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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/bitops.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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