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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2018 Marek Behun <marek.behun@nic.cz>
*/
#include <common.h>
#include <asm/arch/soc.h>
#include <asm/io.h>
#include <linux/delay.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 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)
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
};
static 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);
}
const char *mox_sp_get_ecdsa_public_key(void)
{
static char public_key[135];
u32 out[16];
int res;
if (public_key[0])
return public_key;
res = mbox_do_cmd(MBOX_CMD_ECDSA_PUB_KEY, out, 16);
if (res < 0)
return NULL;
sprintf(public_key,
"%06x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x",
(u32)res, out[0], out[1], out[2], out[3], out[4], out[5],
out[6], out[7], out[8], out[9], out[10], out[11], out[12],
out[13], out[14], out[15]);
return public_key;
}
static inline void res_to_mac(u8 *mac, u32 t1, u32 t2)
{
mac[0] = t1 >> 8;
mac[1] = t1;
mac[2] = t2 >> 24;
mac[3] = t2 >> 16;
mac[4] = t2 >> 8;
mac[5] = t2;
}
int mbox_sp_get_board_info(u64 *sn, u8 *mac1, u8 *mac2, int *bv, int *ram)
{
u32 out[8];
int res;
res = mbox_do_cmd(MBOX_CMD_BOARD_INFO, out, 8);
if (res < 0)
return res;
if (sn) {
*sn = out[1];
*sn <<= 32;
*sn |= out[0];
}
if (bv)
*bv = out[2];
if (ram)
*ram = out[3];
if (mac1)
res_to_mac(mac1, out[4], out[5]);
if (mac2)
res_to_mac(mac2, out[6], out[7]);
return 0;
}
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