From 46ce9c78a99814639763d8ea9ac1bf7354b6ea8d Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Pali=20Roh=C3=A1r?= Date: Wed, 23 Feb 2022 14:15:47 +0100 Subject: arm: mvebu: a37xx: Move generic mbox code to arch/arm/mach-mvebu MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Generic A3720 mbox code is currently in Turris Mox specific board file board/CZ.NIC/turris_mox/mox_sp.c. Move it to board independent arch file arch/arm/mach-mvebu/armada3700/mbox.c. Signed-off-by: Pali Rohár Reviewed-by: Marek Behún Reviewed-by: Stefan Roese --- arch/arm/mach-mvebu/armada3700/Makefile | 2 +- arch/arm/mach-mvebu/armada3700/mbox.c | 67 +++++++++++++++++++++++++++++++++ arch/arm/mach-mvebu/include/mach/mbox.h | 23 +++++++++++ 3 files changed, 91 insertions(+), 1 deletion(-) create mode 100644 arch/arm/mach-mvebu/armada3700/mbox.c create mode 100644 arch/arm/mach-mvebu/include/mach/mbox.h (limited to 'arch') diff --git a/arch/arm/mach-mvebu/armada3700/Makefile b/arch/arm/mach-mvebu/armada3700/Makefile index cd74726cc7..98350a41e0 100644 --- a/arch/arm/mach-mvebu/armada3700/Makefile +++ b/arch/arm/mach-mvebu/armada3700/Makefile @@ -2,5 +2,5 @@ # # Copyright (C) 2016 Stefan Roese -obj-y = cpu.o +obj-y = cpu.o mbox.o obj-$(CONFIG_MVEBU_EFUSE) += efuse.o diff --git a/arch/arm/mach-mvebu/armada3700/mbox.c b/arch/arm/mach-mvebu/armada3700/mbox.c new file mode 100644 index 0000000000..cb86b967c2 --- /dev/null +++ b/arch/arm/mach-mvebu/armada3700/mbox.c @@ -0,0 +1,67 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2018 Marek Behun + */ + +#include +#include +#include +#include +#include +#include + +#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 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) + +int mbox_do_cmd(enum mbox_cmd cmd, u32 *out, int nout) +{ + const int tries = 50; + int i; + u32 status; + + clrbits_le32(RWTM_HOST_INT_MASK, SP_CMD_COMPLETE); + + 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 -EIO; + else if (MBOX_STS_ERROR(status) == MBOX_STS_FAIL) + return -(int)MBOX_STS_VALUE(status); + else if (MBOX_STS_ERROR(status) != MBOX_STS_SUCCESS) + return -EIO; + else + return MBOX_STS_VALUE(status); +} diff --git a/arch/arm/mach-mvebu/include/mach/mbox.h b/arch/arm/mach-mvebu/include/mach/mbox.h new file mode 100644 index 0000000000..9812049358 --- /dev/null +++ b/arch/arm/mach-mvebu/include/mach/mbox.h @@ -0,0 +1,23 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright (C) 2018 Marek Behun + */ + +#ifndef _MVEBU_MBOX_H +#define _MVEBU_MBOX_H + +enum mbox_cmd { + MBOX_CMD_GET_RANDOM = 1, + MBOX_CMD_BOARD_INFO, + MBOX_CMD_ECDSA_PUB_KEY, + MBOX_CMD_HASH, + MBOX_CMD_SIGN, + MBOX_CMD_VERIFY, + + MBOX_CMD_OTP_READ, + MBOX_CMD_OTP_WRITE, +}; + +int mbox_do_cmd(enum mbox_cmd cmd, u32 *in, int nout); + +#endif -- cgit v1.2.3