diff options
Diffstat (limited to 'sys/contrib/dev/mediatek/mt76/mt7921/sdio_mcu.c')
-rw-r--r-- | sys/contrib/dev/mediatek/mt76/mt7921/sdio_mcu.c | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/sys/contrib/dev/mediatek/mt76/mt7921/sdio_mcu.c b/sys/contrib/dev/mediatek/mt76/mt7921/sdio_mcu.c new file mode 100644 index 000000000000..5c1489766d9f --- /dev/null +++ b/sys/contrib/dev/mediatek/mt76/mt7921/sdio_mcu.c @@ -0,0 +1,175 @@ +// 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 "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; +} |