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

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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.

Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Link: https://lore.kernel.org/r/20210115035057.10994-1-shawn.guo@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Shawn Guo 2021-01-15 11:50:57 +08:00 committed by Greg Kroah-Hartman
parent 9136972055
commit c25c210f59
1 changed files with 56 additions and 3 deletions
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59
drivers/usb/dwc3/dwc3-qcom.c
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@ -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 +657,33 @@ 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;
char name[8];
int ret;
int id;
/* Figure out device id */
ret = sscanf(fwnode_get_name(dev->fwnode), "URS%d", &id);
if (!ret)
return NULL;
/* Find the child using name */
snprintf(name, sizeof(name), "USB%d", id);
fwh = fwnode_get_named_child_node(dev->fwnode, name);
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 +748,14 @@ 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 +918,20 @@ 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);