319 lines
7.2 KiB
C
319 lines
7.2 KiB
C
/*
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* Copyright (c) 2019, Intel Corporation. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <lib/mmio.h>
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#include <common/debug.h>
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#include <drivers/delay_timer.h>
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#include "socfpga_mailbox.h"
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#include "socfpga_sip_svc.h"
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static int fill_mailbox_circular_buffer(uint32_t header_cmd, uint32_t *args,
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int len)
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{
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uint32_t cmd_free_offset;
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int i;
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cmd_free_offset = mmio_read_32(MBOX_OFFSET + MBOX_CIN);
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mmio_write_32(MBOX_OFFSET + MBOX_CMD_BUFFER + (cmd_free_offset++ * 4),
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header_cmd);
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for (i = 0; i < len; i++) {
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cmd_free_offset %= MBOX_CMD_BUFFER_SIZE;
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mmio_write_32(MBOX_OFFSET + MBOX_CMD_BUFFER +
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(cmd_free_offset++ * 4), args[i]);
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}
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cmd_free_offset %= MBOX_CMD_BUFFER_SIZE;
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mmio_write_32(MBOX_OFFSET + MBOX_CIN, cmd_free_offset);
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return 0;
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}
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int mailbox_read_response(int job_id, uint32_t *response, int resp_len)
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{
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int rin = 0;
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int rout = 0;
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int response_length = 0;
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int resp = 0;
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int total_resp_len = 0;
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if (mmio_read_32(MBOX_OFFSET + MBOX_DOORBELL_FROM_SDM))
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mmio_write_32(MBOX_OFFSET + MBOX_DOORBELL_FROM_SDM, 0);
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rin = mmio_read_32(MBOX_OFFSET + MBOX_RIN);
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rout = mmio_read_32(MBOX_OFFSET + MBOX_ROUT);
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if (rout != rin) {
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resp = mmio_read_32(MBOX_OFFSET +
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MBOX_RESP_BUFFER + ((rout++)*4));
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rout %= MBOX_RESP_BUFFER_SIZE;
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mmio_write_32(MBOX_OFFSET + MBOX_ROUT, rout);
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if (MBOX_RESP_CLIENT_ID(resp) != MBOX_ATF_CLIENT_ID ||
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MBOX_RESP_JOB_ID(resp) != job_id) {
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return MBOX_WRONG_ID;
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}
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if (MBOX_RESP_ERR(resp) > 0) {
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INFO("Error in response: %x\n", resp);
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return -resp;
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}
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response_length = MBOX_RESP_LEN(resp);
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while (response_length) {
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response_length--;
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resp = mmio_read_32(MBOX_OFFSET +
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MBOX_RESP_BUFFER +
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(rout)*4);
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if (response && resp_len) {
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*(response + total_resp_len) = resp;
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resp_len--;
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total_resp_len++;
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}
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rout++;
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rout %= MBOX_RESP_BUFFER_SIZE;
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mmio_write_32(MBOX_OFFSET + MBOX_ROUT, rout);
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}
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return total_resp_len;
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}
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return MBOX_NO_RESPONSE;
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}
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int mailbox_poll_response(int job_id, int urgent, uint32_t *response,
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int resp_len)
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{
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int timeout = 0xFFFFFF;
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int rin = 0;
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int rout = 0;
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int response_length = 0;
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int resp = 0;
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int total_resp_len = 0;
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while (1) {
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while (timeout > 0 &&
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!(mmio_read_32(MBOX_OFFSET +
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MBOX_DOORBELL_FROM_SDM) & 1)) {
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timeout--;
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}
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if (!timeout) {
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INFO("Timed out waiting for SDM");
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return MBOX_TIMEOUT;
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}
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mmio_write_32(MBOX_OFFSET + MBOX_DOORBELL_FROM_SDM, 0);
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if (urgent & 1) {
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mdelay(5);
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if ((mmio_read_32(MBOX_OFFSET + MBOX_STATUS) &
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MBOX_STATUS_UA_MASK) ^
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(urgent & MBOX_STATUS_UA_MASK)) {
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mmio_write_32(MBOX_OFFSET + MBOX_URG, 0);
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return 0;
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}
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mmio_write_32(MBOX_OFFSET + MBOX_URG, 0);
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INFO("Error: Mailbox did not get UA");
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return -1;
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}
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rin = mmio_read_32(MBOX_OFFSET + MBOX_RIN);
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rout = mmio_read_32(MBOX_OFFSET + MBOX_ROUT);
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while (rout != rin) {
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resp = mmio_read_32(MBOX_OFFSET +
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MBOX_RESP_BUFFER + ((rout++)*4));
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rout %= MBOX_RESP_BUFFER_SIZE;
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mmio_write_32(MBOX_OFFSET + MBOX_ROUT, rout);
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if (MBOX_RESP_CLIENT_ID(resp) != MBOX_ATF_CLIENT_ID ||
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MBOX_RESP_JOB_ID(resp) != job_id)
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continue;
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if (MBOX_RESP_ERR(resp) > 0) {
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INFO("Error in response: %x\n", resp);
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return -MBOX_RESP_ERR(resp);
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}
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response_length = MBOX_RESP_LEN(resp);
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while (response_length) {
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response_length--;
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resp = mmio_read_32(MBOX_OFFSET +
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MBOX_RESP_BUFFER +
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(rout)*4);
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if (response && resp_len) {
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*(response + total_resp_len) = resp;
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resp_len--;
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total_resp_len++;
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}
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rout++;
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rout %= MBOX_RESP_BUFFER_SIZE;
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mmio_write_32(MBOX_OFFSET + MBOX_ROUT, rout);
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}
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return total_resp_len;
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}
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}
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}
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int mailbox_send_cmd_async(int job_id, unsigned int cmd, uint32_t *args,
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int len, int urgent)
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{
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if (urgent)
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mmio_write_32(MBOX_OFFSET + MBOX_URG, 1);
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fill_mailbox_circular_buffer(MBOX_CLIENT_ID_CMD(MBOX_ATF_CLIENT_ID) |
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MBOX_JOB_ID_CMD(job_id) |
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MBOX_CMD_LEN_CMD(len) |
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MBOX_INDIRECT |
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cmd, args, len);
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mmio_write_32(MBOX_OFFSET + MBOX_DOORBELL_TO_SDM, 1);
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return 0;
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}
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int mailbox_send_cmd(int job_id, unsigned int cmd, uint32_t *args,
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int len, int urgent, uint32_t *response, int resp_len)
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{
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int status = 0;
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if (urgent) {
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urgent |= mmio_read_32(MBOX_OFFSET + MBOX_STATUS) &
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MBOX_STATUS_UA_MASK;
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mmio_write_32(MBOX_OFFSET + MBOX_URG, cmd);
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}
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else {
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status = fill_mailbox_circular_buffer(
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MBOX_CLIENT_ID_CMD(MBOX_ATF_CLIENT_ID) |
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MBOX_JOB_ID_CMD(job_id) |
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MBOX_CMD_LEN_CMD(len) |
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cmd, args, len);
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}
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if (status)
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return status;
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mmio_write_32(MBOX_OFFSET + MBOX_DOORBELL_TO_SDM, 1);
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status = mailbox_poll_response(job_id, urgent, response, resp_len);
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return status;
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}
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void mailbox_clear_response(void)
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{
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mmio_write_32(MBOX_OFFSET + MBOX_ROUT,
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mmio_read_32(MBOX_OFFSET + MBOX_RIN));
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}
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void mailbox_set_int(int interrupt)
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{
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mmio_write_32(MBOX_OFFSET+MBOX_INT, MBOX_COE_BIT(interrupt) |
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MBOX_UAE_BIT(interrupt));
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}
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void mailbox_set_qspi_open(void)
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{
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mailbox_set_int(MBOX_INT_FLAG_COE | MBOX_INT_FLAG_RIE);
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mailbox_send_cmd(MBOX_JOB_ID, MBOX_CMD_QSPI_OPEN, 0, 0, 0, NULL, 0);
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}
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void mailbox_set_qspi_direct(void)
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{
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mailbox_send_cmd(MBOX_JOB_ID, MBOX_CMD_QSPI_DIRECT, 0, 0, 0, NULL, 0);
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}
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void mailbox_set_qspi_close(void)
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{
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mailbox_set_int(MBOX_INT_FLAG_COE | MBOX_INT_FLAG_RIE);
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mailbox_send_cmd(MBOX_JOB_ID, MBOX_CMD_QSPI_CLOSE, 0, 0, 0, NULL, 0);
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}
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int mailbox_get_qspi_clock(void)
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{
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mailbox_set_int(MBOX_INT_FLAG_COE | MBOX_INT_FLAG_RIE);
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return mailbox_send_cmd(MBOX_JOB_ID, MBOX_CMD_QSPI_DIRECT, 0, 0, 0,
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NULL, 0);
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}
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void mailbox_qspi_set_cs(int device_select)
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{
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uint32_t cs_setting = device_select;
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/* QSPI device select settings at 31:28 */
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cs_setting = (cs_setting << 28);
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mailbox_set_int(MBOX_INT_FLAG_COE | MBOX_INT_FLAG_RIE);
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mailbox_send_cmd(MBOX_JOB_ID, MBOX_CMD_QSPI_SET_CS, &cs_setting,
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1, 0, NULL, 0);
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}
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void mailbox_reset_cold(void)
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{
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mailbox_set_int(MBOX_INT_FLAG_COE | MBOX_INT_FLAG_RIE);
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mailbox_send_cmd(MBOX_JOB_ID, MBOX_CMD_REBOOT_HPS, 0, 0, 0, NULL, 0);
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}
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int mailbox_init(void)
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{
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int status = 0;
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mailbox_set_int(MBOX_INT_FLAG_COE | MBOX_INT_FLAG_RIE |
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MBOX_INT_FLAG_UAE);
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mmio_write_32(MBOX_OFFSET + MBOX_URG, 0);
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mmio_write_32(MBOX_OFFSET + MBOX_DOORBELL_FROM_SDM, 0);
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status = mailbox_send_cmd(0, MBOX_CMD_RESTART, 0, 0, 1, NULL, 0);
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if (status)
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return status;
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mailbox_set_int(MBOX_INT_FLAG_COE | MBOX_INT_FLAG_RIE |
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MBOX_INT_FLAG_UAE);
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return 0;
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}
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uint32_t intel_mailbox_get_config_status(uint32_t cmd)
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{
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uint32_t status, res;
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uint32_t response[6];
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status = mailbox_send_cmd(1, cmd, NULL, 0, 0, response,
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sizeof(response) / sizeof(response[0]));
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if (status < 0)
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return status;
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res = response[RECONFIG_STATUS_STATE];
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if (res && res != MBOX_CFGSTAT_STATE_CONFIG)
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return res;
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res = response[RECONFIG_STATUS_PIN_STATUS];
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if (!(res & PIN_STATUS_NSTATUS))
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return MBOX_CFGSTAT_STATE_ERROR_HARDWARE;
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res = response[RECONFIG_STATUS_SOFTFUNC_STATUS];
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if (res & SOFTFUNC_STATUS_SEU_ERROR)
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return MBOX_CFGSTAT_STATE_ERROR_HARDWARE;
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if ((res & SOFTFUNC_STATUS_CONF_DONE) &&
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(res & SOFTFUNC_STATUS_INIT_DONE))
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return 0;
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return MBOX_CFGSTAT_STATE_CONFIG;
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}
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