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Kernel/Net: E1000ENetworkAdapter detect EEPROM

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The presence of EEPROM is detected by reading the
EE_PRES bit from the EECD register.
This commit is contained in:
Tom Finet 2024-01-22 22:46:37 +00:00 committed by Andrew Kaster
parent 7945c9d808
commit 227aa8f2e4
Notes: sideshowbarker 2024-07-17 08:55:54 +09:00 
Author: https://github.com/TomFinet
Commit: https://github.com/SerenityOS/serenity/commit/227aa8f2e4
Pull-request: https://github.com/SerenityOS/serenity/pull/22907
Reviewed-by: https://github.com/ADKaster ✅
Reviewed-by: https://github.com/LucasChollet ✅
1 changed files with 7 additions and 2 deletions
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9
Kernel/Net/Intel/E1000ENetworkAdapter.cpp
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@ -13,8 +13,13 @@
namespace Kernel {
#define REG_EECD 0x0010
#define REG_EEPROM 0x0014
// EECD Register
#define EECD_PRES 0x100
static bool is_valid_device_id(u16 device_id)
{
// Note: All ids listed here are valid, but only the ones that are verified working are set to 'true'
@ -246,8 +251,8 @@ UNMAP_AFTER_INIT E1000ENetworkAdapter::~E1000ENetworkAdapter() = default;
UNMAP_AFTER_INIT void E1000ENetworkAdapter::detect_eeprom()
{
// FIXME: Try to find a way to detect if EEPROM exists instead of assuming it is
m_has_eeprom = true;
// Section 13.4.3 of https://www.intel.com/content/dam/doc/manual/pci-pci-x-family-gbe-controllers-software-dev-manual.pdf
m_has_eeprom = in32(REG_EECD) & EECD_PRES;
}
UNMAP_AFTER_INIT u32 E1000ENetworkAdapter::read_eeprom(u8 address)