ret) {
dev_err(dev, "failed to initialize debugfs\n");
goto err2;
}
dwc3_notify_event(dwc, DWC3_CONTROLLER_POST_INITIALIZATION_EVENT);
return 0;
err2:
switch (mode) {
case DWC3_MODE_DEVICE:
dwc3_gadget_exit(dwc);
break;
case DWC3_MODE_HOST:
dwc3_host_exit(dwc);
break;
case DWC3_MODE_DRD:
dwc3_gadget_exit(dwc);
dwc3_host_exit(dwc);
dwc3_otg_exit(dwc);
break;
default:
/* do nothing */
break;
}
err1:
dwc3_core_exit(dwc);
return ret;
}
static void __dwc3_set_mode(struct work_struct *work)
{
struct dwc3 *dwc = work_to_dwc(work);
unsigned long flags;
int ret;
if (dwc->dr_mode != USB_DR_MODE_OTG)
return;
if (dwc->current_dr_role == DWC3_GCTL_PRTCAP_OTG)
dwc3_otg_update(dwc, 0);
if (!dwc->desired_dr_role)
return;
if (dwc->desired_dr_role == dwc->current_dr_role)
return;
if (dwc->desired_dr_role == DWC3_GCTL_PRTCAP_OTG && dwc->edev)
return;
switch (dwc->current_dr_role) {
case DWC3_GCTL_PRTCAP_HOST:
dwc3_host_exit(dwc);
break;
case DWC3_GCTL_PRTCAP_DEVICE:
dwc3_gadget_exit(dwc);
dwc3_event_buffers_cleanup(dwc);
break;
case DWC3_GCTL_PRTCAP_OTG:
dwc3_otg_exit(dwc);
spin_lock_irqsave(&dwc->lock, flags);
dwc->desired_otg_role = DWC3_OTG_ROLE_IDLE;
spin_unlock_irqrestore(&dwc->lock, flags);
dwc3_otg_update(dwc, 1);
break;
default:
break;
}
spin_lock_irqsave(&dwc->lock, flags);
dwc3_set_prtcap(dwc, dwc->desired_dr_role);
spin_unlock_irqrestore(&dwc->lock, flags);
switch (dwc->desired_dr_role) {
case DWC3_GCTL_PRTCAP_HOST:
ret = dwc3_host_init(dwc);
if (ret) {
dev_err(dwc->dev, "failed to initialize host\n");
} else {
if (dwc->usb2_phy)
otg_set_vbus(dwc->usb2_phy->otg, true);
phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_HOST);
phy_set_mode(dwc->usb3_generic_phy, PHY_MODE_USB_HOST);
phy_calibrate(dwc->usb2_generic_phy);
}
break;
case DWC3_GCTL_PRTCAP_DEVICE:
dwc3_event_buffers_setup(dwc);
if (dwc->usb2_phy)
otg_set_vbus(dwc->usb2_phy->otg, false);
phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_DEVICE);
phy_set_mode(dwc->usb3_generic_phy, PHY_MODE_USB_DEVICE);
ret = dwc3_gadget_init(dwc);
if (ret)
dev_err(dwc->dev, "failed to initialize peripheral\n");
break;
case DWC3_GCTL_PRTCAP_OTG:
dwc3_otg_init(dwc);
dwc3_otg_update(dwc, 0);
break;
default:
break;
}
}