mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-09-29 19:02:12 +00:00
61143f741e
Fix diacritics in some instances of my name and change my e-mail address to kabel@kernel.org. Add corresponding .mailmap entries. Signed-off-by: Marek Behún <kabel@kernel.org> Reviewed-by: Stefan Roese <sr@denx.de>
83 lines
2.2 KiB
C
83 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright (C) 2018 Marek Behún <kabel@kernel.org>
|
|
* Copyright (C) 2021 Pali Rohár <pali@kernel.org>
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <asm/arch/soc.h>
|
|
#include <asm/io.h>
|
|
#include <linux/bitops.h>
|
|
#include <linux/delay.h>
|
|
#include <mach/mbox.h>
|
|
|
|
#define RWTM_BASE (MVEBU_REGISTER(0xb0000))
|
|
#define RWTM_CMD_PARAM(i) (size_t)(RWTM_BASE + (i) * 4)
|
|
#define RWTM_CMD (RWTM_BASE + 0x40)
|
|
#define RWTM_CMD_RETSTATUS (RWTM_BASE + 0x80)
|
|
#define RWTM_CMD_STATUS(i) (size_t)(RWTM_BASE + 0x84 + (i) * 4)
|
|
#define MAX_ARGS 16
|
|
|
|
#define RWTM_HOST_INT_RESET (RWTM_BASE + 0xc8)
|
|
#define RWTM_HOST_INT_MASK (RWTM_BASE + 0xcc)
|
|
#define SP_CMD_COMPLETE BIT(0)
|
|
|
|
#define MBOX_STS_SUCCESS (0x0 << 30)
|
|
#define MBOX_STS_FAIL (0x1 << 30)
|
|
#define MBOX_STS_BADCMD (0x2 << 30)
|
|
#define MBOX_STS_LATER (0x3 << 30)
|
|
#define MBOX_STS_ERROR(s) ((s) & (3 << 30))
|
|
#define MBOX_STS_VALUE(s) (((s) >> 10) & 0xfffff)
|
|
#define MBOX_STS_CMD(s) ((s) & 0x3ff)
|
|
#define MBOX_STS_MARVELL_ERROR(s) ((s) == 0 ? 0 : \
|
|
(s) == 2 ? ETIMEDOUT : \
|
|
(s) == 3 ? EINVAL : \
|
|
(s) == 4 ? ENOSYS : \
|
|
EIO)
|
|
|
|
int mbox_do_cmd(enum mbox_cmd cmd, u32 *in, int nin, u32 *out, int nout)
|
|
{
|
|
const int tries = 50;
|
|
int i;
|
|
u32 status;
|
|
|
|
if (nin > MAX_ARGS || nout > MAX_ARGS)
|
|
return -EINVAL;
|
|
|
|
clrbits_le32(RWTM_HOST_INT_MASK, SP_CMD_COMPLETE);
|
|
|
|
for (i = 0; i < nin; i++)
|
|
writel(in[i], RWTM_CMD_PARAM(i));
|
|
for (; i < MAX_ARGS; i++)
|
|
writel(0x0, RWTM_CMD_PARAM(i));
|
|
writel(cmd, RWTM_CMD);
|
|
|
|
for (i = 0; i < tries; ++i) {
|
|
mdelay(10);
|
|
if (readl(RWTM_HOST_INT_RESET) & SP_CMD_COMPLETE)
|
|
break;
|
|
}
|
|
|
|
if (i == tries) {
|
|
/* if timed out, don't read status */
|
|
setbits_le32(RWTM_HOST_INT_RESET, SP_CMD_COMPLETE);
|
|
return -ETIMEDOUT;
|
|
}
|
|
|
|
for (i = 0; i < nout; ++i)
|
|
out[i] = readl(RWTM_CMD_STATUS(i));
|
|
status = readl(RWTM_CMD_RETSTATUS);
|
|
|
|
setbits_le32(RWTM_HOST_INT_RESET, SP_CMD_COMPLETE);
|
|
|
|
if (MBOX_STS_CMD(status) != cmd)
|
|
return -MBOX_STS_MARVELL_ERROR(status);
|
|
else if (MBOX_STS_ERROR(status) == MBOX_STS_FAIL)
|
|
return -(int)MBOX_STS_VALUE(status);
|
|
else if (MBOX_STS_ERROR(status) == MBOX_STS_BADCMD)
|
|
return -ENOSYS;
|
|
else if (MBOX_STS_ERROR(status) != MBOX_STS_SUCCESS)
|
|
return -EIO;
|
|
else
|
|
return MBOX_STS_VALUE(status);
|
|
}
|