developer | b11a539 | 2022-03-31 00:34:47 +0800 | [diff] [blame] | 1 | // SPDX-License-Identifier: ISC |
| 2 | /* Copyright (C) 2021 MediaTek Inc. */ |
| 3 | |
| 4 | #include <linux/kernel.h> |
| 5 | #include <linux/mmc/sdio_func.h> |
| 6 | #include <linux/module.h> |
| 7 | #include <linux/iopoll.h> |
| 8 | |
| 9 | #include "mt7921.h" |
| 10 | #include "../sdio.h" |
| 11 | #include "mac.h" |
| 12 | #include "mcu.h" |
| 13 | #include "regs.h" |
| 14 | |
| 15 | static int |
| 16 | mt7921s_mcu_send_message(struct mt76_dev *mdev, struct sk_buff *skb, |
| 17 | int cmd, int *seq) |
| 18 | { |
| 19 | struct mt7921_dev *dev = container_of(mdev, struct mt7921_dev, mt76); |
| 20 | enum mt7921_sdio_pkt_type type = MT7921_SDIO_CMD; |
| 21 | enum mt76_mcuq_id txq = MT_MCUQ_WM; |
| 22 | int ret, pad; |
| 23 | |
| 24 | /* We just return in case firmware assertion to avoid blocking the |
| 25 | * common workqueue to run, for example, the coredump work might be |
| 26 | * blocked by mt7921_mac_work that is excuting register access via sdio |
| 27 | * bus. |
| 28 | */ |
| 29 | if (dev->fw_assert) |
| 30 | return -EBUSY; |
| 31 | |
| 32 | ret = mt7921_mcu_fill_message(mdev, skb, cmd, seq); |
| 33 | if (ret) |
| 34 | return ret; |
| 35 | |
| 36 | if (cmd == MCU_CMD(FW_SCATTER)) |
| 37 | type = MT7921_SDIO_FWDL; |
| 38 | |
| 39 | mt7921_skb_add_usb_sdio_hdr(dev, skb, type); |
| 40 | pad = round_up(skb->len, 4) - skb->len; |
| 41 | __skb_put_zero(skb, pad); |
| 42 | |
| 43 | ret = mt76_tx_queue_skb_raw(dev, mdev->q_mcu[txq], skb, 0); |
| 44 | if (ret) |
| 45 | return ret; |
| 46 | |
| 47 | mt76_queue_kick(dev, mdev->q_mcu[txq]); |
| 48 | |
| 49 | return ret; |
| 50 | } |
| 51 | |
| 52 | static u32 mt7921s_read_rm3r(struct mt7921_dev *dev) |
| 53 | { |
| 54 | struct mt76_sdio *sdio = &dev->mt76.sdio; |
| 55 | |
| 56 | return sdio_readl(sdio->func, MCR_D2HRM3R, NULL); |
| 57 | } |
| 58 | |
| 59 | static u32 mt7921s_clear_rm3r_drv_own(struct mt7921_dev *dev) |
| 60 | { |
| 61 | struct mt76_sdio *sdio = &dev->mt76.sdio; |
| 62 | u32 val; |
| 63 | |
| 64 | val = sdio_readl(sdio->func, MCR_D2HRM3R, NULL); |
| 65 | if (val) |
| 66 | sdio_writel(sdio->func, H2D_SW_INT_CLEAR_MAILBOX_ACK, |
| 67 | MCR_WSICR, NULL); |
| 68 | |
| 69 | return val; |
| 70 | } |
| 71 | |
| 72 | int mt7921s_mcu_init(struct mt7921_dev *dev) |
| 73 | { |
| 74 | static const struct mt76_mcu_ops mt7921s_mcu_ops = { |
| 75 | .headroom = MT_SDIO_HDR_SIZE + sizeof(struct mt7921_mcu_txd), |
| 76 | .tailroom = MT_SDIO_TAIL_SIZE, |
| 77 | .mcu_skb_send_msg = mt7921s_mcu_send_message, |
| 78 | .mcu_parse_response = mt7921_mcu_parse_response, |
| 79 | .mcu_rr = mt76_connac_mcu_reg_rr, |
| 80 | .mcu_wr = mt76_connac_mcu_reg_wr, |
| 81 | }; |
| 82 | int ret; |
| 83 | |
| 84 | mt7921s_mcu_drv_pmctrl(dev); |
| 85 | |
| 86 | dev->mt76.mcu_ops = &mt7921s_mcu_ops; |
| 87 | |
| 88 | ret = mt7921_run_firmware(dev); |
| 89 | if (ret) |
| 90 | return ret; |
| 91 | |
| 92 | set_bit(MT76_STATE_MCU_RUNNING, &dev->mphy.state); |
| 93 | |
| 94 | return 0; |
| 95 | } |
| 96 | |
| 97 | int mt7921s_mcu_drv_pmctrl(struct mt7921_dev *dev) |
| 98 | { |
| 99 | struct sdio_func *func = dev->mt76.sdio.func; |
| 100 | struct mt76_phy *mphy = &dev->mt76.phy; |
| 101 | struct mt76_connac_pm *pm = &dev->pm; |
| 102 | int err = 0; |
| 103 | u32 status; |
| 104 | |
| 105 | sdio_claim_host(func); |
| 106 | |
| 107 | sdio_writel(func, WHLPCR_FW_OWN_REQ_CLR, MCR_WHLPCR, NULL); |
| 108 | |
| 109 | err = readx_poll_timeout(mt76s_read_pcr, &dev->mt76, status, |
| 110 | status & WHLPCR_IS_DRIVER_OWN, 2000, 1000000); |
| 111 | |
| 112 | if (!err && test_bit(MT76_STATE_MCU_RUNNING, &dev->mphy.state)) |
| 113 | err = readx_poll_timeout(mt7921s_read_rm3r, dev, status, |
| 114 | status & D2HRM3R_IS_DRIVER_OWN, |
| 115 | 2000, 1000000); |
| 116 | |
| 117 | sdio_release_host(func); |
| 118 | |
| 119 | if (err < 0) { |
| 120 | dev_err(dev->mt76.dev, "driver own failed\n"); |
| 121 | err = -EIO; |
| 122 | goto out; |
| 123 | } |
| 124 | |
| 125 | clear_bit(MT76_STATE_PM, &mphy->state); |
| 126 | |
| 127 | pm->stats.last_wake_event = jiffies; |
| 128 | pm->stats.doze_time += pm->stats.last_wake_event - |
| 129 | pm->stats.last_doze_event; |
| 130 | out: |
| 131 | return err; |
| 132 | } |
| 133 | |
| 134 | int mt7921s_mcu_fw_pmctrl(struct mt7921_dev *dev) |
| 135 | { |
| 136 | struct sdio_func *func = dev->mt76.sdio.func; |
| 137 | struct mt76_phy *mphy = &dev->mt76.phy; |
| 138 | struct mt76_connac_pm *pm = &dev->pm; |
| 139 | int err = 0; |
| 140 | u32 status; |
| 141 | |
| 142 | sdio_claim_host(func); |
| 143 | |
| 144 | if (test_bit(MT76_STATE_MCU_RUNNING, &dev->mphy.state)) { |
| 145 | err = readx_poll_timeout(mt7921s_clear_rm3r_drv_own, |
| 146 | dev, status, |
| 147 | !(status & D2HRM3R_IS_DRIVER_OWN), |
| 148 | 2000, 1000000); |
| 149 | if (err < 0) { |
| 150 | dev_err(dev->mt76.dev, "mailbox ACK not cleared\n"); |
| 151 | goto err; |
| 152 | } |
| 153 | } |
| 154 | |
| 155 | sdio_writel(func, WHLPCR_FW_OWN_REQ_SET, MCR_WHLPCR, NULL); |
| 156 | |
| 157 | err = readx_poll_timeout(mt76s_read_pcr, &dev->mt76, status, |
| 158 | !(status & WHLPCR_IS_DRIVER_OWN), 2000, 1000000); |
| 159 | sdio_release_host(func); |
| 160 | |
| 161 | err: |
| 162 | if (err < 0) { |
| 163 | dev_err(dev->mt76.dev, "firmware own failed\n"); |
| 164 | clear_bit(MT76_STATE_PM, &mphy->state); |
| 165 | err = -EIO; |
| 166 | } |
| 167 | |
| 168 | pm->stats.last_doze_event = jiffies; |
| 169 | pm->stats.awake_time += pm->stats.last_doze_event - |
| 170 | pm->stats.last_wake_event; |
| 171 | |
| 172 | return err; |
| 173 | } |