diff options
Diffstat (limited to 'src/drivers/i2c/i2cmux')
-rw-r--r-- | src/drivers/i2c/i2cmux/Config.lb | 2 | ||||
-rw-r--r-- | src/drivers/i2c/i2cmux/chip.h | 4 | ||||
-rw-r--r-- | src/drivers/i2c/i2cmux/i2cmux.c | 44 |
3 files changed, 50 insertions, 0 deletions
diff --git a/src/drivers/i2c/i2cmux/Config.lb b/src/drivers/i2c/i2cmux/Config.lb new file mode 100644 index 0000000000..6bce919d5d --- /dev/null +++ b/src/drivers/i2c/i2cmux/Config.lb @@ -0,0 +1,2 @@ +config chip.h +object i2cmux.o diff --git a/src/drivers/i2c/i2cmux/chip.h b/src/drivers/i2c/i2cmux/chip.h new file mode 100644 index 0000000000..ffaf87954a --- /dev/null +++ b/src/drivers/i2c/i2cmux/chip.h @@ -0,0 +1,4 @@ +extern struct chip_operations drivers_i2c_i2cmux_ops; + +struct drivers_i2c_i2cmux_config { +}; diff --git a/src/drivers/i2c/i2cmux/i2cmux.c b/src/drivers/i2c/i2cmux/i2cmux.c new file mode 100644 index 0000000000..512b19f48a --- /dev/null +++ b/src/drivers/i2c/i2cmux/i2cmux.c @@ -0,0 +1,44 @@ +#include <console/console.h> +#include <device/device.h> +#include <device/smbus.h> +#include <device/pci.h> +#include <device/pci_ids.h> +#include <device/pci_ops.h> +#include <cpu/x86/msr.h> +#include "chip.h" + +static void i2cmux_set_link(device_t dev, unsigned int link) +{ + if (dev->enabled && dev->path.type == DEVICE_PATH_I2C) + { + if(ops_smbus_bus(get_pbus_smbus(dev))) { + smbus_write_byte(dev, 0x01, 1<<link); // output value + smbus_write_byte(dev, 0x03, 0); // all output + } + + } + +} +static void i2cmux_noop(device_t dummy) +{ +} + +static struct device_operations i2cmux_operations = { + .read_resources = i2cmux_noop, + .set_resources = i2cmux_noop, + .enable_resources = i2cmux_noop, + .init = i2cmux_noop, + .scan_bus = scan_static_bus, + .set_link = i2cmux_set_link, +}; + +static void enable_dev(struct device *dev) +{ + if(dev->links>0) + dev->ops = &i2cmux_operations; +} + +struct chip_operations drivers_i2c_i2cmux_ops = { + CHIP_NAME("i2cmux") + .enable_dev = enable_dev, +}; |