137 lines
2.8 KiB
C
137 lines
2.8 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2018 Marek Behun <marek.behun@nic.cz>
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*/
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#include <common.h>
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#include <asm/io.h>
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#define RWTM_CMD_PARAM(i) (size_t)(0xd00b0000 + (i) * 4)
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#define RWTM_CMD 0xd00b0040
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#define RWTM_CMD_RETSTATUS 0xd00b0080
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#define RWTM_CMD_STATUS(i) (size_t)(0xd00b0084 + (i) * 4)
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#define RWTM_HOST_INT_RESET 0xd00b00c8
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#define RWTM_HOST_INT_MASK 0xd00b00cc
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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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enum mbox_cmd {
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MBOX_CMD_GET_RANDOM = 1,
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MBOX_CMD_BOARD_INFO,
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MBOX_CMD_ECDSA_PUB_KEY,
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MBOX_CMD_HASH,
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MBOX_CMD_SIGN,
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MBOX_CMD_VERIFY,
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MBOX_CMD_OTP_READ,
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MBOX_CMD_OTP_WRITE
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};
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static int mbox_do_cmd(enum mbox_cmd cmd, 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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clrbits_le32(RWTM_HOST_INT_MASK, SP_CMD_COMPLETE);
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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 -EIO;
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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_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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const char *mox_sp_get_ecdsa_public_key(void)
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{
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static char public_key[135];
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u32 out[16];
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int res;
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if (public_key[0])
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return public_key;
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res = mbox_do_cmd(MBOX_CMD_ECDSA_PUB_KEY, out, 16);
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if (res < 0)
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return NULL;
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sprintf(public_key,
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"%06x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x",
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(u32)res, out[0], out[1], out[2], out[3], out[4], out[5],
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out[6], out[7], out[8], out[9], out[10], out[11], out[12],
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out[13], out[14], out[15]);
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return public_key;
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}
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static inline void res_to_mac(u8 *mac, u32 t1, u32 t2)
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{
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mac[0] = t1 >> 8;
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mac[1] = t1;
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mac[2] = t2 >> 24;
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mac[3] = t2 >> 16;
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mac[4] = t2 >> 8;
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mac[5] = t2;
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}
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int mbox_sp_get_board_info(u64 *sn, u8 *mac1, u8 *mac2, int *bv, int *ram)
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{
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u32 out[8];
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int res;
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res = mbox_do_cmd(MBOX_CMD_BOARD_INFO, out, 8);
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if (res < 0)
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return res;
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if (sn) {
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*sn = out[1];
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*sn <<= 32;
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*sn |= out[0];
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}
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if (bv)
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*bv = out[2];
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if (ram)
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*ram = out[3];
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if (mac1)
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res_to_mac(mac1, out[4], out[5]);
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if (mac2)
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res_to_mac(mac2, out[6], out[7]);
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return 0;
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}
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