usb: gadget: dummy_hcd: remove global the_controller variable
The one thing that makes two UDCs+HCDs impossible is the global
the_controller variable. This patch changes this. After device
allocation we allocate the "the_controller" variable and pass it as
platform_data to the UDC and its companion.
We can have now multiple instances dummy hcd and therefore I change the
limit from one to two. I was able to test this with g_ncm adn g_zero:
|# lsusb
|Bus 001 Device 002: ID 0525:a4a0 Netchip Technology, Inc. Linux-USB "Gadget Zero"
|Bus 002 Device 002: ID 0525:a4a1 Netchip Technology, Inc. Linux-USB Ethernet Gadget
|Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
|Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
I was able to start testusb -a and ifconfig usb[01] up with no complains.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
diff --git a/drivers/usb/gadget/dummy_hcd.c b/drivers/usb/gadget/dummy_hcd.c
index 70f70ea..95d584d 100644
--- a/drivers/usb/gadget/dummy_hcd.c
+++ b/drivers/usb/gadget/dummy_hcd.c
@@ -242,8 +242,6 @@
return container_of(dev, struct dummy, gadget.dev);
}
-static struct dummy the_controller;
-
/*-------------------------------------------------------------------------*/
/* SLAVE/GADGET SIDE UTILITY ROUTINES */
@@ -977,9 +975,10 @@
static int dummy_udc_probe(struct platform_device *pdev)
{
- struct dummy *dum = &the_controller;
+ struct dummy *dum;
int rc;
+ dum = *((void **)dev_get_platdata(&pdev->dev));
dum->gadget.name = gadget_name;
dum->gadget.ops = &dummy_ops;
dum->gadget.max_speed = USB_SPEED_SUPER;
@@ -2402,10 +2401,13 @@
static int dummy_setup(struct usb_hcd *hcd)
{
+ struct dummy *dum;
+
+ dum = *((void **)dev_get_platdata(hcd->self.controller));
hcd->self.sg_tablesize = ~0;
if (usb_hcd_is_primary_hcd(hcd)) {
- the_controller.hs_hcd = hcd_to_dummy_hcd(hcd);
- the_controller.hs_hcd->dum = &the_controller;
+ dum->hs_hcd = hcd_to_dummy_hcd(hcd);
+ dum->hs_hcd->dum = dum;
/*
* Mark the first roothub as being USB 2.0.
* The USB 3.0 roothub will be registered later by
@@ -2414,8 +2416,8 @@
hcd->speed = HCD_USB2;
hcd->self.root_hub->speed = USB_SPEED_HIGH;
} else {
- the_controller.ss_hcd = hcd_to_dummy_hcd(hcd);
- the_controller.ss_hcd->dum = &the_controller;
+ dum->ss_hcd = hcd_to_dummy_hcd(hcd);
+ dum->ss_hcd->dum = dum;
hcd->speed = HCD_USB3;
hcd->self.root_hub->speed = USB_SPEED_SUPER;
}
@@ -2528,11 +2530,13 @@
static int dummy_hcd_probe(struct platform_device *pdev)
{
+ struct dummy *dum;
struct usb_hcd *hs_hcd;
struct usb_hcd *ss_hcd;
int retval;
dev_info(&pdev->dev, "%s, driver " DRIVER_VERSION "\n", driver_desc);
+ dum = *((void **)dev_get_platdata(&pdev->dev));
if (!mod_data.is_super_speed)
dummy_hcd.flags = HCD_USB2;
@@ -2565,7 +2569,7 @@
usb_remove_hcd(hs_hcd);
put_usb2_hcd:
usb_put_hcd(hs_hcd);
- the_controller.hs_hcd = the_controller.ss_hcd = NULL;
+ dum->hs_hcd = dum->ss_hcd = NULL;
return retval;
}
@@ -2583,8 +2587,8 @@
usb_remove_hcd(dummy_hcd_to_hcd(dum->hs_hcd));
usb_put_hcd(dummy_hcd_to_hcd(dum->hs_hcd));
- the_controller.hs_hcd = NULL;
- the_controller.ss_hcd = NULL;
+ dum->hs_hcd = NULL;
+ dum->ss_hcd = NULL;
return 0;
}
@@ -2631,7 +2635,7 @@
};
/*-------------------------------------------------------------------------*/
-#define MAX_NUM_UDC 1
+#define MAX_NUM_UDC 2
static struct platform_device *the_udc_pdev[MAX_NUM_UDC];
static struct platform_device *the_hcd_pdev[MAX_NUM_UDC];
@@ -2639,6 +2643,7 @@
{
int retval = -ENOMEM;
int i;
+ struct dummy *dum[MAX_NUM_UDC];
if (usb_disabled())
return -ENODEV;
@@ -2651,6 +2656,7 @@
MAX_NUM_UDC);
return -EINVAL;
}
+
for (i = 0; i < mod_data.num; i++) {
the_hcd_pdev[i] = platform_device_alloc(driver_name, i);
if (!the_hcd_pdev[i]) {
@@ -2669,10 +2675,23 @@
goto err_alloc_udc;
}
}
+ for (i = 0; i < mod_data.num; i++) {
+ dum[i] = kzalloc(sizeof(struct dummy), GFP_KERNEL);
+ if (!dum[i])
+ goto err_add_pdata;
+ retval = platform_device_add_data(the_hcd_pdev[i], &dum[i],
+ sizeof(void *));
+ if (retval)
+ goto err_add_pdata;
+ retval = platform_device_add_data(the_udc_pdev[i], &dum[i],
+ sizeof(void *));
+ if (retval)
+ goto err_add_pdata;
+ }
retval = platform_driver_register(&dummy_hcd_driver);
if (retval < 0)
- goto err_register_hcd_driver;
+ goto err_add_pdata;
retval = platform_driver_register(&dummy_udc_driver);
if (retval < 0)
goto err_register_udc_driver;
@@ -2686,17 +2705,18 @@
goto err_add_hcd;
}
}
- if (!the_controller.hs_hcd ||
- (!the_controller.ss_hcd && mod_data.is_super_speed)) {
- /*
- * The hcd was added successfully but its probe function failed
- * for some reason.
- */
- retval = -EINVAL;
- goto err_add_udc;
+ for (i = 0; i < mod_data.num; i++) {
+ if (!dum[i]->hs_hcd ||
+ (!dum[i]->ss_hcd && mod_data.is_super_speed)) {
+ /*
+ * The hcd was added successfully but its probe
+ * function failed for some reason.
+ */
+ retval = -EINVAL;
+ goto err_add_udc;
+ }
}
-
for (i = 0; i < mod_data.num; i++) {
retval = platform_device_add(the_udc_pdev[i]);
if (retval < 0) {
@@ -2729,7 +2749,9 @@
platform_driver_unregister(&dummy_udc_driver);
err_register_udc_driver:
platform_driver_unregister(&dummy_hcd_driver);
-err_register_hcd_driver:
+err_add_pdata:
+ for (i = 0; i < mod_data.num; i++)
+ kfree(dum[i]);
for (i = 0; i < mod_data.num; i++)
platform_device_put(the_udc_pdev[i]);
err_alloc_udc:
@@ -2744,8 +2766,13 @@
int i;
for (i = 0; i < mod_data.num; i++) {
+ struct dummy *dum;
+
+ dum = *((void **)dev_get_platdata(&the_udc_pdev[i]->dev));
+
platform_device_unregister(the_udc_pdev[i]);
platform_device_unregister(the_hcd_pdev[i]);
+ kfree(dum);
}
platform_driver_unregister(&dummy_udc_driver);
platform_driver_unregister(&dummy_hcd_driver);