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lx_kit(x86): restrict usb heuristics to usb

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Issue #4450
This commit is contained in:
Alexander Boettcher 2022-03-15 12:05:38 +01:00 committed by Christian Helmuth
parent cda0fafbd1
commit 6d924d3285
2 changed files with 32 additions and 20 deletions
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1
repos/dde_linux/src/include/spec/x86/lx_kit/platform_session/device.h
View File

@ -51,6 +51,7 @@ class Platform::Device : Interface, Noncopyable
Connection &_platform;
Legacy_platform::Device_capability _device_cap { };
Name _name { };
unsigned _class_code { };
public:

51
repos/dde_linux/src/lib/lx_kit/spec/x86/platform.cc
View File

@ -272,6 +272,9 @@ Platform::Device::Device(Connection &platform, Name name)
error(__func__, ": could not get device capability");
throw -1;
}
Legacy_platform::Device_client device(_device_cap);
_class_code = device.class_code() >> 8;
}
@ -311,29 +314,37 @@ void Platform::Device::Config_space::write(unsigned char address,
return;
}
/* reject writes to unknown addresses */
switch (address) {
case 0x04:
enum {
CLASS_CODE_USB = 0xc03,
};
switch(_device._class_code) {
case CLASS_CODE_USB:
/* reject writes to unknown addresses */
switch (address) {
case 0x04:
/*
* Doing this multiple times induces multiple "assignment of PCI
* device" diasgnostics currently.
*/
/* command register (value for enable io, memory, bus master) */
value = 7;
break;
/*
* Doing this multiple times induces multiple "assignment of PCI
* device" diasgnostics currently.
* Write in [0x40,0xff] should be okay if there are is no capability
* list (status register bit 4 + capability list pointer). Otherwise,
* writes into capability-list entries should be rejected.
*/
/* command register (value for enable io, memory, bus master) */
value = 7;
case 0xc0: /* UHCI BIOS handoff (UHCI_USBLEGSUP) */ break;
case 0xc4: /* UHCI INTEL resume-enable (USBRES_INTEL) */ break;
case 0x60 ... 0x6f: /* EHCI BIOS handoff (just empiric, address not fixed) */ break;
default:
return;
}
break;
/*
* Write in [0x40,0xff] should be okay if there are is no capability
* list (status register bit 4 + capability list pointer). Otherwise,
* writes into capability-list entries should be rejected.
*/
case 0xc0: /* UHCI BIOS handoff (UHCI_USBLEGSUP) */ break;
case 0xc4: /* UHCI INTEL resume-enable (USBRES_INTEL) */ break;
case 0x60 ... 0x6f: /* EHCI BIOS handoff (just empiric, address not fixed) */ break;
default:
return;
}
Legacy_platform::Device::Access_size const as = convert(size);