Changeset a75f9cbc in mainline for uspace/drv/bus/usb/xhci/hc.c

Timestamp:

2018-01-12T18:49:16Z (6 years ago)

Author:

Ondřej Hlavatý <aearsis@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

e7e99bf

Parents:

129e6f1

git-author:

Ondřej Hlavatý <aearsis@…> (2018-01-12 18:49:04)

git-committer:

Ondřej Hlavatý <aearsis@…> (2018-01-12 18:49:16)

Message:

xhci: try to identify custom speeds

File:

• uspace/drv/bus/usb/xhci/hc.c (modified) (5 diffs)

uspace/drv/bus/usb/xhci/hc.c

@@ -59 +59 @@
         .tx_bps = PSI_TO_BPS(psie, psim) \
 }
-static const xhci_port_speed_t ps_default_full  = PORT_SPEED(FULL, 2, 2, 12);
-static const xhci_port_speed_t ps_default_low   = PORT_SPEED(LOW, 2, 1, 1500);
-static const xhci_port_speed_t ps_default_high  = PORT_SPEED(HIGH, 2, 2, 480);
-static const xhci_port_speed_t ps_default_super = PORT_SPEED(SUPER, 3, 3, 5);
+
+static const xhci_port_speed_t default_psiv_to_port_speed [] = {
+        [1] = PORT_SPEED(FULL, 2, 2, 12),
+        [2] = PORT_SPEED(LOW, 2, 1, 1500),
+        [3] = PORT_SPEED(HIGH, 2, 2, 480),
+        [4] = PORT_SPEED(SUPER, 3, 3, 5),
+};
+
+static const unsigned usb_speed_to_psiv [] = {
+        [USB_SPEED_FULL] = 1,
+        [USB_SPEED_LOW] = 2,
+        [USB_SPEED_HIGH] = 3,
+        [USB_SPEED_SUPER] = 4,
+};
 
 /**
@@ -105 +115 @@
 
                                 if (major == 2) {
-                                        speeds[1] = ps_default_full;
-                                        speeds[2] = ps_default_low;
-                                        speeds[3] = ps_default_high;
-
-                                        hc->speed_to_psiv[USB_SPEED_FULL] = 1;
-                                        hc->speed_to_psiv[USB_SPEED_LOW] = 2;
-                                        hc->speed_to_psiv[USB_SPEED_HIGH] = 3;
+                                        speeds[1] = default_psiv_to_port_speed[1];
+                                        speeds[2] = default_psiv_to_port_speed[2];
+                                        speeds[3] = default_psiv_to_port_speed[3];
                                 } else if (major == 3) {
-                                        speeds[4] = ps_default_super;
-                                        hc->speed_to_psiv[USB_SPEED_SUPER] = 4;
+                                        speeds[4] = default_psiv_to_port_speed[4];
                                 } else {
                                         return EINVAL;
@@ -127 +132 @@
                                         unsigned psie = XHCI_REG_RD(psi, XHCI_PSI_PSIE);
                                         unsigned psim = XHCI_REG_RD(psi, XHCI_PSI_PSIM);
-
+                                        uint64_t bps = PSI_TO_BPS(psie, psim);
+
+                                        /*
+                                         * Speed is not implied, but using one of default PSIV. This is
+                                         * not clearly stated in xHCI spec. There is a clear intention
+                                         * to allow xHCI to specify its own speed parameters, but
+                                         * throughout the document, they used fixed values for e.g.
+                                         * High-speed (3), without stating the controller shall have
+                                         * implied default speeds - and for instance Intel controllers
+                                         * do not. So let's check if the values match and if so, accept
+                                         * the implied USB speed too.
+                                         *
+                                         * The main reason we need this is the usb_speed to have
+                                         * mapping also for devices connected to hubs.
+                                         */
+                                        if (psiv < ARRAY_SIZE(default_psiv_to_port_speed)
+                                           && default_psiv_to_port_speed[psiv].major == major
+                                           && default_psiv_to_port_speed[psiv].minor == minor
+                                           && default_psiv_to_port_speed[psiv].rx_bps == bps
+                                           && default_psiv_to_port_speed[psiv].tx_bps == bps) {
+                                                speeds[psiv] = default_psiv_to_port_speed[psiv];
+                                                usb_log_debug2("Assumed default %s speed of USB %u.", usb_str_speed(speeds[psiv].usb_speed), major);
+                                                continue;
+                                        }
+
+                                        // Custom speed
                                         speeds[psiv].major = major;
                                         speeds[psiv].minor = minor;
                                         str_ncpy(speeds[psiv].name, 4, name.str, 4);
                                         speeds[psiv].usb_speed = USB_SPEED_MAX;
-
-                                        uint64_t bps = PSI_TO_BPS(psie, psim);
 
                                         if (sim == XHCI_PSI_PLT_SYMM || sim == XHCI_PSI_PLT_RX)
@@ -684 +712 @@
         /* Although we have the precise PSIV value on devices of tier 1,
          * we have to rely on reverse mapping on others. */
-        if (!hc->speed_to_psiv[dev->base.speed]) {
-                usb_log_error("Device reported an USB speed that cannot be mapped to HC port speed.");
+        if (!usb_speed_to_psiv[dev->base.speed]) {
+                usb_log_error("Device reported an USB speed (%s) that cannot be mapped to HC port speed.", usb_str_speed(dev->base.speed));
                 return EINVAL;
         }
@@ -707 +735 @@
         XHCI_SLOT_CTX_ENTRIES_SET(ictx->slot_ctx, 1);
         XHCI_SLOT_ROUTE_STRING_SET(ictx->slot_ctx, dev->route_str);
-        XHCI_SLOT_SPEED_SET(ictx->slot_ctx, hc->speed_to_psiv[dev->base.speed]);
+        XHCI_SLOT_SPEED_SET(ictx->slot_ctx, usb_speed_to_psiv[dev->base.speed]);
 
         /* In a very specific case, we have to set also these. But before that,