8000 Expose bus configuration values in IORegistry by ben9923 · Pull Request #425 · VoodooI2C/VoodooI2C · GitHub
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Expose bus configuration values in IORegistry #425

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Merged
merged 1 commit into from
Dec 26, 2020
Merged

Expose bus configuration values in IORegistry #425

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19 changes: 19 additions & 0 deletions VoodooI2C/VoodooI2C/VoodooI2CController/VoodooI2CControllerDriver.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -40,6 +40,23 @@ IOReturn VoodooI2CControllerDriver::getBusConfig() {
return kIOReturnSuccess;
}

IOReturn VoodooI2CControllerDriver::setBusConfigProperties() {
OSDictionary* properties = OSDictionary::withCapacity(5);
if (!properties)
return kIOReturnNoMemory;

setOSDictionaryNumber(properties, "SS_HCNT", bus_device.acpi_config.ss_hcnt);
setOSDictionaryNumber(properties, "SS_LCNT", bus_device.acpi_config.ss_lcnt);
setOSDictionaryNumber(properties, "FS_HCNT", bus_device.acpi_config.fs_hcnt);
setOSDictionaryNumber(properties, "FS_LCNT", bus_device.acpi_config.fs_lcnt);
setOSDictionaryNumber(properties, "SDA_HOLD", bus_device.acpi_config.sda_hold);

setProperty("BusConfig", properties);
OSSafeReleaseNULL(properties);

return kIOReturnSuccess;
}

void VoodooI2CControllerDriver::handleAbortI2C() {
IOLog("%s::%s I2C Transaction error details\n", getName(), bus_device.name);

Expand Down Expand Up @@ -458,6 +475,8 @@ bool VoodooI2CControllerDriver::start(IOService* provider) {
IOLog("%s::%s Got bus configuration values\n", getName(), bus_device.name);
}

setBusConfigProperties();

bus_device.functionality = I2C_FUNC_I2C | I2C_FUNC_10BIT_ADDR | I2C_FUNC_SMBUS_BYTE | I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA | I2C_FUNC_SMBUS_I2C_BLOCK;
bus_device.bus_config = DW_IC_CON_MASTER | DW_IC_CON_SLAVE_DISABLE | DW_IC_CON_RESTART_EN | DW_IC_CON_SPEED_FAST;

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7 changes: 7 additions & 0 deletions VoodooI2C/VoodooI2C/VoodooI2CController/VoodooI2CControllerDriver.hpp
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Expand Up @@ -161,6 +161,13 @@ class EXPORT VoodooI2CControllerDriver : public IOService {

IOReturn getBusConfig();

/* Set bus configuration values in the IORegistry.
*
* @return *kIOReturnSuccess* if setting succeeded, *kIOReturnNoMemory* on allocation failure.
*/

IOReturn setBusConfigProperties();

/* Prints an error message when the bus reports a transaction error */

void handleAbortI2C();
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0