mirror of
https://github.com/brain-hackers/u-boot-brain
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83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
63 lines
1.7 KiB
C
63 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Freescale Layerscape MC I/O wrapper
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*
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* Copyright (C) 2013-2015 Freescale Semiconductor, Inc.
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* Author: German Rivera <German.Rivera@freescale.com>
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*/
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#include <fsl-mc/fsl_mc_sys.h>
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#include <fsl-mc/fsl_mc_cmd.h>
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#include <common.h>
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#include <errno.h>
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#include <asm/io.h>
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#define MC_CMD_HDR_READ_CMDID(_hdr) \
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((uint16_t)mc_dec((_hdr), MC_CMD_HDR_CMDID_O, MC_CMD_HDR_CMDID_S))
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/**
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* mc_send_command - Send MC command and wait for response
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*
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* @mc_io: Pointer to MC I/O object to be used
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* @cmd: MC command buffer. On input, it contains the command to send to the MC.
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* On output, it contains the response from the MC if any.
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*
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* Depending on the sharing option specified when creating the MC portal
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* wrapper, this function will use a spinlock or mutex to ensure exclusive
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* access to the MC portal from the point when the command is sent until a
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* response is received from the MC.
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*/
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int mc_send_command(struct fsl_mc_io *mc_io,
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struct mc_command *cmd)
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{
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enum mc_cmd_status status;
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int timeout = 12000;
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mc_write_command(mc_io->mmio_regs, cmd);
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for ( ; ; ) {
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status = mc_read_response(mc_io->mmio_regs, cmd);
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if (status != MC_CMD_STATUS_READY)
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break;
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if (--timeout == 0) {
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printf("Error: Timeout waiting for MC response\n");
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return -ETIMEDOUT;
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}
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udelay(500);
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}
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if (status != MC_CMD_STATUS_OK) {
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printf("Error: MC command failed (portal: %p, obj handle: %#x, command: %#x, status: %#x)\n",
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mc_io->mmio_regs,
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(unsigned int)MC_CMD_HDR_READ_TOKEN(cmd->header),
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(unsigned int)MC_CMD_HDR_READ_CMDID(cmd->header),
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(unsigned int)status);
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return -EIO;
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}
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return 0;
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}
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