dwc3: core: add support for multiple dwc3 controllers
Added support for multiple dwc3 controllers. This gives uboot
the capability to control multiple dwc3 controllers.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Reviewed-by: Lukasz Majewski <l.majewski@samsung.com>
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 58c3bfd..bd34dbd 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -29,7 +29,7 @@
#include "linux-compat.h"
-struct dwc3 *dwc;
+static LIST_HEAD(dwc3_list);
/* -------------------------------------------------------------------------- */
void dwc3_set_mode(struct dwc3 *dwc, u32 mode)
@@ -612,6 +612,7 @@
*/
int dwc3_uboot_init(struct dwc3_device *dwc3_dev)
{
+ struct dwc3 *dwc;
struct device *dev;
u8 lpm_nyet_threshold;
u8 tx_de_emphasis;
@@ -678,6 +679,8 @@
dwc->hird_threshold = hird_threshold
| (dwc->is_utmi_l1_suspend << 4);
+ dwc->index = dwc3_dev->index;
+
dwc3_cache_hwparams(dwc);
ret = dwc3_alloc_event_buffers(dwc, DWC3_EVENT_BUFFERS_SIZE);
@@ -710,6 +713,8 @@
if (ret)
goto err2;
+ list_add_tail(&dwc->list, &dwc3_list);
+
return 0;
err2:
@@ -729,17 +734,28 @@
* @index: index of this controller
*
* Performs cleanup of memory allocated in dwc3_uboot_init and other misc
- * cleanups (equivalent to dwc3_remove in linux).
+ * cleanups (equivalent to dwc3_remove in linux). index of _this_ controller
+ * should be passed and should match with the index passed in
+ * dwc3_device during init.
*
* Generally called from board file.
*/
-void dwc3_uboot_exit()
+void dwc3_uboot_exit(int index)
{
- dwc3_core_exit_mode(dwc);
- dwc3_event_buffers_cleanup(dwc);
- dwc3_free_event_buffers(dwc);
- dwc3_core_exit(dwc);
- kfree(dwc->mem);
+ struct dwc3 *dwc;
+
+ list_for_each_entry(dwc, &dwc3_list, list) {
+ if (dwc->index != index)
+ continue;
+
+ dwc3_core_exit_mode(dwc);
+ dwc3_event_buffers_cleanup(dwc);
+ dwc3_free_event_buffers(dwc);
+ dwc3_core_exit(dwc);
+ list_del(&dwc->list);
+ kfree(dwc->mem);
+ break;
+ }
}
MODULE_ALIAS("platform:dwc3");