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// SPDX-License-Identifier: ISC
/* Copyright (C) 2021 MediaTek Inc. */
#include <linux/kernel.h>
#include <linux/mmc/sdio_func.h>
#include <linux/module.h>
#include <linux/iopoll.h>
#include "mt7921.h"
#include "../sdio.h"
#include "../mt76_connac2_mac.h"
#include "mcu.h"
#include "regs.h"
static int
mt7921s_mcu_send_message(struct mt76_dev *mdev, struct sk_buff *skb,
int cmd, int *seq)
{
struct mt7921_dev *dev = container_of(mdev, struct mt7921_dev, mt76);
enum mt7921_sdio_pkt_type type = MT7921_SDIO_CMD;
enum mt76_mcuq_id txq = MT_MCUQ_WM;
int ret, pad;
/* We just return in case firmware assertion to avoid blocking the
* common workqueue to run, for example, the coredump work might be
* blocked by mt7921_mac_work that is excuting register access via sdio
* bus.
*/
if (dev->fw_assert)
return -EBUSY;
ret = mt76_connac2_mcu_fill_message(mdev, skb, cmd, seq);
if (ret)
return ret;
mdev->mcu.timeout = 3 * HZ;
if (cmd == MCU_CMD(FW_SCATTER))
type = MT7921_SDIO_FWDL;
mt7921_skb_add_usb_sdio_hdr(dev, skb, type);
pad = round_up(skb->len, 4) - skb->len;
__skb_put_zero(skb, pad);
ret = mt76_tx_queue_skb_raw(dev, mdev->q_mcu[txq], skb, 0);
if (ret)
return ret;
mt76_queue_kick(dev, mdev->q_mcu[txq]);
return ret;
}
static u32 mt7921s_read_rm3r(struct mt7921_dev *dev)
{
struct mt76_sdio *sdio = &dev->mt76.sdio;
return sdio_readl(sdio->func, MCR_D2HRM3R, NULL);
}
static u32 mt7921s_clear_rm3r_drv_own(struct mt7921_dev *dev)
{
struct mt76_sdio *sdio = &dev->mt76.sdio;
u32 val;
val = sdio_readl(sdio->func, MCR_D2HRM3R, NULL);
if (val)
sdio_writel(sdio->func, H2D_SW_INT_CLEAR_MAILBOX_ACK,
MCR_WSICR, NULL);
return val;
}
int mt7921s_mcu_init(struct mt7921_dev *dev)
{
static const struct mt76_mcu_ops mt7921s_mcu_ops = {
.headroom = MT_SDIO_HDR_SIZE +
sizeof(struct mt76_connac2_mcu_txd),
.tailroom = MT_SDIO_TAIL_SIZE,
.mcu_skb_send_msg = mt7921s_mcu_send_message,
.mcu_parse_response = mt7921_mcu_parse_response,
.mcu_rr = mt76_connac_mcu_reg_rr,
.mcu_wr = mt76_connac_mcu_reg_wr,
};
int ret;
mt7921s_mcu_drv_pmctrl(dev);
dev->mt76.mcu_ops = &mt7921s_mcu_ops;
ret = mt7921_run_firmware(dev);
if (ret)
return ret;
set_bit(MT76_STATE_MCU_RUNNING, &dev->mphy.state);
return 0;
}
int mt7921s_mcu_drv_pmctrl(struct mt7921_dev *dev)
{
struct sdio_func *func = dev->mt76.sdio.func;
struct mt76_phy *mphy = &dev->mt76.phy;
struct mt76_connac_pm *pm = &dev->pm;
u32 status;
int err;
sdio_claim_host(func);
sdio_writel(func, WHLPCR_FW_OWN_REQ_CLR, MCR_WHLPCR, NULL);
err = readx_poll_timeout(mt76s_read_pcr, &dev->mt76, status,
status & WHLPCR_IS_DRIVER_OWN, 2000, 1000000);
if (!err && test_bit(MT76_STATE_MCU_RUNNING, &dev->mphy.state))
err = readx_poll_timeout(mt7921s_read_rm3r, dev, status,
status & D2HRM3R_IS_DRIVER_OWN,
2000, 1000000);
sdio_release_host(func);
if (err < 0) {
dev_err(dev->mt76.dev, "driver own failed\n");
return -EIO;
}
clear_bit(MT76_STATE_PM, &mphy->state);
pm->stats.last_wake_event = jiffies;
pm->stats.doze_time += pm->stats.last_wake_event -
pm->stats.last_doze_event;
return 0;
}
int mt7921s_mcu_fw_pmctrl(struct mt7921_dev *dev)
{
struct sdio_func *func = dev->mt76.sdio.func;
struct mt76_phy *mphy = &dev->mt76.phy;
struct mt76_connac_pm *pm = &dev->pm;
u32 status;
int err;
sdio_claim_host(func);
if (test_bit(MT76_STATE_MCU_RUNNING, &dev->mphy.state)) {
err = readx_poll_timeout(mt7921s_clear_rm3r_drv_own,
dev, status,
!(status & D2HRM3R_IS_DRIVER_OWN),
2000, 1000000);
if (err < 0) {
dev_err(dev->mt76.dev, "mailbox ACK not cleared\n");
goto out;
}
}
sdio_writel(func, WHLPCR_FW_OWN_REQ_SET, MCR_WHLPCR, NULL);
err = readx_poll_timeout(mt76s_read_pcr, &dev->mt76, status,
!(status & WHLPCR_IS_DRIVER_OWN), 2000, 1000000);
out:
sdio_release_host(func);
if (err < 0) {
dev_err(dev->mt76.dev, "firmware own failed\n");
clear_bit(MT76_STATE_PM, &mphy->state);
return -EIO;
}
pm->stats.last_doze_event = jiffies;
pm->stats.awake_time += pm->stats.last_doze_event -
pm->stats.last_wake_event;
return 0;
}
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