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author | J. German Rivera <German.Rivera@freescale.com> | 2015-01-06 13:19:02 -0800 |
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committer | York Sun <yorksun@freescale.com> | 2015-02-24 13:10:20 -0800 |
commit | 7b3bd9a7988a8b4c8ba22a52b4927e8e59819b12 (patch) | |
tree | 665c5303c5e8d4357d0bd4b2cc7b5f97e56b8291 /drivers/net/fsl-mc/mc_sys.c | |
parent | 4f2532c4a4a34f0241ef9bc921044772f19f928d (diff) | |
download | u-boot-imx-7b3bd9a7988a8b4c8ba22a52b4927e8e59819b12.zip u-boot-imx-7b3bd9a7988a8b4c8ba22a52b4927e8e59819b12.tar.gz u-boot-imx-7b3bd9a7988a8b4c8ba22a52b4927e8e59819b12.tar.bz2 |
drivers/mc: Migrated MC Flibs to 0.5.2
Upgrade Manage Complex (MC) flib API to 0.5.2. Rename directory
fsl_mc to fsl-mc. Change the fsl-mc node in Linux device tree
from "fsl,dprcr" to "fsl-mc". Print MC version info when
appropriate.
Signed-off-by: J. German Rivera <German.Rivera@freescale.com>
Signed-off-by: Lijun Pan <Lijun.Pan@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
Diffstat (limited to 'drivers/net/fsl-mc/mc_sys.c')
-rw-r--r-- | drivers/net/fsl-mc/mc_sys.c | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/drivers/net/fsl-mc/mc_sys.c b/drivers/net/fsl-mc/mc_sys.c new file mode 100644 index 0000000..7c8e003 --- /dev/null +++ b/drivers/net/fsl-mc/mc_sys.c @@ -0,0 +1,63 @@ +/* + * Freescale Layerscape MC I/O wrapper + * + * Copyright (C) 2014 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 = 2000; + + 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_AUTHID(cmd->header), + (unsigned int)MC_CMD_HDR_READ_CMDID(cmd->header), + (unsigned int)status); + + return -EIO; + } + + return 0; +} |