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From 2a2c64f6ea62337c1263a70f6ca9a9bade66b78b Mon Sep 17 00:00:00 2001
From: Patrick Rudolph <patrick.rudolph@9elements.com>
Date: Thu, 3 Dec 2020 13:44:55 +0100
Subject: [PATCH 7/8] grub-core/bus/usb/usbhub: Add xHCI non root hub support
Tested on Intel PCH C246, the USB3 hub can be configured by grub.
Issues:
* USB3 devices connected behind that hub are sometimes not detected.
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
---
grub-core/bus/usb/usbhub.c | 38 +++++++++++++++++++++++++++++++++-----
include/grub/usbdesc.h | 1 +
include/grub/usbtrans.h | 4 ++++
3 files changed, 38 insertions(+), 5 deletions(-)
diff --git a/grub-core/bus/usb/usbhub.c b/grub-core/bus/usb/usbhub.c
index b4b3a1a61..e96505aa9 100644
--- a/grub-core/bus/usb/usbhub.c
+++ b/grub-core/bus/usb/usbhub.c
@@ -148,19 +148,32 @@ grub_usb_hub_add_dev (grub_usb_controller_t controller,
return dev;
}
-
+static grub_usb_err_t
+grub_usb_set_hub_depth(grub_usb_device_t dev, grub_uint8_t depth)
+{
+ return grub_usb_control_msg (dev, (GRUB_USB_REQTYPE_OUT
+ | GRUB_USB_REQTYPE_CLASS
+ | GRUB_USB_REQTYPE_TARGET_DEV),
+ GRUB_USB_HUB_REQ_SET_HUB_DEPTH, depth,
+ 0, 0, NULL);
+}
+
static grub_usb_err_t
grub_usb_add_hub (grub_usb_device_t dev)
{
struct grub_usb_usb_hubdesc hubdesc;
grub_usb_err_t err;
+ grub_uint16_t req;
int i;
+ req = (dev->speed == GRUB_USB_SPEED_SUPER) ? GRUB_USB_DESCRIPTOR_SS_HUB :
+ GRUB_USB_DESCRIPTOR_HUB;
+
err = grub_usb_control_msg (dev, (GRUB_USB_REQTYPE_IN
| GRUB_USB_REQTYPE_CLASS
| GRUB_USB_REQTYPE_TARGET_DEV),
- GRUB_USB_REQ_GET_DESCRIPTOR,
- (GRUB_USB_DESCRIPTOR_HUB << 8) | 0,
+ GRUB_USB_REQ_GET_DESCRIPTOR,
+ (req << 8) | 0,
0, sizeof (hubdesc), (char *) &hubdesc);
if (err)
return err;
@@ -183,6 +196,19 @@ grub_usb_add_hub (grub_usb_device_t dev)
return GRUB_USB_ERR_INTERNAL;
}
+ if (dev->speed == GRUB_USB_SPEED_SUPER)
+ {
+ grub_uint8_t depth;
+ grub_uint32_t route;
+ /* Depth maximum value is 5, but root hubs doesn't count */
+ for (depth = 0, route = dev->route; (route & 0xf) > 0; route >>= 4)
+ depth++;
+
+ err = grub_usb_set_hub_depth(dev, depth);
+ if (err)
+ return err;
+ }
+
/* Power on all Hub ports. */
for (i = 1; i <= hubdesc.portcnt; i++)
{
@@ -637,7 +663,9 @@ poll_nonroot_hub (grub_usb_device_t dev)
int split_hubaddr = 0;
/* Determine the device speed. */
- if (status & GRUB_USB_HUB_STATUS_PORT_LOWSPEED)
+ if (dev->speed == GRUB_USB_SPEED_SUPER)
+ speed = GRUB_USB_SPEED_SUPER;
+ else if (status & GRUB_USB_HUB_STATUS_PORT_LOWSPEED)
speed = GRUB_USB_SPEED_LOW;
else
{
@@ -651,7 +679,7 @@ poll_nonroot_hub (grub_usb_device_t dev)
grub_millisleep (10);
/* Find correct values for SPLIT hubport and hubaddr */
- if (speed == GRUB_USB_SPEED_HIGH)
+ if (speed == GRUB_USB_SPEED_HIGH || speed == GRUB_USB_SPEED_SUPER)
{
/* HIGH speed device needs not transaction translation */
split_hubport = 0;
diff --git a/include/grub/usbdesc.h b/include/grub/usbdesc.h
index bb2ab2e27..1697aa465 100644
--- a/include/grub/usbdesc.h
+++ b/include/grub/usbdesc.h
@@ -30,6 +30,7 @@ typedef enum {
GRUB_USB_DESCRIPTOR_ENDPOINT,
GRUB_USB_DESCRIPTOR_DEBUG = 10,
GRUB_USB_DESCRIPTOR_HUB = 0x29,
+ GRUB_USB_DESCRIPTOR_SS_HUB = 0x2a,
GRUB_USB_DESCRIPTOR_SS_ENDPOINT_COMPANION = 0x30
} grub_usb_descriptor_t;
diff --git a/include/grub/usbtrans.h b/include/grub/usbtrans.h
index 039ebed65..d6c3f71dc 100644
--- a/include/grub/usbtrans.h
+++ b/include/grub/usbtrans.h
@@ -110,6 +110,10 @@ enum
GRUB_USB_REQ_SET_INTERFACE = 0x0B,
GRUB_USB_REQ_SYNC_FRAME = 0x0C
};
+enum
+ {
+ GRUB_USB_HUB_REQ_SET_HUB_DEPTH = 0x0C,
+ };
#define GRUB_USB_FEATURE_ENDP_HALT 0x00
#define GRUB_USB_FEATURE_DEV_REMOTE_WU 0x01
--
2.39.2
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