[RFC PATCH v2 04/64] usb: dwc3: import from kernel v4.1
Jens Wiklander
jens.wiklander at linaro.org
Thu May 7 11:27:11 CEST 2026
Sync Linux kernel dwc3 changes from v4.0 to v4.1.
The following files are preserved accross the import:
Makefile Kconfig dwc3-meson-g12a.c dwc3-meson-gxl.c dwc3-omap.c
dwc3-uniphier.c dwc3-generic.h dwc3-generic.c dwc3-generic-sti.c
dwc3-layerscape.c ti_usb_phy.c
Skipping unused files:
debugfs.c drd.c dwc3-exynos.c dwc3-haps.c dwc3-imx8mp.c dwc3-keystone.c
dwc3-octeon.c dwc3-of-simple.c dwc3-pci.c dwc3-qcom.c dwc3-qcom-legacy.c
dwc3-rtk.c dwc3-st.c dwc3-xilinx.c host.c trace.c trace.h ulpi.c
Note that this is a raw import and doesn't build.
A fixup commit at the end of the series fixes that.
List of commits: git log --oneline v4.0..v4.1
Commits imported:
459e210c4fd0 usb: dwc3: gadget: Fix incorrect DEPCMD and DGCMD status macros
228321904089 usb: dwc3: dwc3-omap: correct the register macros
eac68e8f979b usb: dwc3: make LPM configurable in DT
adf9c3c85615 usb: move definition of PCI_VENDOR_ID_SYNOPSYS to linux/pci_ids.h
8f2c9544aba6 usb: dwc3: gadget: drop unnecessary loop when cleaning up TRBs
3d0184d08757 usb: dwc3: omap: call of_platform_depopulate() instead
3da1f6ee3563 usb: dwc3: core: only reset res->start in case of error
Signed-off-by: Jens Wiklander <jens.wiklander at linaro.org>
---
drivers/usb/dwc3/core.c | 59 ++++++++++++++++++++------------
drivers/usb/dwc3/core.h | 6 ++--
drivers/usb/dwc3/gadget.c | 37 +++++++++-----------
drivers/usb/dwc3/platform_data.h | 1 +
4 files changed, 58 insertions(+), 45 deletions(-)
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 9f0e209b8f6c..2bbab3d86fff 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -774,17 +774,13 @@ static int dwc3_probe(struct platform_device *pdev)
* since it will be requested by the xhci-plat driver.
*/
regs = devm_ioremap_resource(dev, res);
- if (IS_ERR(regs))
- return PTR_ERR(regs);
+ if (IS_ERR(regs)) {
+ ret = PTR_ERR(regs);
+ goto err0;
+ }
dwc->regs = regs;
dwc->regs_size = resource_size(res);
- /*
- * restore res->start back to its original value so that,
- * in case the probe is deferred, we don't end up getting error in
- * request the memory region the next time probe is called.
- */
- res->start -= DWC3_GLOBALS_REGS_START;
/* default to highest possible threshold */
lpm_nyet_threshold = 0xff;
@@ -808,6 +804,8 @@ static int dwc3_probe(struct platform_device *pdev)
"snps,is-utmi-l1-suspend");
of_property_read_u8(node, "snps,hird-threshold",
&hird_threshold);
+ dwc->usb3_lpm_capable = of_property_read_bool(node,
+ "snps,usb3_lpm_capable");
dwc->needs_fifo_resize = of_property_read_bool(node,
"tx-fifo-resize");
@@ -848,6 +846,7 @@ static int dwc3_probe(struct platform_device *pdev)
hird_threshold = pdata->hird_threshold;
dwc->needs_fifo_resize = pdata->tx_fifo_resize;
+ dwc->usb3_lpm_capable = pdata->usb3_lpm_capable;
dwc->dr_mode = pdata->dr_mode;
dwc->disable_scramble_quirk = pdata->disable_scramble_quirk;
@@ -878,7 +877,7 @@ static int dwc3_probe(struct platform_device *pdev)
ret = dwc3_core_get_phy(dwc);
if (ret)
- return ret;
+ goto err0;
spin_lock_init(&dwc->lock);
platform_set_drvdata(pdev, dwc);
@@ -899,7 +898,7 @@ static int dwc3_probe(struct platform_device *pdev)
if (ret) {
dev_err(dwc->dev, "failed to allocate event buffers\n");
ret = -ENOMEM;
- goto err0;
+ goto err1;
}
if (IS_ENABLED(CONFIG_USB_DWC3_HOST))
@@ -913,65 +912,81 @@ static int dwc3_probe(struct platform_device *pdev)
ret = dwc3_core_init(dwc);
if (ret) {
dev_err(dev, "failed to initialize core\n");
- goto err0;
+ goto err1;
}
usb_phy_set_suspend(dwc->usb2_phy, 0);
usb_phy_set_suspend(dwc->usb3_phy, 0);
ret = phy_power_on(dwc->usb2_generic_phy);
if (ret < 0)
- goto err1;
+ goto err2;
ret = phy_power_on(dwc->usb3_generic_phy);
if (ret < 0)
- goto err_usb2phy_power;
+ goto err3;
ret = dwc3_event_buffers_setup(dwc);
if (ret) {
dev_err(dwc->dev, "failed to setup event buffers\n");
- goto err_usb3phy_power;
+ goto err4;
}
ret = dwc3_core_init_mode(dwc);
if (ret)
- goto err2;
+ goto err5;
ret = dwc3_debugfs_init(dwc);
if (ret) {
dev_err(dev, "failed to initialize debugfs\n");
- goto err3;
+ goto err6;
}
pm_runtime_allow(dev);
return 0;
-err3:
+err6:
dwc3_core_exit_mode(dwc);
-err2:
+err5:
dwc3_event_buffers_cleanup(dwc);
-err_usb3phy_power:
+err4:
phy_power_off(dwc->usb3_generic_phy);
-err_usb2phy_power:
+err3:
phy_power_off(dwc->usb2_generic_phy);
-err1:
+err2:
usb_phy_set_suspend(dwc->usb2_phy, 1);
usb_phy_set_suspend(dwc->usb3_phy, 1);
dwc3_core_exit(dwc);
-err0:
+err1:
dwc3_free_event_buffers(dwc);
+err0:
+ /*
+ * restore res->start back to its original value so that, in case the
+ * probe is deferred, we don't end up getting error in request the
+ * memory region the next time probe is called.
+ */
+ res->start -= DWC3_GLOBALS_REGS_START;
+
return ret;
}
static int dwc3_remove(struct platform_device *pdev)
{
struct dwc3 *dwc = platform_get_drvdata(pdev);
+ struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+
+ /*
+ * restore res->start back to its original value so that, in case the
+ * probe is deferred, we don't end up getting error in request the
+ * memory region the next time probe is called.
+ */
+ res->start -= DWC3_GLOBALS_REGS_START;
dwc3_debugfs_exit(dwc);
dwc3_core_exit_mode(dwc);
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index d201910b892f..c0eafa6fd403 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -339,7 +339,7 @@
#define DWC3_DGCMD_SET_ENDPOINT_NRDY 0x0c
#define DWC3_DGCMD_RUN_SOC_BUS_LOOPBACK 0x10
-#define DWC3_DGCMD_STATUS(n) (((n) >> 15) & 1)
+#define DWC3_DGCMD_STATUS(n) (((n) >> 12) & 0x0F)
#define DWC3_DGCMD_CMDACT (1 << 10)
#define DWC3_DGCMD_CMDIOC (1 << 8)
@@ -355,7 +355,7 @@
#define DWC3_DEPCMD_PARAM_SHIFT 16
#define DWC3_DEPCMD_PARAM(x) ((x) << DWC3_DEPCMD_PARAM_SHIFT)
#define DWC3_DEPCMD_GET_RSC_IDX(x) (((x) >> DWC3_DEPCMD_PARAM_SHIFT) & 0x7f)
-#define DWC3_DEPCMD_STATUS(x) (((x) >> 15) & 1)
+#define DWC3_DEPCMD_STATUS(x) (((x) >> 12) & 0x0F)
#define DWC3_DEPCMD_HIPRI_FORCERM (1 << 11)
#define DWC3_DEPCMD_CMDACT (1 << 10)
#define DWC3_DEPCMD_CMDIOC (1 << 8)
@@ -689,6 +689,7 @@ struct dwc3_scratchpad_array {
* @setup_packet_pending: true when there's a Setup Packet in FIFO. Workaround
* @start_config_issued: true when StartConfig command has been issued
* @three_stage_setup: set if we perform a three phase setup
+ * @usb3_lpm_capable: set if hadrware supports Link Power Management
* @disable_scramble_quirk: set if we enable the disable scramble quirk
* @u2exit_lfps_quirk: set if we enable u2exit lfps quirk
* @u2ss_inp3_quirk: set if we enable P3 OK for U2/SS Inactive quirk
@@ -812,6 +813,7 @@ struct dwc3 {
unsigned setup_packet_pending:1;
unsigned start_config_issued:1;
unsigned three_stage_setup:1;
+ unsigned usb3_lpm_capable:1;
unsigned disable_scramble_quirk:1;
unsigned u2exit_lfps_quirk:1;
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index a03a485205c7..8946c32047e9 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -1855,32 +1855,27 @@ static int dwc3_cleanup_done_reqs(struct dwc3 *dwc, struct dwc3_ep *dep,
unsigned int i;
int ret;
+ req = next_request(&dep->req_queued);
+ if (!req) {
+ WARN_ON_ONCE(1);
+ return 1;
+ }
+ i = 0;
do {
- req = next_request(&dep->req_queued);
- if (!req) {
- WARN_ON_ONCE(1);
- return 1;
- }
- i = 0;
- do {
- slot = req->start_slot + i;
- if ((slot == DWC3_TRB_NUM - 1) &&
+ slot = req->start_slot + i;
+ if ((slot == DWC3_TRB_NUM - 1) &&
usb_endpoint_xfer_isoc(dep->endpoint.desc))
- slot++;
- slot %= DWC3_TRB_NUM;
- trb = &dep->trb_pool[slot];
-
- ret = __dwc3_cleanup_done_trbs(dwc, dep, req, trb,
- event, status);
- if (ret)
- break;
- }while (++i < req->request.num_mapped_sgs);
-
- dwc3_gadget_giveback(dep, req, status);
+ slot++;
+ slot %= DWC3_TRB_NUM;
+ trb = &dep->trb_pool[slot];
+ ret = __dwc3_cleanup_done_trbs(dwc, dep, req, trb,
+ event, status);
if (ret)
break;
- } while (1);
+ } while (++i < req->request.num_mapped_sgs);
+
+ dwc3_gadget_giveback(dep, req, status);
if (usb_endpoint_xfer_isoc(dep->endpoint.desc) &&
list_empty(&dep->req_queued)) {
diff --git a/drivers/usb/dwc3/platform_data.h b/drivers/usb/dwc3/platform_data.h
index a3a3b6d5668c..a2bd464be828 100644
--- a/drivers/usb/dwc3/platform_data.h
+++ b/drivers/usb/dwc3/platform_data.h
@@ -24,6 +24,7 @@ struct dwc3_platform_data {
enum usb_device_speed maximum_speed;
enum usb_dr_mode dr_mode;
bool tx_fifo_resize;
+ bool usb3_lpm_capable;
unsigned is_utmi_l1_suspend:1;
u8 hird_threshold;
--
2.43.0
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