soc/intel/common/block: Move i2c common functions into block/i2c
This patch cleans soc/intel/{apollolake/cannonlake/skylake} by moving
common soc code into common/block/i2c.
BUG=b:78109109
BRANCH=none
TEST=Build and boot KBL/CNL/APL platform.
Change-Id: I88f2f836eee4f80b79486dd8644d1bb3826c5af1
Signed-off-by: Maulik V Vaghela <maulik.v.vaghela@intel.com>
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://review.coreboot.org/26056
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
diff --git a/src/soc/intel/common/block/i2c/i2c.c b/src/soc/intel/common/block/i2c/i2c.c
index 7dd40db..11bd018 100644
--- a/src/soc/intel/common/block/i2c/i2c.c
+++ b/src/soc/intel/common/block/i2c/i2c.c
@@ -13,10 +13,113 @@
* GNU General Public License for more details.
*/
+#include <arch/io.h>
+#include <console/console.h>
+#include <device/device.h>
+#include <device/i2c_simple.h>
#include <device/pci.h>
#include <device/pci_def.h>
#include <device/pci_ids.h>
#include <drivers/i2c/designware/dw_i2c.h>
+#include <intelblocks/chip.h>
+#include <intelblocks/lpss.h>
+#include <soc/iomap.h>
+#include <soc/pci_devs.h>
+
+int dw_i2c_soc_dev_to_bus(struct device *dev)
+{
+ pci_devfn_t devfn = dev->path.pci.devfn;
+ return dw_i2c_soc_devfn_to_bus(devfn);
+}
+
+/* Getting I2C bus configuration from devicetree config */
+const struct dw_i2c_bus_config *dw_i2c_get_soc_cfg(unsigned int bus)
+{
+ const struct soc_intel_common_config *common_config;
+ common_config = chip_get_common_soc_structure();
+
+ return &common_config->i2c[bus];
+}
+
+/* Get base address for early init of I2C controllers. */
+uintptr_t dw_i2c_get_soc_early_base(unsigned int bus)
+{
+ return EARLY_I2C_BASE(bus);
+}
+
+#if !ENV_RAMSTAGE
+static int lpss_i2c_early_init_bus(unsigned int bus)
+{
+ const struct dw_i2c_bus_config *config;
+ const struct device *tree_dev;
+ pci_devfn_t dev;
+ int devfn;
+ uintptr_t base;
+
+ /* Find the PCI device for this bus controller */
+ devfn = dw_i2c_soc_bus_to_devfn(bus);
+ if (devfn < 0) {
+ printk(BIOS_ERR, "I2C%u device not found\n", bus);
+ return -1;
+ }
+
+ /* Look up the controller device in the devicetree */
+ dev = PCI_DEV(0, PCI_SLOT(devfn), PCI_FUNC(devfn));
+ tree_dev = dev_find_slot(0, devfn);
+ if (!tree_dev || !tree_dev->enabled) {
+ printk(BIOS_ERR, "I2C%u device not enabled\n", bus);
+ return -1;
+ }
+
+ /* Skip if not enabled for early init */
+ config = dw_i2c_get_soc_cfg(bus);
+ if (!config || !config->early_init) {
+ printk(BIOS_DEBUG, "I2C%u not enabled for early init\n", bus);
+ return -1;
+ }
+
+ /* Prepare early base address for access before memory */
+ base = dw_i2c_get_soc_early_base(bus);
+ pci_write_config32(dev, PCI_BASE_ADDRESS_0, base);
+ pci_write_config32(dev, PCI_COMMAND,
+ PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
+
+ /* Take device out of reset */
+ lpss_reset_release(base);
+
+ /* Initialize the controller */
+ if (dw_i2c_init(bus, config) < 0) {
+ printk(BIOS_ERR, "I2C%u failed to initialize\n", bus);
+ return -1;
+ }
+
+ return 0;
+}
+
+uintptr_t dw_i2c_base_address(unsigned int bus)
+{
+ int devfn;
+ pci_devfn_t dev;
+ uintptr_t base;
+
+ /* Find device+function for this controller */
+ devfn = dw_i2c_soc_bus_to_devfn(bus);
+ if (devfn < 0)
+ return (uintptr_t)NULL;
+
+ /* Form a PCI address for this device */
+ dev = PCI_DEV(0, PCI_SLOT(devfn), PCI_FUNC(devfn));
+
+ /* Read the first base address for this device */
+ base = ALIGN_DOWN(pci_read_config32(dev, PCI_BASE_ADDRESS_0), 16);
+
+ /* Attempt to initialize bus if base is not set yet */
+ if (!base && !lpss_i2c_early_init_bus(bus))
+ base = ALIGN_DOWN(pci_read_config32(dev, PCI_BASE_ADDRESS_0),
+ 16);
+ return base;
+}
+#else
uintptr_t dw_i2c_base_address(unsigned int bus)
{
@@ -43,12 +146,6 @@
return (uintptr_t)NULL;
}
-int dw_i2c_soc_dev_to_bus(struct device *dev)
-{
- pci_devfn_t devfn = dev->path.pci.devfn;
- return dw_i2c_soc_devfn_to_bus(devfn);
-}
-
static struct device_operations i2c_dev_ops = {
.read_resources = &pci_dev_read_resources,
.set_resources = &pci_dev_set_resources,
@@ -101,3 +198,4 @@
.vendor = PCI_VENDOR_ID_INTEL,
.devices = pci_device_ids,
};
+#endif