net/fsl-mc/mc_sys.c

1 // SPDX-License-Identifier: GPL-2.0+
3  * Freescale Layerscape MC I/O wrapper
5  * Copyright (C) 2013-2015 Freescale Semiconductor, Inc.
9 #include <fsl-mc/fsl_mc_sys.h>
10 #include <fsl-mc/fsl_mc_cmd.h>
19  * mc_send_command - Send MC command and wait for response
21  * @mc_io: Pointer to MC I/O object to be used
22  * @cmd: MC command buffer. On input, it contains the command to send to the MC.
23  * On output, it contains the response from the MC if any.
25  * Depending on the sharing option specified when creating the MC portal
27  * access to the MC portal from the point when the command is sent until a
28  * response is received from the MC.
36 	mc_write_command(mc_io->mmio_regs, cmd);  in mc_send_command()
39 		status = mc_read_response(mc_io->mmio_regs, cmd);  in mc_send_command()
43 		if (--timeout == 0) {  in mc_send_command()
44 			printf("Error: Timeout waiting for MC response\n");  in mc_send_command()
45 			return -ETIMEDOUT;  in mc_send_command()
52 		printf("Error: MC command failed (portal: %p, obj handle: %#x, command: %#x, status: %#x)\n",  in mc_send_command()
53 		       mc_io->mmio_regs,  in mc_send_command()
54 			(unsigned int)MC_CMD_HDR_READ_TOKEN(cmd->header),  in mc_send_command()
55 		       (unsigned int)MC_CMD_HDR_READ_CMDID(cmd->header),  in mc_send_command()
58 		return -EIO;  in mc_send_command()