diff options
Diffstat (limited to 'common')
| -rw-r--r-- | common/usb.c | 11 | ||||
| -rw-r--r-- | common/usb_hub.c | 19 |
2 files changed, 25 insertions, 5 deletions
diff --git a/common/usb.c b/common/usb.c index 60daa10..bd0f8d5 100644 --- a/common/usb.c +++ b/common/usb.c @@ -34,7 +34,7 @@ #include <asm/byteorder.h> #include <asm/unaligned.h> #include <compiler.h> - +#include <errno.h> #include <usb.h> #ifdef CONFIG_4xx #include <asm/4xx_pci.h> @@ -60,6 +60,7 @@ int usb_init(void) void *ctrl; struct usb_device *dev; int i, start_index = 0; + int ret; dev_index = 0; asynch_allowed = 1; @@ -75,7 +76,13 @@ int usb_init(void) for (i = 0; i < CONFIG_USB_MAX_CONTROLLER_COUNT; i++) { /* init low_level USB */ printf("USB%d: ", i); - if (usb_lowlevel_init(i, USB_INIT_HOST, &ctrl)) { + ret = usb_lowlevel_init(i, USB_INIT_HOST, &ctrl); + if (ret == -ENODEV) { /* No such device. */ + puts("Port not available.\n"); + continue; + } + + if (ret) { /* Other error. */ puts("lowlevel init failed\n"); continue; } diff --git a/common/usb_hub.c b/common/usb_hub.c index 2add4b9..c416e5e 100644 --- a/common/usb_hub.c +++ b/common/usb_hub.c @@ -209,9 +209,22 @@ int hub_port_reset(struct usb_device *dev, int port, (portstatus & USB_PORT_STAT_CONNECTION) ? 1 : 0, (portstatus & USB_PORT_STAT_ENABLE) ? 1 : 0); - if ((portchange & USB_PORT_STAT_C_CONNECTION) || - !(portstatus & USB_PORT_STAT_CONNECTION)) - return -1; + /* + * Perhaps we should check for the following here: + * - C_CONNECTION hasn't been set. + * - CONNECTION is still set. + * + * Doing so would ensure that the device is still connected + * to the bus, and hasn't been unplugged or replaced while the + * USB bus reset was going on. + * + * However, if we do that, then (at least) a San Disk Ultra + * USB 3.0 16GB device fails to reset on (at least) an NVIDIA + * Tegra Jetson TK1 board. For some reason, the device appears + * to briefly drop off the bus when this second bus reset is + * executed, yet if we retry this loop, it'll eventually come + * back after another reset or two. + */ if (portstatus & USB_PORT_STAT_ENABLE) break; |