diff mbox series

usb: dwc3: qcom: add URS Host support for sdm845 ACPI boot

Message ID 20201230124925.19260-1-shawn.guo@linaro.org
State New
Headers show
Series usb: dwc3: qcom: add URS Host support for sdm845 ACPI boot | expand

Commit Message

Shawn Guo Dec. 30, 2020, 12:49 p.m. UTC 
For sdm845 ACPI boot, the URS (USB Role Switch) node in ACPI DSDT table
holds the memory resource, while interrupt resources reside in the child
nodes USB0 and UFN0.  It adds USB0 host support by probing URS node,
creating platform device for USB0 node, and then retrieve interrupt
resources from USB0 platform device.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
---
 drivers/usb/dwc3/dwc3-qcom.c | 50 +++++++++++++++++++++++++++++++++---
 1 file changed, 47 insertions(+), 3 deletions(-)

Comments

kernel test robot Dec. 30, 2020, 4 p.m. UTC | #1 
Hi Shawn,

I love your patch! Perhaps something to improve:

[auto build test WARNING on balbi-usb/testing/next]
[also build test WARNING on v5.11-rc1 next-20201223]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Shawn-Guo/usb-dwc3-qcom-add-URS-Host-support-for-sdm845-ACPI-boot/20201230-205430
base:   https://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb.git testing/next
config: xtensa-allyesconfig (attached as .config)
compiler: xtensa-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/0day-ci/linux/commit/c3faeb501efb31e035beca1c0fee1cca6ec16392
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Shawn-Guo/usb-dwc3-qcom-add-URS-Host-support-for-sdm845-ACPI-boot/20201230-205430
        git checkout c3faeb501efb31e035beca1c0fee1cca6ec16392
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=xtensa 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

   drivers/usb/dwc3/dwc3-qcom.c: In function 'dwc3_qcom_create_urs_usb_platdev':
   drivers/usb/dwc3/dwc3-qcom.c:675:9: error: implicit declaration of function 'acpi_create_platform_device' [-Werror=implicit-function-declaration]
     675 |  return acpi_create_platform_device(adev, NULL);
         |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/usb/dwc3/dwc3-qcom.c:675:9: warning: returning 'int' from a function with return type 'struct platform_device *' makes pointer from integer without a cast [-Wint-conversion]
     675 |  return acpi_create_platform_device(adev, NULL);
         |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors


vim +675 drivers/usb/dwc3/dwc3-qcom.c

   659	
   660	static struct platform_device *
   661	dwc3_qcom_create_urs_usb_platdev(struct device *dev)
   662	{
   663		struct fwnode_handle *fwh;
   664		struct acpi_device *adev;
   665	
   666		/* Find the first child of URS node */
   667		fwh = fwnode_call_ptr_op(dev->fwnode, get_next_child_node, NULL);
   668		if (!fwh)
   669			return NULL;
   670	
   671		adev = to_acpi_device_node(fwh);
   672		if (!adev)
   673			return NULL;
   674	
 > 675		return acpi_create_platform_device(adev, NULL);
   676	}
   677	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
Shawn Guo Jan. 15, 2021, 3:53 a.m. UTC | #2 
On Wed, Dec 30, 2020 at 08:49:25PM +0800, Shawn Guo wrote:
> For sdm845 ACPI boot, the URS (USB Role Switch) node in ACPI DSDT table

> holds the memory resource, while interrupt resources reside in the child

> nodes USB0 and UFN0.  It adds USB0 host support by probing URS node,

> creating platform device for USB0 node, and then retrieve interrupt

> resources from USB0 platform device.

> 

> Signed-off-by: Shawn Guo <shawn.guo@linaro.org>


Just sent out v2 to search child using node name rather than assuming
it's always the first one.

Shawn
diff mbox series

Patch

diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c
index c703d552bbcf..5b70d34e75ab 100644
--- a/drivers/usb/dwc3/dwc3-qcom.c
+++ b/drivers/usb/dwc3/dwc3-qcom.c
@@ -60,12 +60,14 @@  struct dwc3_acpi_pdata {
 	int			dp_hs_phy_irq_index;
 	int			dm_hs_phy_irq_index;
 	int			ss_phy_irq_index;
+	bool			is_urs;
 };
 
 struct dwc3_qcom {
 	struct device		*dev;
 	void __iomem		*qscratch_base;
 	struct platform_device	*dwc3;
+	struct platform_device	*urs_usb;
 	struct clk		**clks;
 	int			num_clocks;
 	struct reset_control	*resets;
@@ -429,13 +431,15 @@  static void dwc3_qcom_select_utmi_clk(struct dwc3_qcom *qcom)
 static int dwc3_qcom_get_irq(struct platform_device *pdev,
 			     const char *name, int num)
 {
+	struct dwc3_qcom *qcom = platform_get_drvdata(pdev);
+	struct platform_device *pdev_irq = qcom->urs_usb ? qcom->urs_usb : pdev;
 	struct device_node *np = pdev->dev.of_node;
 	int ret;
 
 	if (np)
-		ret = platform_get_irq_byname(pdev, name);
+		ret = platform_get_irq_byname(pdev_irq, name);
 	else
-		ret = platform_get_irq(pdev, num);
+		ret = platform_get_irq(pdev_irq, num);
 
 	return ret;
 }
@@ -568,6 +572,8 @@  static int dwc3_qcom_acpi_register_core(struct platform_device *pdev)
 	struct dwc3_qcom	*qcom = platform_get_drvdata(pdev);
 	struct device		*dev = &pdev->dev;
 	struct resource		*res, *child_res = NULL;
+	struct platform_device	*pdev_irq = qcom->urs_usb ? qcom->urs_usb :
+							    pdev;
 	int			irq;
 	int			ret;
 
@@ -597,7 +603,7 @@  static int dwc3_qcom_acpi_register_core(struct platform_device *pdev)
 	child_res[0].end = child_res[0].start +
 		qcom->acpi_pdata->dwc3_core_base_size;
 
-	irq = platform_get_irq(pdev, 0);
+	irq = platform_get_irq(pdev_irq, 0);
 	child_res[1].flags = IORESOURCE_IRQ;
 	child_res[1].start = child_res[1].end = irq;
 
@@ -651,6 +657,24 @@  static int dwc3_qcom_of_register_core(struct platform_device *pdev)
 	return 0;
 }
 
+static struct platform_device *
+dwc3_qcom_create_urs_usb_platdev(struct device *dev)
+{
+	struct fwnode_handle *fwh;
+	struct acpi_device *adev;
+
+	/* Find the first child of URS node */
+	fwh = fwnode_call_ptr_op(dev->fwnode, get_next_child_node, NULL);
+	if (!fwh)
+		return NULL;
+
+	adev = to_acpi_device_node(fwh);
+	if (!adev)
+		return NULL;
+
+	return acpi_create_platform_device(adev, NULL);
+}
+
 static int dwc3_qcom_probe(struct platform_device *pdev)
 {
 	struct device_node	*np = pdev->dev.of_node;
@@ -715,6 +739,14 @@  static int dwc3_qcom_probe(struct platform_device *pdev)
 			qcom->acpi_pdata->qscratch_base_offset;
 		parent_res->end = parent_res->start +
 			qcom->acpi_pdata->qscratch_base_size;
+
+		if (qcom->acpi_pdata->is_urs) {
+			qcom->urs_usb = dwc3_qcom_create_urs_usb_platdev(dev);
+			if (!qcom->urs_usb) {
+				dev_err(dev, "failed to create URS USB platdev\n");
+				return -ENODEV;
+			}
+		}
 	}
 
 	qcom->qscratch_base = devm_ioremap_resource(dev, parent_res);
@@ -877,8 +909,20 @@  static const struct dwc3_acpi_pdata sdm845_acpi_pdata = {
 	.ss_phy_irq_index = 2
 };
 
+static const struct dwc3_acpi_pdata sdm845_acpi_urs_pdata = {
+	.qscratch_base_offset = SDM845_QSCRATCH_BASE_OFFSET,
+	.qscratch_base_size = SDM845_QSCRATCH_SIZE,
+	.dwc3_core_base_size = SDM845_DWC3_CORE_SIZE,
+	.hs_phy_irq_index = 1,
+	.dp_hs_phy_irq_index = 4,
+	.dm_hs_phy_irq_index = 3,
+	.ss_phy_irq_index = 2,
+	.is_urs = true,
+};
+
 static const struct acpi_device_id dwc3_qcom_acpi_match[] = {
 	{ "QCOM2430", (unsigned long)&sdm845_acpi_pdata },
+	{ "QCOM0304", (unsigned long)&sdm845_acpi_urs_pdata },
 	{ },
 };
 MODULE_DEVICE_TABLE(acpi, dwc3_qcom_acpi_match);