/*
* Copyright (C) 2016 Felix Fietkau <nbd@nbd.name>
* Copyright (C) 2018 Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <linux/kernel.h>
#include <linux/firmware.h>
#include <linux/delay.h>
#include "mt76.h"
#include "mt76x02_mcu.h"
#include "mt76x02_dma.h"
struct sk_buff *mt76x02_mcu_msg_alloc(const void *data, int len)
{
struct sk_buff *skb;
skb = alloc_skb(len, GFP_KERNEL);
if (!skb)
return NULL;
memcpy(skb_put(skb, len), data, len);
return skb;
}
EXPORT_SYMBOL_GPL(mt76x02_mcu_msg_alloc);
static struct sk_buff *
mt76x02_mcu_get_response(struct mt76_dev *dev, unsigned long expires)
{
unsigned long timeout;
if (!time_is_after_jiffies(expires))
return NULL;
timeout = expires - jiffies;
wait_event_timeout(dev->mmio.mcu.wait,
!skb_queue_empty(&dev->mmio.mcu.res_q),
timeout);
return skb_dequeue(&dev->mmio.mcu.res_q);
}
static int
mt76x02_tx_queue_mcu(struct mt76_dev *dev, enum mt76_txq_id qid,
struct sk_buff *skb, int cmd, int seq)
{
struct mt76_queue *q = &dev->q_tx[qid];
struct mt76_queue_buf buf;
dma_addr_t addr;
u32 tx_info;
tx_info = MT_MCU_MSG_TYPE_CMD |
FIELD_PREP(MT_MCU_MSG_CMD_TYPE, cmd) |
FIELD_PREP(MT_MCU_MSG_CMD_SEQ, seq) |
FIELD_PREP(MT_MCU_MSG_PORT, CPU_TX_PORT) |
FIELD_PREP(MT_MCU_MSG_LEN, skb->len);
addr = dma_map_single(dev->dev, skb->data, skb->len,
DMA_TO_DEVICE);
if (dma_mapping_error(dev->dev, addr))
return -ENOMEM;
buf.addr = addr;
buf.len = skb->len;
spin_lock_bh(&q->lock);
dev->queue_ops->add_buf(dev, q, &buf, 1, tx_info, skb, NULL);
dev->queue_ops->kick(dev, q);
spin_unlock_bh(&q->lock);
return 0;
}
int mt76x02_mcu_msg_send(struct mt76_dev *dev, struct sk_buff *skb,
int cmd, bool wait_resp)
{
unsigned long expires = jiffies + HZ;
int ret;
u8 seq;
if (!skb)
return -EINVAL;
mutex_lock(&dev->mmio.mcu.mutex);
seq = ++dev->mmio.mcu.msg_seq & 0xf;
if (!seq)
seq = ++dev->mmio.mcu.msg_seq & 0xf;
ret = mt76x02_tx_queue_mcu(dev, MT_TXQ_MCU, skb, cmd, seq);
if (ret)
goto out;
while (wait_resp) {
u32 *rxfce;
bool check_seq = false;
skb = mt76x02_mcu_get_response(dev, expires);
if (!skb) {
dev_err(dev->dev,
"MCU message %d (seq %d) timed out\n", cmd,
seq);
ret = -ETIMEDOUT;
break;
}
rxfce = (u32 *) skb->cb;
if (seq == FIELD_GET(MT_RX_FCE_INFO_CMD_SEQ, *rxfce))
check_seq = true;
dev_kfree_skb(skb);
if (check_seq)
break;
}
out:
mutex_unlock(&dev->mmio.mcu.mutex);
return ret;
}
EXPORT_SYMBOL_GPL(mt76x02_mcu_msg_send);
int mt76x02_mcu_function_select(struct mt76_dev *dev,
enum mcu_function func,
u32 val, bool wait_resp)
{
struct sk_buff *skb;
struct {
__le32 id;
__le32 value;
} __packed __aligned(4) msg = {
.id = cpu_to_le32(func),
.value = cpu_to_le32(val),
};
skb = dev->mcu_ops->mcu_msg_alloc(&msg, sizeof(msg));
return dev->mcu_ops->mcu_send_msg(dev, skb, CMD_FUN_SET_OP,
wait_resp);
}
EXPORT_SYMBOL_GPL(mt76x02_mcu_function_select);
int mt76x02_mcu_set_radio_state(struct mt76_dev *dev, bool on,
bool wait_resp)
{
struct sk_buff *skb;
struct {
__le32 mode;
__le32 level;
} __packed __aligned(4) msg = {
.mode = cpu_to_le32(on ? RADIO_ON : RADIO_OFF),
.level = cpu_to_le32(0),
};
skb = dev->mcu_ops->mcu_msg_alloc(&msg, sizeof(msg));
return dev->mcu_ops->mcu_send_msg(dev, skb, CMD_POWER_SAVING_OP,
wait_resp);
}
EXPORT_SYMBOL_GPL(mt76x02_mcu_set_radio_state);
int mt76x02_mcu_cleanup(struct mt76_dev *dev)
{
struct sk_buff *skb;
dev->bus->wr(dev, MT_MCU_INT_LEVEL, 1);
usleep_range(20000, 30000);
while ((skb = skb_dequeue(&dev->mmio.mcu.res_q)) != NULL)
dev_kfree_skb(skb);
return 0;
}
EXPORT_SYMBOL_GPL(mt76x02_mcu_cleanup);
