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d678a59d2d
When bringing in the series 'arm: dts: am62-beagleplay: Fix Beagleplay Ethernet"' I failed to notice that b4 noticed it was based on next and so took that as the base commit and merged that part of next to master. This reverts commitc8ffd1356d, reversing changes made to2ee6f3a5f7. Reported-by: Jonas Karlman <jonas@kwiboo.se> Signed-off-by: Tom Rini <trini@konsulko.com>
69 lines
1.7 KiB
C
69 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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#include <linux/delay.h>
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static u16 mc_cmd_hdr_read_cmdid(struct mc_command *cmd)
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{
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struct mc_cmd_header *hdr = (struct mc_cmd_header *)&cmd->header;
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u16 cmd_id = le16_to_cpu(hdr->cmd_id);
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return cmd_id;
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}
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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),
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(unsigned int)mc_cmd_hdr_read_cmdid(cmd),
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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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