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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+
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/*
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* Copyright (C) 2018 Marek Behún <kabel@kernel.org>
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* Copyright (C) 2021 Pali Rohár <pali@kernel.org>
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*/
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#include <common.h>
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#include <asm/arch/soc.h>
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#include <asm/io.h>
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#include <linux/bitops.h>
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#include <linux/delay.h>
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#include <mach/mbox.h>
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#define RWTM_BASE (MVEBU_REGISTER(0xb0000))
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#define RWTM_CMD_PARAM(i) (size_t)(RWTM_BASE + (i) * 4)
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#define RWTM_CMD (RWTM_BASE + 0x40)
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#define RWTM_CMD_RETSTATUS (RWTM_BASE + 0x80)
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#define RWTM_CMD_STATUS(i) (size_t)(RWTM_BASE + 0x84 + (i) * 4)
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#define MAX_ARGS 16
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#define RWTM_HOST_INT_RESET (RWTM_BASE + 0xc8)
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#define RWTM_HOST_INT_MASK (RWTM_BASE + 0xcc)
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#define SP_CMD_COMPLETE BIT(0)
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#define MBOX_STS_SUCCESS (0x0 << 30)
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#define MBOX_STS_FAIL (0x1 << 30)
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#define MBOX_STS_BADCMD (0x2 << 30)
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#define MBOX_STS_LATER (0x3 << 30)
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#define MBOX_STS_ERROR(s) ((s) & (3 << 30))
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#define MBOX_STS_VALUE(s) (((s) >> 10) & 0xfffff)
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#define MBOX_STS_CMD(s) ((s) & 0x3ff)
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#define MBOX_STS_MARVELL_ERROR(s) ((s) == 0 ? 0 : \
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(s) == 2 ? ETIMEDOUT : \
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(s) == 3 ? EINVAL : \
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(s) == 4 ? ENOSYS : \
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EIO)
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int mbox_do_cmd(enum mbox_cmd cmd, u32 *in, int nin, u32 *out, int nout)
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{
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const int tries = 50;
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int i;
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u32 status;
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if (nin > MAX_ARGS || nout > MAX_ARGS)
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return -EINVAL;
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clrbits_le32(RWTM_HOST_INT_MASK, SP_CMD_COMPLETE);
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for (i = 0; i < nin; i++)
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writel(in[i], RWTM_CMD_PARAM(i));
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for (; i < MAX_ARGS; i++)
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writel(0x0, RWTM_CMD_PARAM(i));
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writel(cmd, RWTM_CMD);
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for (i = 0; i < tries; ++i) {
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mdelay(10);
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if (readl(RWTM_HOST_INT_RESET) & SP_CMD_COMPLETE)
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break;
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}
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if (i == tries) {
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/* if timed out, don't read status */
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setbits_le32(RWTM_HOST_INT_RESET, SP_CMD_COMPLETE);
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return -ETIMEDOUT;
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}
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for (i = 0; i < nout; ++i)
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out[i] = readl(RWTM_CMD_STATUS(i));
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status = readl(RWTM_CMD_RETSTATUS);
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setbits_le32(RWTM_HOST_INT_RESET, SP_CMD_COMPLETE);
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if (MBOX_STS_CMD(status) != cmd)
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return -MBOX_STS_MARVELL_ERROR(status);
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else if (MBOX_STS_ERROR(status) == MBOX_STS_FAIL)
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return -(int)MBOX_STS_VALUE(status);
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else if (MBOX_STS_ERROR(status) == MBOX_STS_BADCMD)
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return -ENOSYS;
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else if (MBOX_STS_ERROR(status) != MBOX_STS_SUCCESS)
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return -EIO;
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else
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return MBOX_STS_VALUE(status);
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}
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