u-boot/drivers/net/fsl-mc/mc_sys.c
Prabhakar Kushwaha a2a55e518f driver/fsl-mc: Add support of MC Flibs
Freescale's Layerscape Management Complex (MC) provide support various
objects like DPRC, DPNI, DPBP and DPIO.
Where:
	DPRC: Place holdes for other MC objectes like DPNI, DPBP, DPIO
	DPBP: Management of buffer pool
	DPIO: Used for used to QBMan portal
	DPNI: Represents standard network interface

These objects are used for DPAA ethernet drivers.

Signed-off-by: J. German Rivera <German.Rivera@freescale.com>
Signed-off-by: Lijun Pan <Lijun.Pan@freescale.com>
Signed-off-by: Stuart Yoder <stuart.yoder@freescale.com>
Signed-off-by: Geoff Thorpe <Geoff.Thorpe@freescale.com>
Signed-off-by: Haiying Wang <Haiying.Wang@freescale.com>
Signed-off-by: Cristian Sovaiala <cristian.sovaiala@freescale.com>
Signed-off-by: pankaj chauhan <pankaj.chauhan@freescale.com>
Signed-off-by: Prabhakar Kushwaha <prabhakar@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
2015-04-21 10:27:35 -07:00

63 lines
1.7 KiB
C

/*
* Freescale Layerscape MC I/O wrapper
*
* Copyright (C) 2013-2015 Freescale Semiconductor, Inc.
* Author: German Rivera <German.Rivera@freescale.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#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)u64_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 = 6000;
mc_write_command(mc_io->mmio_regs, cmd);
for ( ; ; ) {
status = mc_read_response(mc_io->mmio_regs, cmd);
if (status != MC_CMD_STATUS_READY)
break;
if (--timeout == 0) {
printf("Error: Timeout waiting for MC response\n");
return -ETIMEDOUT;
}
udelay(500);
}
if (status != MC_CMD_STATUS_OK) {
printf("Error: MC command failed (portal: %p, obj handle: %#x, command: %#x, status: %#x)\n",
mc_io->mmio_regs,
(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;
}