diff options
Diffstat (limited to 'src/soc/intel/skylake/i2c.c')
| -rw-r--r-- | src/soc/intel/skylake/i2c.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/src/soc/intel/skylake/i2c.c b/src/soc/intel/skylake/i2c.c index 76e7bf1015..64d39cddb2 100644 --- a/src/soc/intel/skylake/i2c.c +++ b/src/soc/intel/skylake/i2c.c @@ -14,16 +14,66 @@ */ #include <device/device.h> +#include <device/i2c.h> #include <device/pci.h> #include <device/pci_ids.h> +#include <soc/intel/common/lpss_i2c.h> #include <soc/ramstage.h> +uintptr_t lpss_i2c_base_address(unsigned bus) +{ + unsigned devfn; + struct device *dev; + struct resource *res; + + /* bus -> devfn */ + devfn = i2c_bus_to_devfn(bus); + if (devfn >= 0) { + /* devfn -> dev */ + dev = dev_find_slot(0, devfn); + if (dev) { + /* dev -> bar0 */ + res = find_resource(dev, PCI_BASE_ADDRESS_0); + if (res) + return res->base; + } + } + + return (uintptr_t)NULL; +} + +static int i2c_dev_to_bus(struct device *dev) +{ + return i2c_devfn_to_bus(dev->path.pci.devfn); +} + +/* + * The device should already be enabled and out of reset, + * either from early init in coreboot or SiliconInit in FSP. + */ +static void i2c_dev_init(struct device *dev) +{ + struct soc_intel_skylake_config *config = dev->chip_info; + int bus = i2c_dev_to_bus(dev); + + if (!config || bus < 0) + return; + + lpss_i2c_init(bus, config->i2c[bus].speed ? : I2C_SPEED_FAST); +} + +static struct i2c_bus_operations i2c_bus_ops = { + .dev_to_bus = &i2c_dev_to_bus, +}; + static struct device_operations i2c_dev_ops = { .read_resources = &pci_dev_read_resources, .set_resources = &pci_dev_set_resources, .enable_resources = &pci_dev_enable_resources, .scan_bus = &scan_smbus, .ops_pci = &soc_pci_ops, + .ops_i2c_bus = &i2c_bus_ops, + .init = &i2c_dev_init, }; static const unsigned short pci_device_ids[] = { |