soc/intel/common/block: Enable PMC IPC driver

In order for USB Type-C devices to be detected prior to loading Kernel
PMC IPC driver API is needed to send IPC commands to the PMC to update
connection/disconnection states.

BUG=b:151731851
BRANCH=none
TEST=built coreboot image and booted to Chrome OS

Change-Id: Ide3528975be23585ce305f6cc909767b96af200f
Signed-off-by: Brandon Breitenstein <brandon.breitenstein@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42077
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>

1 files changed, 49 insertions, 0 deletions

diff --git a/src/soc/intel/common/block/include/intelblocks/pmc_ipc.h b/src/soc/intel/common/block/include/intelblocks/pmc_ipc.h
new file mode 100644
index 0000000000..0c90cd7df6
--- /dev/null
+++ b/src/soc/intel/common/block/include/intelblocks/pmc_ipc.h
@@ -0,0 +1,49 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef SOC_INTEL_COMMON_BLOCK_PMC_IPC_H
+#define SOC_INTEL_COMMON_BLOCK_PMC_IPC_H
+
+#include <types.h>
+
+#define PMC_IPC_BUF_COUNT		4
+
+#define PMC_IPC_CMD_COMMAND_SHIFT	0
+#define PMC_IPC_CMD_COMMAND_MASK	0xff
+#define PMC_IPC_CMD_MSI_SHIFT		8
+#define PMC_IPC_CMD_MSI_MASK		0x01
+#define PMC_IPC_CMD_SUB_COMMAND_SHIFT	12
+#define PMC_IPC_CMD_SUB_COMMAND_MASK	0x0f
+#define PMC_IPC_CMD_SIZE_SHIFT		16
+#define PMC_IPC_CMD_SIZE_MASK		0xff
+
+#define PMC_IPC_CMD_FIELD(name, val) \
+	(((val) & PMC_IPC_CMD_##name##_MASK << PMC_IPC_CMD_##name##_SHIFT))
+
+#define PMC_IPC_CMD_NO_MSI		0
+
+/*
+ * Create the IPC CMD to send to PMC
+ */
+static inline uint32_t pmc_make_ipc_cmd(uint32_t cmd, uint32_t subcmd,
+					uint32_t size)
+{
+	return PMC_IPC_CMD_FIELD(COMMAND, cmd) |
+		PMC_IPC_CMD_FIELD(SUB_COMMAND, subcmd) |
+		PMC_IPC_CMD_FIELD(MSI, PMC_IPC_CMD_NO_MSI) |
+		PMC_IPC_CMD_FIELD(SIZE, size);
+}
+
+/*
+ * Buffer for holding write and read buffers of IPC commands
+ */
+struct pmc_ipc_buffer {
+	uint32_t buf[PMC_IPC_BUF_COUNT];
+};
+
+/*
+ * Send PMC IPC command
+ */
+enum cb_err pmc_send_ipc_cmd(uint32_t cmd, const struct pmc_ipc_buffer *wbuf,
+			     struct pmc_ipc_buffer *rbuf);
+
+#endif /* SOC_INTEL_COMMON_BLOCK_PMC_IPC_H */