blob: fddf5cb0235df5e69bd1732c9b2748afb3272a48 [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0+
* Freescale Layerscape MC I/O wrapper
* Copyright (C) 2013-2015 Freescale Semiconductor, Inc.
* Author: German Rivera <>
#include <fsl-mc/fsl_mc_sys.h>
#include <fsl-mc/fsl_mc_cmd.h>
#include <common.h>
#include <errno.h>
#include <asm/io.h>
#define MC_CMD_HDR_READ_CMDID(_hdr) \
((uint16_t)mc_dec((_hdr), MC_CMD_HDR_CMDID_O, MC_CMD_HDR_CMDID_S))
* mc_send_command - Send MC command and wait for response
* @mc_io: Pointer to MC I/O object to be used
* @cmd: MC command buffer. On input, it contains the command to send to the MC.
* On output, it contains the response from the MC if any.
* Depending on the sharing option specified when creating the MC portal
* wrapper, this function will use a spinlock or mutex to ensure exclusive
* access to the MC portal from the point when the command is sent until a
* response is received from the MC.
int mc_send_command(struct fsl_mc_io *mc_io,
struct mc_command *cmd)
enum mc_cmd_status status;
int timeout = 12000;
mc_write_command(mc_io->mmio_regs, cmd);
for ( ; ; ) {
status = mc_read_response(mc_io->mmio_regs, cmd);
if (status != MC_CMD_STATUS_READY)
if (--timeout == 0) {
printf("Error: Timeout waiting for MC response\n");
return -ETIMEDOUT;
if (status != MC_CMD_STATUS_OK) {
printf("Error: MC command failed (portal: %p, obj handle: %#x, command: %#x, status: %#x)\n",
(unsigned int)MC_CMD_HDR_READ_TOKEN(cmd->header),
(unsigned int)MC_CMD_HDR_READ_CMDID(cmd->header),
(unsigned int)status);
return -EIO;
return 0;