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-rw-r--r--payloads/libpayload/drivers/usb/ehci.c49
-rw-r--r--payloads/libpayload/drivers/usb/ehci_private.h2
-rw-r--r--payloads/libpayload/drivers/usb/usb.c12
-rw-r--r--payloads/libpayload/include/usb/usb.h2
4 files changed, 53 insertions, 12 deletions
diff --git a/payloads/libpayload/drivers/usb/ehci.c b/payloads/libpayload/drivers/usb/ehci.c
index 9500059590..c8f469e606 100644
--- a/payloads/libpayload/drivers/usb/ehci.c
+++ b/payloads/libpayload/drivers/usb/ehci.c
@@ -61,6 +61,30 @@ static void ehci_shutdown (hci_t *controller)
enum { EHCI_OUT=0, EHCI_IN=1, EHCI_SETUP=2 };
+/*
+ * returns the address of the closest USB2.0 hub, which is responsible for
+ * split transactions, along with the number of the used downstream port
+ */
+static int closest_usb2_hub(const usbdev_t *dev, int *const addr, int *const port)
+{
+ const usbdev_t *usb1dev;
+ do {
+ usb1dev = dev;
+ if ((dev->hub > 0) && (dev->hub < 128))
+ dev = dev->controller->devices[dev->hub];
+ else
+ dev = NULL;
+ } while (dev && (dev->speed < 2));
+ if (dev) {
+ *addr = usb1dev->hub;
+ *port = usb1dev->port;
+ return 0;
+ } else {
+ debug("ehci: Couldn't find closest USB2.0 hub.\n");
+ return 1;
+ }
+}
+
/* returns handled bytes. assumes that the fields it writes are empty on entry */
static int fill_td(qtd_t *td, void* data, int datalen)
{
@@ -140,6 +164,13 @@ static int ehci_bulk (endpoint_t *ep, int size, u8 *data, int finalize)
int endp = ep->endpoint & 0xf;
int pid = (ep->direction==IN)?EHCI_IN:EHCI_OUT;
+ int hubaddr = 0, hubport = 0;
+ if (ep->dev->speed < 2) {
+ /* we need a split transaction */
+ if (closest_usb2_hub(ep->dev, &hubaddr, &hubport))
+ return 1;
+ }
+
qtd_t *head = memalign(32, sizeof(qtd_t));
qtd_t *cur = head;
while (1) {
@@ -173,7 +204,9 @@ static int ehci_bulk (endpoint_t *ep, int size, u8 *data, int finalize)
(1 << QH_RECLAIM_HEAD_SHIFT) |
(ep->maxpacketsize << QH_MPS_SHIFT) |
(0 << QH_NAK_CNT_SHIFT);
- qh->epcaps = 3 << QH_PIPE_MULTIPLIER_SHIFT;
+ qh->epcaps = (3 << QH_PIPE_MULTIPLIER_SHIFT) |
+ (hubport << QH_PORT_NUMBER_SHIFT) |
+ (hubaddr << QH_HUB_ADDRESS_SHIFT);
qh->td.next_qtd = virt_to_phys(head);
qh->td.token |= (ep->toggle?QTD_TOGGLE_DATA1:0);
@@ -209,6 +242,14 @@ static int ehci_control (usbdev_t *dev, direction_t dir, int drlen, void *devreq
int mlen = dev->endpoints[0].maxpacketsize;
int result = 0;
+ int hubaddr = 0, hubport = 0, non_hs_ctrl_ep = 0;
+ if (dev->speed < 2) {
+ /* we need a split transaction */
+ if (closest_usb2_hub(dev, &hubaddr, &hubport))
+ return 1;
+ non_hs_ctrl_ep = 1;
+ }
+
/* create qTDs */
qtd_t *head = memalign(32, sizeof(qtd_t));
qtd_t *cur = head;
@@ -263,9 +304,11 @@ static int ehci_control (usbdev_t *dev, direction_t dir, int drlen, void *devreq
(1 << QH_DTC_SHIFT) | /* ctrl transfers are special: take toggle bit from TD */
(1 << QH_RECLAIM_HEAD_SHIFT) |
(mlen << QH_MPS_SHIFT) |
- (0 << QH_NON_HS_CTRL_EP_SHIFT) | /* no non-HS device support yet */
+ (non_hs_ctrl_ep << QH_NON_HS_CTRL_EP_SHIFT) |
(0 << QH_NAK_CNT_SHIFT);
- qh->epcaps = 3 << QH_PIPE_MULTIPLIER_SHIFT;
+ qh->epcaps = (3 << QH_PIPE_MULTIPLIER_SHIFT) |
+ (hubport << QH_PORT_NUMBER_SHIFT) |
+ (hubaddr << QH_HUB_ADDRESS_SHIFT);
qh->td.next_qtd = virt_to_phys(head);
/* hook up QH */
diff --git a/payloads/libpayload/drivers/usb/ehci_private.h b/payloads/libpayload/drivers/usb/ehci_private.h
index 8ac15b3093..29595f8f2f 100644
--- a/payloads/libpayload/drivers/usb/ehci_private.h
+++ b/payloads/libpayload/drivers/usb/ehci_private.h
@@ -116,6 +116,8 @@ typedef volatile struct {
#define QH_NON_HS_CTRL_EP_SHIFT 27
#define QH_NAK_CNT_SHIFT 28
u32 epcaps;
+#define QH_HUB_ADDRESS_SHIFT 16
+#define QH_PORT_NUMBER_SHIFT 23
#define QH_PIPE_MULTIPLIER_SHIFT 30
volatile u32 current_td_ptr;
volatile qtd_t td;
diff --git a/payloads/libpayload/drivers/usb/usb.c b/payloads/libpayload/drivers/usb/usb.c
index 1e8f24814c..07735a2097 100644
--- a/payloads/libpayload/drivers/usb/usb.c
+++ b/payloads/libpayload/drivers/usb/usb.c
@@ -245,8 +245,8 @@ get_free_address (hci_t *controller)
return -1; // no free address
}
-int
-set_address (hci_t *controller, int speed)
+static int
+set_address (hci_t *controller, int speed, int hubport, int hubaddr)
{
int adr = get_free_address (controller); // address to set
dev_req_t dr;
@@ -266,6 +266,8 @@ set_address (hci_t *controller, int speed)
usbdev_t *dev = controller->devices[adr];
// dummy values for registering the address
dev->address = 0;
+ dev->hub = hubaddr;
+ dev->port = hubport;
dev->speed = speed;
dev->endpoints[0].dev = dev;
dev->endpoints[0].endpoint = 0;
@@ -469,14 +471,10 @@ usb_attach_device(hci_t *controller, int hubaddress, int port, int speed)
{
static const char* speeds[] = { "full", "low", "high" };
debug ("%sspeed device\n", (speed <= 2) ? speeds[speed] : "invalid value - no");
- int newdev = set_address (controller, speed);
+ int newdev = set_address (controller, speed, port, hubaddress);
if (newdev == -1)
return -1;
usbdev_t *newdev_t = controller->devices[newdev];
-
- newdev_t->address = newdev;
- newdev_t->hub = hubaddress;
- newdev_t->port = port;
// determine responsible driver - current done in set_address
newdev_t->init (newdev_t);
return newdev;
diff --git a/payloads/libpayload/include/usb/usb.h b/payloads/libpayload/include/usb/usb.h
index 05ced4907a..ee9c50bb85 100644
--- a/payloads/libpayload/include/usb/usb.h
+++ b/payloads/libpayload/include/usb/usb.h
@@ -223,8 +223,6 @@ void usb_hub_init (usbdev_t *dev);
void usb_hid_init (usbdev_t *dev);
void usb_msc_init (usbdev_t *dev);
-int set_address (hci_t *controller, int speed);
-
u8 *get_descriptor (usbdev_t *dev, unsigned char bmRequestType,
int descType, int descIdx, int langID);
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-03 17:31:22 +0000