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path: root/drivers/usb/dwc3/core.c
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Diffstat (limited to 'drivers/usb/dwc3/core.c')
-rw-r--r--drivers/usb/dwc3/core.c245
1 files changed, 176 insertions, 69 deletions
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 66a08b527165..ec8407972b9d 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -25,7 +25,9 @@
#include <linux/of.h>
#include <linux/of_graph.h>
#include <linux/acpi.h>
+#include <linux/pci.h>
#include <linux/pinctrl/consumer.h>
+#include <linux/pinctrl/devinfo.h>
#include <linux/reset.h>
#include <linux/bitfield.h>
@@ -36,6 +38,7 @@
#include "core.h"
#include "gadget.h"
+#include "glue.h"
#include "io.h"
#include "debug.h"
@@ -130,6 +133,7 @@ void dwc3_enable_susphy(struct dwc3 *dwc, bool enable)
dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(i), reg);
}
}
+EXPORT_SYMBOL_GPL(dwc3_enable_susphy);
void dwc3_set_prtcap(struct dwc3 *dwc, u32 mode, bool ignore_susphy)
{
@@ -154,7 +158,9 @@ void dwc3_set_prtcap(struct dwc3 *dwc, u32 mode, bool ignore_susphy)
dwc3_writel(dwc->regs, DWC3_GCTL, reg);
dwc->current_dr_role = mode;
+ trace_dwc3_set_prtcap(mode);
}
+EXPORT_SYMBOL_GPL(dwc3_set_prtcap);
static void __dwc3_set_mode(struct work_struct *work)
{
@@ -277,7 +283,6 @@ static void __dwc3_set_mode(struct work_struct *work)
}
out:
- pm_runtime_mark_last_busy(dwc->dev);
pm_runtime_put_autosuspend(dwc->dev);
mutex_unlock(&dwc->mutex);
}
@@ -972,7 +977,7 @@ static void dwc3_clk_disable(struct dwc3 *dwc)
clk_disable_unprepare(dwc->bus_clk);
}
-static void dwc3_core_exit(struct dwc3 *dwc)
+void dwc3_core_exit(struct dwc3 *dwc)
{
dwc3_event_buffers_cleanup(dwc);
dwc3_phy_power_off(dwc);
@@ -980,6 +985,7 @@ static void dwc3_core_exit(struct dwc3 *dwc)
dwc3_clk_disable(dwc);
reset_control_assert(dwc->reset);
}
+EXPORT_SYMBOL_GPL(dwc3_core_exit);
static bool dwc3_core_is_valid(struct dwc3 *dwc)
{
@@ -1325,7 +1331,7 @@ static void dwc3_config_threshold(struct dwc3 *dwc)
*
* Returns 0 on success otherwise negative errno.
*/
-static int dwc3_core_init(struct dwc3 *dwc)
+int dwc3_core_init(struct dwc3 *dwc)
{
unsigned int hw_mode;
u32 reg;
@@ -1478,10 +1484,6 @@ static int dwc3_core_init(struct dwc3 *dwc)
dwc3_config_threshold(dwc);
- /*
- * Modify this for all supported Super Speed ports when
- * multiport support is added.
- */
if (hw_mode != DWC3_GHWPARAMS0_MODE_GADGET &&
(DWC3_IP_IS(DWC31)) &&
dwc->maximum_speed == USB_SPEED_SUPER) {
@@ -1525,6 +1527,7 @@ err_exit_ulpi:
return ret;
}
+EXPORT_SYMBOL_GPL(dwc3_core_init);
static int dwc3_core_get_phy(struct dwc3 *dwc)
{
@@ -1663,7 +1666,8 @@ static void dwc3_core_exit_mode(struct dwc3 *dwc)
dwc3_set_prtcap(dwc, DWC3_GCTL_PRTCAP_DEVICE, true);
}
-static void dwc3_get_software_properties(struct dwc3 *dwc)
+static void dwc3_get_software_properties(struct dwc3 *dwc,
+ const struct dwc3_properties *properties)
{
struct device *tmpdev;
u16 gsbuscfg0_reqinfo;
@@ -1671,6 +1675,12 @@ static void dwc3_get_software_properties(struct dwc3 *dwc)
dwc->gsbuscfg0_reqinfo = DWC3_GSBUSCFG0_REQINFO_UNSPECIFIED;
+ if (properties->gsbuscfg0_reqinfo !=
+ DWC3_GSBUSCFG0_REQINFO_UNSPECIFIED) {
+ dwc->gsbuscfg0_reqinfo = properties->gsbuscfg0_reqinfo;
+ return;
+ }
+
/*
* Iterate over all parent nodes for finding swnode properties
* and non-DT (non-ABI) properties.
@@ -1699,6 +1709,7 @@ static void dwc3_get_properties(struct dwc3 *dwc)
u8 tx_thr_num_pkt_prd = 0;
u8 tx_max_burst_prd = 0;
u8 tx_fifo_resize_max_num;
+ u16 num_hc_interrupters;
/* default to highest possible threshold */
lpm_nyet_threshold = 0xf;
@@ -1719,6 +1730,9 @@ static void dwc3_get_properties(struct dwc3 *dwc)
*/
tx_fifo_resize_max_num = 6;
+ /* default to a single XHCI interrupter */
+ num_hc_interrupters = 1;
+
dwc->maximum_speed = usb_get_maximum_speed(dev);
dwc->max_ssp_rate = usb_get_maximum_ssp_rate(dev);
dwc->dr_mode = usb_get_dr_mode(dev);
@@ -1765,6 +1779,12 @@ static void dwc3_get_properties(struct dwc3 *dwc)
&tx_thr_num_pkt_prd);
device_property_read_u8(dev, "snps,tx-max-burst-prd",
&tx_max_burst_prd);
+ device_property_read_u16(dev, "num-hc-interrupters",
+ &num_hc_interrupters);
+ /* DWC3 core allowed to have a max of 8 interrupters */
+ if (num_hc_interrupters > 8)
+ num_hc_interrupters = 8;
+
dwc->do_fifo_resize = device_property_read_bool(dev,
"tx-fifo-resize");
if (dwc->do_fifo_resize)
@@ -1851,6 +1871,8 @@ static void dwc3_get_properties(struct dwc3 *dwc)
dwc->tx_max_burst_prd = tx_max_burst_prd;
dwc->tx_fifo_resize_max_num = tx_fifo_resize_max_num;
+
+ dwc->num_hc_interrupters = num_hc_interrupters;
}
/* check whether the core supports IMOD */
@@ -2148,27 +2170,16 @@ static struct power_supply *dwc3_get_usb_power_supply(struct dwc3 *dwc)
return usb_psy;
}
-static int dwc3_probe(struct platform_device *pdev)
+int dwc3_core_probe(const struct dwc3_probe_data *data)
{
- struct device *dev = &pdev->dev;
- struct resource *res, dwc_res;
+ struct dwc3 *dwc = data->dwc;
+ struct device *dev = dwc->dev;
+ struct resource dwc_res;
unsigned int hw_mode;
void __iomem *regs;
- struct dwc3 *dwc;
+ struct resource *res = data->res;
int ret;
- dwc = devm_kzalloc(dev, sizeof(*dwc), GFP_KERNEL);
- if (!dwc)
- return -ENOMEM;
-
- dwc->dev = dev;
-
- 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;
@@ -2202,21 +2213,23 @@ static int dwc3_probe(struct platform_device *pdev)
dwc3_get_properties(dwc);
- dwc3_get_software_properties(dwc);
+ dwc3_get_software_properties(dwc, &data->properties);
dwc->usb_psy = dwc3_get_usb_power_supply(dwc);
if (IS_ERR(dwc->usb_psy))
return dev_err_probe(dev, PTR_ERR(dwc->usb_psy), "couldn't get usb power supply\n");
- dwc->reset = devm_reset_control_array_get_optional_shared(dev);
- if (IS_ERR(dwc->reset)) {
- ret = PTR_ERR(dwc->reset);
- goto err_put_psy;
- }
+ if (!data->ignore_clocks_and_resets) {
+ dwc->reset = devm_reset_control_array_get_optional_shared(dev);
+ if (IS_ERR(dwc->reset)) {
+ ret = PTR_ERR(dwc->reset);
+ goto err_put_psy;
+ }
- ret = dwc3_get_clocks(dwc);
- if (ret)
- goto err_put_psy;
+ ret = dwc3_get_clocks(dwc);
+ if (ret)
+ goto err_put_psy;
+ }
ret = reset_control_deassert(dwc->reset);
if (ret)
@@ -2232,10 +2245,10 @@ static int dwc3_probe(struct platform_device *pdev)
goto err_disable_clks;
}
- platform_set_drvdata(pdev, dwc);
+ dev_set_drvdata(dev, dwc);
dwc3_cache_hwparams(dwc);
- if (!dwc->sysdev_is_parent &&
+ if (!dev_is_pci(dwc->sysdev) &&
DWC3_GHWPARAMS0_AWIDTH(dwc->hwparams.hwparams0) == 64) {
ret = dma_set_mask_and_coherent(dwc->sysdev, DMA_BIT_MASK(64));
if (ret)
@@ -2293,9 +2306,11 @@ static int dwc3_probe(struct platform_device *pdev)
dwc3_check_params(dwc);
dwc3_debugfs_init(dwc);
- ret = dwc3_core_init_mode(dwc);
- if (ret)
- goto err_exit_debugfs;
+ if (!data->skip_core_init_mode) {
+ ret = dwc3_core_init_mode(dwc);
+ if (ret)
+ goto err_exit_debugfs;
+ }
pm_runtime_put(dev);
@@ -2327,12 +2342,37 @@ err_put_psy:
return ret;
}
+EXPORT_SYMBOL_GPL(dwc3_core_probe);
-static void dwc3_remove(struct platform_device *pdev)
+static int dwc3_probe(struct platform_device *pdev)
{
- struct dwc3 *dwc = platform_get_drvdata(pdev);
+ struct dwc3_probe_data probe_data = {};
+ struct resource *res;
+ struct dwc3 *dwc;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(&pdev->dev, "missing memory resource\n");
+ return -ENODEV;
+ }
+
+ dwc = devm_kzalloc(&pdev->dev, sizeof(*dwc), GFP_KERNEL);
+ if (!dwc)
+ return -ENOMEM;
+
+ dwc->dev = &pdev->dev;
+ dwc->glue_ops = NULL;
- pm_runtime_get_sync(&pdev->dev);
+ probe_data.dwc = dwc;
+ probe_data.res = res;
+ probe_data.properties = DWC3_DEFAULT_PROPERTIES;
+
+ return dwc3_core_probe(&probe_data);
+}
+
+void dwc3_core_remove(struct dwc3 *dwc)
+{
+ pm_runtime_get_sync(dwc->dev);
dwc3_core_exit_mode(dwc);
dwc3_debugfs_exit(dwc);
@@ -2340,22 +2380,28 @@ static void dwc3_remove(struct platform_device *pdev)
dwc3_core_exit(dwc);
dwc3_ulpi_exit(dwc);
- pm_runtime_allow(&pdev->dev);
- pm_runtime_disable(&pdev->dev);
- pm_runtime_dont_use_autosuspend(&pdev->dev);
- pm_runtime_put_noidle(&pdev->dev);
+ pm_runtime_allow(dwc->dev);
+ pm_runtime_disable(dwc->dev);
+ pm_runtime_dont_use_autosuspend(dwc->dev);
+ pm_runtime_put_noidle(dwc->dev);
/*
* HACK: Clear the driver data, which is currently accessed by parent
* glue drivers, before allowing the parent to suspend.
*/
- platform_set_drvdata(pdev, NULL);
- pm_runtime_set_suspended(&pdev->dev);
+ dev_set_drvdata(dwc->dev, NULL);
+ pm_runtime_set_suspended(dwc->dev);
dwc3_free_event_buffers(dwc);
if (dwc->usb_psy)
power_supply_put(dwc->usb_psy);
}
+EXPORT_SYMBOL_GPL(dwc3_core_remove);
+
+static void dwc3_remove(struct platform_device *pdev)
+{
+ dwc3_core_remove(platform_get_drvdata(pdev));
+}
#ifdef CONFIG_PM
static int dwc3_core_init_for_resume(struct dwc3 *dwc)
@@ -2388,6 +2434,7 @@ static int dwc3_suspend_common(struct dwc3 *dwc, pm_message_t msg)
{
u32 reg;
int i;
+ int ret;
if (!pm_runtime_suspended(dwc->dev) && !PMSG_IS_AUTO(msg)) {
dwc->susphy_state = (dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0)) &
@@ -2406,7 +2453,9 @@ static int dwc3_suspend_common(struct dwc3 *dwc, pm_message_t msg)
case DWC3_GCTL_PRTCAP_DEVICE:
if (pm_runtime_suspended(dwc->dev))
break;
- dwc3_gadget_suspend(dwc);
+ ret = dwc3_gadget_suspend(dwc);
+ if (ret)
+ return ret;
synchronize_irq(dwc->irq_gadget);
dwc3_core_exit(dwc);
break;
@@ -2441,7 +2490,9 @@ static int dwc3_suspend_common(struct dwc3 *dwc, pm_message_t msg)
break;
if (dwc->current_otg_role == DWC3_OTG_ROLE_DEVICE) {
- dwc3_gadget_suspend(dwc);
+ ret = dwc3_gadget_suspend(dwc);
+ if (ret)
+ return ret;
synchronize_irq(dwc->irq_gadget);
}
@@ -2544,9 +2595,8 @@ static int dwc3_runtime_checks(struct dwc3 *dwc)
return 0;
}
-static int dwc3_runtime_suspend(struct device *dev)
+int dwc3_runtime_suspend(struct dwc3 *dwc)
{
- struct dwc3 *dwc = dev_get_drvdata(dev);
int ret;
if (dwc3_runtime_checks(dwc))
@@ -2558,10 +2608,11 @@ static int dwc3_runtime_suspend(struct device *dev)
return 0;
}
+EXPORT_SYMBOL_GPL(dwc3_runtime_suspend);
-static int dwc3_runtime_resume(struct device *dev)
+int dwc3_runtime_resume(struct dwc3 *dwc)
{
- struct dwc3 *dwc = dev_get_drvdata(dev);
+ struct device *dev = dwc->dev;
int ret;
ret = dwc3_resume_common(dwc, PMSG_AUTO_RESUME);
@@ -2571,7 +2622,7 @@ static int dwc3_runtime_resume(struct device *dev)
switch (dwc->current_dr_role) {
case DWC3_GCTL_PRTCAP_DEVICE:
if (dwc->pending_events) {
- pm_runtime_put(dwc->dev);
+ pm_runtime_put(dev);
dwc->pending_events = false;
enable_irq(dwc->irq_gadget);
}
@@ -2586,10 +2637,11 @@ static int dwc3_runtime_resume(struct device *dev)
return 0;
}
+EXPORT_SYMBOL_GPL(dwc3_runtime_resume);
-static int dwc3_runtime_idle(struct device *dev)
+int dwc3_runtime_idle(struct dwc3 *dwc)
{
- struct dwc3 *dwc = dev_get_drvdata(dev);
+ struct device *dev = dwc->dev;
switch (dwc->current_dr_role) {
case DWC3_GCTL_PRTCAP_DEVICE:
@@ -2602,17 +2654,32 @@ static int dwc3_runtime_idle(struct device *dev)
break;
}
- pm_runtime_mark_last_busy(dev);
pm_runtime_autosuspend(dev);
return 0;
}
+EXPORT_SYMBOL_GPL(dwc3_runtime_idle);
+
+static int dwc3_plat_runtime_suspend(struct device *dev)
+{
+ return dwc3_runtime_suspend(dev_get_drvdata(dev));
+}
+
+static int dwc3_plat_runtime_resume(struct device *dev)
+{
+ return dwc3_runtime_resume(dev_get_drvdata(dev));
+}
+
+static int dwc3_plat_runtime_idle(struct device *dev)
+{
+ return dwc3_runtime_idle(dev_get_drvdata(dev));
+}
#endif /* CONFIG_PM */
#ifdef CONFIG_PM_SLEEP
-static int dwc3_suspend(struct device *dev)
+int dwc3_pm_suspend(struct dwc3 *dwc)
{
- struct dwc3 *dwc = dev_get_drvdata(dev);
+ struct device *dev = dwc->dev;
int ret;
ret = dwc3_suspend_common(dwc, PMSG_SUSPEND);
@@ -2623,10 +2690,11 @@ static int dwc3_suspend(struct device *dev)
return 0;
}
+EXPORT_SYMBOL_GPL(dwc3_pm_suspend);
-static int dwc3_resume(struct device *dev)
+int dwc3_pm_resume(struct dwc3 *dwc)
{
- struct dwc3 *dwc = dev_get_drvdata(dev);
+ struct device *dev = dwc->dev;
int ret = 0;
pinctrl_pm_select_default_state(dev);
@@ -2645,10 +2713,10 @@ out:
return ret;
}
+EXPORT_SYMBOL_GPL(dwc3_pm_resume);
-static void dwc3_complete(struct device *dev)
+void dwc3_pm_complete(struct dwc3 *dwc)
{
- struct dwc3 *dwc = dev_get_drvdata(dev);
u32 reg;
if (dwc->current_dr_role == DWC3_GCTL_PRTCAP_HOST &&
@@ -2658,21 +2726,60 @@ static void dwc3_complete(struct device *dev)
dwc3_writel(dwc->regs, DWC3_GUCTL3, reg);
}
}
+EXPORT_SYMBOL_GPL(dwc3_pm_complete);
+
+int dwc3_pm_prepare(struct dwc3 *dwc)
+{
+ struct device *dev = dwc->dev;
+
+ /*
+ * Indicate to the PM core that it may safely leave the device in
+ * runtime suspend if runtime-suspended already in device mode.
+ */
+ if (dwc->current_dr_role == DWC3_GCTL_PRTCAP_DEVICE &&
+ pm_runtime_suspended(dev) &&
+ !dev_pinctrl(dev))
+ return 1;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(dwc3_pm_prepare);
+
+static int dwc3_plat_suspend(struct device *dev)
+{
+ return dwc3_pm_suspend(dev_get_drvdata(dev));
+}
+
+static int dwc3_plat_resume(struct device *dev)
+{
+ return dwc3_pm_resume(dev_get_drvdata(dev));
+}
+
+static void dwc3_plat_complete(struct device *dev)
+{
+ dwc3_pm_complete(dev_get_drvdata(dev));
+}
+
+static int dwc3_plat_prepare(struct device *dev)
+{
+ return dwc3_pm_prepare(dev_get_drvdata(dev));
+}
#else
-#define dwc3_complete NULL
+#define dwc3_plat_complete NULL
+#define dwc3_plat_prepare NULL
#endif /* CONFIG_PM_SLEEP */
static const struct dev_pm_ops dwc3_dev_pm_ops = {
- SET_SYSTEM_SLEEP_PM_OPS(dwc3_suspend, dwc3_resume)
- .complete = dwc3_complete,
-
+ SET_SYSTEM_SLEEP_PM_OPS(dwc3_plat_suspend, dwc3_plat_resume)
+ .complete = dwc3_plat_complete,
+ .prepare = dwc3_plat_prepare,
/*
* Runtime suspend halts the controller on disconnection. It relies on
* platforms with custom connection notification to start the controller
* again.
*/
- SET_RUNTIME_PM_OPS(dwc3_runtime_suspend, dwc3_runtime_resume,
- dwc3_runtime_idle)
+ SET_RUNTIME_PM_OPS(dwc3_plat_runtime_suspend, dwc3_plat_runtime_resume,
+ dwc3_plat_runtime_idle)
};
#ifdef CONFIG_OF
generated by cgit (git 2.34.1) at 2026-01-05 02:24:04 +0000