blob: 9a1dc2c0c83175f80b0ba06be063a5a3d9109bde [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2018 Intel Corporation <www.intel.com>
*/
#include <common.h>
#include <altera.h>
#include <log.h>
#include <watchdog.h>
#include <asm/arch/mailbox_s10.h>
#include <linux/delay.h>
#define RECONFIG_STATUS_POLL_RESP_TIMEOUT_MS 60000
#define RECONFIG_STATUS_INTERVAL_DELAY_US 1000000
static const struct mbox_cfgstat_state {
int err_no;
const char *error_name;
} mbox_cfgstat_state[] = {
{MBOX_CFGSTAT_STATE_IDLE, "FPGA in idle mode."},
{MBOX_CFGSTAT_STATE_CONFIG, "FPGA in config mode."},
{MBOX_CFGSTAT_STATE_FAILACK, "Acknowledgment failed!"},
{MBOX_CFGSTAT_STATE_ERROR_INVALID, "Invalid bitstream!"},
{MBOX_CFGSTAT_STATE_ERROR_CORRUPT, "Corrupted bitstream!"},
{MBOX_CFGSTAT_STATE_ERROR_AUTH, "Authentication failed!"},
{MBOX_CFGSTAT_STATE_ERROR_CORE_IO, "I/O error!"},
{MBOX_CFGSTAT_STATE_ERROR_HARDWARE, "Hardware error!"},
{MBOX_CFGSTAT_STATE_ERROR_FAKE, "Fake error!"},
{MBOX_CFGSTAT_STATE_ERROR_BOOT_INFO, "Error in boot info!"},
{MBOX_CFGSTAT_STATE_ERROR_QSPI_ERROR, "Error in QSPI!"},
{MBOX_RESP_ERROR, "Mailbox general error!"},
{-ETIMEDOUT, "I/O timeout error"},
{-1, "Unknown error!"}
};
#define MBOX_CFGSTAT_MAX ARRAY_SIZE(mbox_cfgstat_state)
static const char *mbox_cfgstat_to_str(int err)
{
int i;
for (i = 0; i < MBOX_CFGSTAT_MAX - 1; i++) {
if (mbox_cfgstat_state[i].err_no == err)
return mbox_cfgstat_state[i].error_name;
}
return mbox_cfgstat_state[MBOX_CFGSTAT_MAX - 1].error_name;
}
/*
* Add the ongoing transaction's command ID into pending list and return
* the command ID for next transfer.
*/
static u8 add_transfer(u32 *xfer_pending_list, size_t list_size, u8 id)
{
int i;
for (i = 0; i < list_size; i++) {
if (xfer_pending_list[i])
continue;
xfer_pending_list[i] = id;
debug("ID(%d) added to transaction pending list\n", id);
/*
* Increment command ID for next transaction.
* Valid command ID (4 bits) is from 1 to 15.
*/
id = (id % 15) + 1;
break;
}
return id;
}
/*
* Check whether response ID match the command ID in the transfer
* pending list. If a match is found in the transfer pending list,
* it clears the transfer pending list and return the matched
* command ID.
*/
static int get_and_clr_transfer(u32 *xfer_pending_list, size_t list_size,
u8 id)
{
int i;
for (i = 0; i < list_size; i++) {
if (id != xfer_pending_list[i])
continue;
xfer_pending_list[i] = 0;
return id;
}
return 0;
}
/*
* Polling the FPGA configuration status.
* Return 0 for success, non-zero for error.
*/
static int reconfig_status_polling_resp(void)
{
int ret;
unsigned long start = get_timer(0);
while (1) {
ret = mbox_get_fpga_config_status(MBOX_RECONFIG_STATUS);
if (!ret)
return 0; /* configuration success */
if (ret != MBOX_CFGSTAT_STATE_CONFIG)
return ret;
if (get_timer(start) > RECONFIG_STATUS_POLL_RESP_TIMEOUT_MS)
break; /* time out */
puts(".");
udelay(RECONFIG_STATUS_INTERVAL_DELAY_US);
WATCHDOG_RESET();
}
return -ETIMEDOUT;
}
static u32 get_resp_hdr(u32 *r_index, u32 *w_index, u32 *resp_count,
u32 *resp_buf, u32 buf_size, u32 client_id)
{
u32 buf[MBOX_RESP_BUFFER_SIZE];
u32 mbox_hdr;
u32 resp_len;
u32 hdr_len;
u32 i;
if (*resp_count < buf_size) {
u32 rcv_len_max = buf_size - *resp_count;
if (rcv_len_max > MBOX_RESP_BUFFER_SIZE)
rcv_len_max = MBOX_RESP_BUFFER_SIZE;
resp_len = mbox_rcv_resp(buf, rcv_len_max);
for (i = 0; i < resp_len; i++) {
resp_buf[(*w_index)++] = buf[i];
*w_index %= buf_size;
(*resp_count)++;
}
}
/* No response in buffer */
if (*resp_count == 0)
return 0;
mbox_hdr = resp_buf[*r_index];
hdr_len = MBOX_RESP_LEN_GET(mbox_hdr);
/* Insufficient header length to return a mailbox header */
if ((*resp_count - 1) < hdr_len)
return 0;
*r_index += (hdr_len + 1);
*r_index %= buf_size;
*resp_count -= (hdr_len + 1);
/* Make sure response belongs to us */
if (MBOX_RESP_CLIENT_GET(mbox_hdr) != client_id)
return 0;
return mbox_hdr;
}
/* Send bit stream data to SDM via RECONFIG_DATA mailbox command */
static int send_reconfig_data(const void *rbf_data, size_t rbf_size,
u32 xfer_max, u32 buf_size_max)
{
u32 response_buffer[MBOX_RESP_BUFFER_SIZE];
u32 xfer_pending[MBOX_RESP_BUFFER_SIZE];
u32 resp_rindex = 0;
u32 resp_windex = 0;
u32 resp_count = 0;
u32 xfer_count = 0;
int resp_err = 0;
u8 cmd_id = 1;
u32 args[3];
int ret;
debug("SDM xfer_max = %d\n", xfer_max);
debug("SDM buf_size_max = %x\n\n", buf_size_max);
memset(xfer_pending, 0, sizeof(xfer_pending));
while (rbf_size || xfer_count) {
if (!resp_err && rbf_size && xfer_count < xfer_max) {
args[0] = MBOX_ARG_DESC_COUNT(1);
args[1] = (u64)rbf_data;
if (rbf_size >= buf_size_max) {
args[2] = buf_size_max;
rbf_size -= buf_size_max;
rbf_data += buf_size_max;
} else {
args[2] = (u64)rbf_size;
rbf_size = 0;
}
resp_err = mbox_send_cmd_only(cmd_id, MBOX_RECONFIG_DATA,
MBOX_CMD_INDIRECT, 3, args);
if (!resp_err) {
xfer_count++;
cmd_id = add_transfer(xfer_pending,
MBOX_RESP_BUFFER_SIZE,
cmd_id);
}
puts(".");
} else {
u32 resp_hdr = get_resp_hdr(&resp_rindex, &resp_windex,
&resp_count,
response_buffer,
MBOX_RESP_BUFFER_SIZE,
MBOX_CLIENT_ID_UBOOT);
/*
* If no valid response header found or
* non-zero length from RECONFIG_DATA
*/
if (!resp_hdr || MBOX_RESP_LEN_GET(resp_hdr))
continue;
/* Check for response's status */
if (!resp_err) {
resp_err = MBOX_RESP_ERR_GET(resp_hdr);
debug("Response error code: %08x\n", resp_err);
}
ret = get_and_clr_transfer(xfer_pending,
MBOX_RESP_BUFFER_SIZE,
MBOX_RESP_ID_GET(resp_hdr));
if (ret) {
/* Claim and reuse the ID */
cmd_id = (u8)ret;
xfer_count--;
}
if (resp_err && !xfer_count)
return resp_err;
}
WATCHDOG_RESET();
}
return 0;
}
/*
* This is the interface used by FPGA driver.
* Return 0 for success, non-zero for error.
*/
int intel_sdm_mb_load(Altera_desc *desc, const void *rbf_data, size_t rbf_size)
{
int ret;
u32 resp_len = 2;
u32 resp_buf[2];
debug("Sending MBOX_RECONFIG...\n");
ret = mbox_send_cmd(MBOX_ID_UBOOT, MBOX_RECONFIG, MBOX_CMD_DIRECT, 0,
NULL, 0, &resp_len, resp_buf);
if (ret) {
puts("Failure in RECONFIG mailbox command!\n");
return ret;
}
ret = send_reconfig_data(rbf_data, rbf_size, resp_buf[0], resp_buf[1]);
if (ret) {
printf("RECONFIG_DATA error: %08x, %s\n", ret,
mbox_cfgstat_to_str(ret));
return ret;
}
/* Make sure we don't send MBOX_RECONFIG_STATUS too fast */
udelay(RECONFIG_STATUS_INTERVAL_DELAY_US);
debug("Polling with MBOX_RECONFIG_STATUS...\n");
ret = reconfig_status_polling_resp();
if (ret) {
printf("RECONFIG_STATUS Error: %08x, %s\n", ret,
mbox_cfgstat_to_str(ret));
return ret;
}
puts("FPGA reconfiguration OK!\n");
return ret;
}