[PATCH v2 9/9] mt76: mt7921: add mt7921u driver
Lorenzo Bianconi
lorenzo at kernel.org
Sat Mar 5 07:38:19 PST 2022
Introduce support for MT7921U 802.11ax 2x2:2SS wireless devices.
Tested-by: Sean Wang <sean.wang at mediatek.com>
Tested-by: Deren Wu <deren.wu at mediatek.com>
Signed-off-by: Lorenzo Bianconi <lorenzo at kernel.org>
---
.../net/wireless/mediatek/mt76/mt7921/Kconfig | 11 +
.../wireless/mediatek/mt76/mt7921/Makefile | 2 +
.../net/wireless/mediatek/mt76/mt7921/init.c | 2 +-
.../net/wireless/mediatek/mt76/mt7921/mac.h | 1 +
.../net/wireless/mediatek/mt76/mt7921/main.c | 3 +-
.../wireless/mediatek/mt76/mt7921/mt7921.h | 10 +
.../net/wireless/mediatek/mt76/mt7921/regs.h | 50 ++-
.../net/wireless/mediatek/mt76/mt7921/usb.c | 304 ++++++++++++++++++
.../wireless/mediatek/mt76/mt7921/usb_mac.c | 195 +++++++++++
9 files changed, 575 insertions(+), 3 deletions(-)
create mode 100644 drivers/net/wireless/mediatek/mt76/mt7921/usb.c
create mode 100644 drivers/net/wireless/mediatek/mt76/mt7921/usb_mac.c
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/Kconfig b/drivers/net/wireless/mediatek/mt76/mt7921/Kconfig
index 71154fc2a87c..adff2d7350b5 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/Kconfig
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/Kconfig
@@ -24,3 +24,14 @@ config MT7921S
This adds support for MT7921S 802.11ax 2x2:2SS wireless devices.
To compile this driver as a module, choose M here.
+
+config MT7921U
+ tristate "MediaTek MT7921U (USB) support"
+ select MT76_USB
+ select MT7921_COMMON
+ depends on MAC80211
+ depends on USB
+ help
+ This adds support for MT7921U 802.11ax 2x2:2SS wireless devices.
+
+ To compile this driver as a module, choose M here.
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/Makefile b/drivers/net/wireless/mediatek/mt76/mt7921/Makefile
index 1187acedfeda..0a146818c623 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/Makefile
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/Makefile
@@ -3,6 +3,7 @@
obj-$(CONFIG_MT7921_COMMON) += mt7921-common.o
obj-$(CONFIG_MT7921E) += mt7921e.o
obj-$(CONFIG_MT7921S) += mt7921s.o
+obj-$(CONFIG_MT7921U) += mt7921u.o
CFLAGS_trace.o := -I$(src)
@@ -10,3 +11,4 @@ mt7921-common-y := mac.o mcu.o main.o init.o debugfs.o trace.o
mt7921-common-$(CONFIG_NL80211_TESTMODE) += testmode.o
mt7921e-y := pci.o pci_mac.o pci_mcu.o dma.o
mt7921s-y := sdio.o sdio_mac.o sdio_mcu.o
+mt7921u-y := usb.o usb_mac.o
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/init.c b/drivers/net/wireless/mediatek/mt76/mt7921/init.c
index 54f51e7b48a0..ceb22653e4bb 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/init.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/init.c
@@ -233,7 +233,7 @@ int mt7921_register_device(struct mt7921_dev *dev)
dev->pm.ds_enable = true;
}
- if (mt76_is_sdio(&dev->mt76))
+ if (!mt76_is_mmio(&dev->mt76))
hw->extra_tx_headroom += MT_SDIO_TXD_SIZE + MT_SDIO_HDR_SIZE;
ret = mt7921_init_hardware(dev);
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/mac.h b/drivers/net/wireless/mediatek/mt76/mt7921/mac.h
index 12e1cf8abe6e..79447e2d0143 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/mac.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/mac.h
@@ -202,6 +202,7 @@ enum tx_mcu_port_q_idx {
#define MT_SDIO_TXD_SIZE (MT_TXD_SIZE + 8 * 4)
#define MT_SDIO_TAIL_SIZE 8
#define MT_SDIO_HDR_SIZE 4
+#define MT_USB_TAIL_SIZE 4
#define MT_TXD0_Q_IDX GENMASK(31, 25)
#define MT_TXD0_PKT_FMT GENMASK(24, 23)
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/main.c b/drivers/net/wireless/mediatek/mt76/mt7921/main.c
index b6e836a4fad7..4fe181bb111b 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/main.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/main.c
@@ -264,7 +264,7 @@ static int mt7921_start(struct ieee80211_hw *hw)
return err;
}
-static void mt7921_stop(struct ieee80211_hw *hw)
+void mt7921_stop(struct ieee80211_hw *hw)
{
struct mt7921_dev *dev = mt7921_hw_dev(hw);
struct mt7921_phy *phy = mt7921_hw_phy(hw);
@@ -281,6 +281,7 @@ static void mt7921_stop(struct ieee80211_hw *hw)
mt76_connac_mcu_set_mac_enable(&dev->mt76, 0, false, false);
mt7921_mutex_release(dev);
}
+EXPORT_SYMBOL_GPL(mt7921_stop);
static int mt7921_add_interface(struct ieee80211_hw *hw,
struct ieee80211_vif *vif)
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/mt7921.h b/drivers/net/wireless/mediatek/mt76/mt7921/mt7921.h
index b952372c5565..1f573ffc17ce 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/mt7921.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/mt7921.h
@@ -30,6 +30,7 @@
#define MT7921_DRV_OWN_RETRY_COUNT 10
#define MT7921_MCU_INIT_RETRY_COUNT 10
+#define MT7921_WFSYS_INIT_RETRY_COUNT 2
#define MT7921_FIRMWARE_WM "mediatek/WIFI_RAM_CODE_MT7961_1.bin"
#define MT7921_ROM_PATCH "mediatek/WIFI_MT7961_patch_mcu_1_2_hdr.bin"
@@ -365,6 +366,7 @@ mt7921_skb_add_usb_sdio_hdr(struct mt7921_dev *dev, struct sk_buff *skb,
put_unaligned_le32(hdr, skb_push(skb, sizeof(hdr)));
}
+void mt7921_stop(struct ieee80211_hw *hw);
int mt7921_mac_init(struct mt7921_dev *dev);
bool mt7921_mac_wtbl_update(struct mt7921_dev *dev, int idx, u32 mask);
void mt7921_mac_reset_counters(struct mt7921_phy *phy);
@@ -455,4 +457,12 @@ int mt7921_usb_sdio_tx_prepare_skb(struct mt76_dev *mdev, void *txwi_ptr,
void mt7921_usb_sdio_tx_complete_skb(struct mt76_dev *mdev,
struct mt76_queue_entry *e);
bool mt7921_usb_sdio_tx_status_data(struct mt76_dev *mdev, u8 *update);
+
+/* usb */
+#define MT_USB_TYPE_VENDOR (USB_TYPE_VENDOR | 0x1f)
+#define MT_USB_TYPE_UHW_VENDOR (USB_TYPE_VENDOR | 0x1e)
+
+int mt7921u_wfsys_reset(struct mt7921_dev *dev);
+int mt7921u_dma_init(struct mt7921_dev *dev);
+int mt7921u_init_reset(struct mt7921_dev *dev);
#endif
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/regs.h b/drivers/net/wireless/mediatek/mt76/mt7921/regs.h
index 33578e0dfde3..6712ff60c722 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/regs.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/regs.h
@@ -353,6 +353,7 @@
#define MT_WFDMA0_GLO_CFG_RX_DMA_EN BIT(2)
#define MT_WFDMA0_GLO_CFG_RX_DMA_BUSY BIT(3)
#define MT_WFDMA0_GLO_CFG_TX_WB_DDONE BIT(6)
+#define MT_WFDMA0_GLO_CFG_FW_DWLD_BYPASS_DMASHDL BIT(9)
#define MT_WFDMA0_GLO_CFG_FIFO_LITTLE_ENDIAN BIT(12)
#define MT_WFDMA0_GLO_CFG_CSR_DISP_BASE_PTR_CHAIN_EN BIT(15)
#define MT_WFDMA0_GLO_CFG_OMIT_RX_INFO_PFET2 BIT(21)
@@ -377,6 +378,9 @@
#define MT_WFDMA0_TX_RING16_EXT_CTRL MT_WFDMA0(0x640)
#define MT_WFDMA0_TX_RING17_EXT_CTRL MT_WFDMA0(0x644)
+#define MT_WPDMA0_MAX_CNT_MASK GENMASK(7, 0)
+#define MT_WPDMA0_BASE_PTR_MASK GENMASK(31, 16)
+
#define MT_WFDMA0_RX_RING0_EXT_CTRL MT_WFDMA0(0x680)
#define MT_WFDMA0_RX_RING1_EXT_CTRL MT_WFDMA0(0x684)
#define MT_WFDMA0_RX_RING2_EXT_CTRL MT_WFDMA0(0x688)
@@ -425,6 +429,10 @@
#define MT_WFDMA_DUMMY_CR MT_MCU_WPDMA0(0x120)
#define MT_WFDMA_NEED_REINIT BIT(1)
+#define MT_CBTOP_RGU(ofs) (0x70002000 + (ofs))
+#define MT_CBTOP_RGU_WF_SUBSYS_RST MT_CBTOP_RGU(0x600)
+#define MT_CBTOP_RGU_WF_SUBSYS_RST_WF_WHOLE_PATH BIT(0)
+
#define MT_HW_BOUND 0x70010020
#define MT_HW_CHIPID 0x70010200
#define MT_HW_REV 0x70010204
@@ -433,12 +441,14 @@
#define MT_PCIE_MAC(ofs) (MT_PCIE_MAC_BASE + (ofs))
#define MT_PCIE_MAC_INT_ENABLE MT_PCIE_MAC(0x188)
-#define MT_DMA_SHDL(ofs) (0xd6000 + (ofs))
+#define MT_DMA_SHDL(ofs) (0x7c026000 + (ofs))
#define MT_DMASHDL_SW_CONTROL MT_DMA_SHDL(0x004)
#define MT_DMASHDL_DMASHDL_BYPASS BIT(28)
#define MT_DMASHDL_OPTIONAL MT_DMA_SHDL(0x008)
#define MT_DMASHDL_PAGE MT_DMA_SHDL(0x00c)
+#define MT_DMASHDL_GROUP_SEQ_ORDER BIT(16)
#define MT_DMASHDL_REFILL MT_DMA_SHDL(0x010)
+#define MT_DMASHDL_REFILL_MASK GENMASK(31, 16)
#define MT_DMASHDL_PKT_MAX_SIZE MT_DMA_SHDL(0x01c)
#define MT_DMASHDL_PKT_MAX_SIZE_PLE GENMASK(11, 0)
#define MT_DMASHDL_PKT_MAX_SIZE_PSE GENMASK(27, 16)
@@ -453,6 +463,43 @@
#define MT_DMASHDL_SCHED_SET(_n) MT_DMA_SHDL(0x070 + ((_n) << 2))
+#define MT_WFDMA_HOST_CONFIG 0x7c027030
+#define MT_WFDMA_HOST_CONFIG_USB_RXEVT_EP4_EN BIT(6)
+
+#define MT_UMAC(ofs) (0x74000000 + (ofs))
+#define MT_UDMA_TX_QSEL MT_UMAC(0x008)
+#define MT_FW_DL_EN BIT(3)
+
+#define MT_UDMA_WLCFG_1 MT_UMAC(0x00c)
+#define MT_WL_RX_AGG_PKT_LMT GENMASK(7, 0)
+#define MT_WL_TX_TMOUT_LMT GENMASK(27, 8)
+
+#define MT_UDMA_WLCFG_0 MT_UMAC(0x18)
+#define MT_WL_RX_AGG_TO GENMASK(7, 0)
+#define MT_WL_RX_AGG_LMT GENMASK(15, 8)
+#define MT_WL_TX_TMOUT_FUNC_EN BIT(16)
+#define MT_WL_TX_DPH_CHK_EN BIT(17)
+#define MT_WL_RX_MPSZ_PAD0 BIT(18)
+#define MT_WL_RX_FLUSH BIT(19)
+#define MT_TICK_1US_EN BIT(20)
+#define MT_WL_RX_AGG_EN BIT(21)
+#define MT_WL_RX_EN BIT(22)
+#define MT_WL_TX_EN BIT(23)
+#define MT_WL_RX_BUSY BIT(30)
+#define MT_WL_TX_BUSY BIT(31)
+
+#define MT_UDMA_CONN_INFRA_STATUS MT_UMAC(0xa20)
+#define MT_UDMA_CONN_WFSYS_INIT_DONE BIT(22)
+#define MT_UDMA_CONN_INFRA_STATUS_SEL MT_UMAC(0xa24)
+
+#define MT_SSUSB_EPCTL_CSR(ofs) (0x74011800 + (ofs))
+#define MT_SSUSB_EPCTL_CSR_EP_RST_OPT MT_SSUSB_EPCTL_CSR(0x090)
+
+#define MT_UWFDMA0(ofs) (0x7c024000 + (ofs))
+#define MT_UWFDMA0_GLO_CFG MT_UWFDMA0(0x208)
+#define MT_UWFDMA0_GLO_CFG_EXT0 MT_UWFDMA0(0x2b0)
+#define MT_UWFDMA0_TX_RING_EXT_CTRL(_n) MT_UWFDMA0(0x600 + ((_n) << 2))
+
#define MT_CONN_STATUS 0x7c053c10
#define MT_WIFI_PATCH_DL_STATE BIT(0)
@@ -466,6 +513,7 @@
#define WFSYS_SW_INIT_DONE BIT(4)
#define MT_CONN_ON_MISC 0x7c0600f0
+#define MT_TOP_MISC2_FW_PWR_ON BIT(0)
#define MT_TOP_MISC2_FW_N9_RDY GENMASK(1, 0)
#endif
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/usb.c b/drivers/net/wireless/mediatek/mt76/mt7921/usb.c
new file mode 100644
index 000000000000..4d8ccd640d3d
--- /dev/null
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/usb.c
@@ -0,0 +1,304 @@
+// SPDX-License-Identifier: ISC
+/* Copyright (C) 2022 MediaTek Inc.
+ *
+ * Author: Lorenzo Bianconi <lorenzo at kernel.org>
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/usb.h>
+
+#include "mt7921.h"
+#include "mcu.h"
+#include "mac.h"
+
+static const struct usb_device_id mt7921u_device_table[] = {
+ { USB_DEVICE_AND_INTERFACE_INFO(0x0e8d, 0x7961, 0xff, 0xff, 0xff) },
+ { },
+};
+
+static u32 mt7921u_rr(struct mt76_dev *dev, u32 addr)
+{
+ u32 ret;
+
+ mutex_lock(&dev->usb.usb_ctrl_mtx);
+ ret = ___mt76u_rr(dev, MT_VEND_READ_EXT,
+ USB_DIR_IN | MT_USB_TYPE_VENDOR, addr);
+ mutex_unlock(&dev->usb.usb_ctrl_mtx);
+
+ return ret;
+}
+
+static void mt7921u_wr(struct mt76_dev *dev, u32 addr, u32 val)
+{
+ mutex_lock(&dev->usb.usb_ctrl_mtx);
+ ___mt76u_wr(dev, MT_VEND_WRITE_EXT,
+ USB_DIR_OUT | MT_USB_TYPE_VENDOR, addr, val);
+ mutex_unlock(&dev->usb.usb_ctrl_mtx);
+}
+
+static u32 mt7921u_rmw(struct mt76_dev *dev, u32 addr,
+ u32 mask, u32 val)
+{
+ mutex_lock(&dev->usb.usb_ctrl_mtx);
+ val |= ___mt76u_rr(dev, MT_VEND_READ_EXT,
+ USB_DIR_IN | MT_USB_TYPE_VENDOR, addr) & ~mask;
+ ___mt76u_wr(dev, MT_VEND_WRITE_EXT,
+ USB_DIR_OUT | MT_USB_TYPE_VENDOR, addr, val);
+ mutex_unlock(&dev->usb.usb_ctrl_mtx);
+
+ return val;
+}
+
+static void mt7921u_copy(struct mt76_dev *dev, u32 offset,
+ const void *data, int len)
+{
+ struct mt76_usb *usb = &dev->usb;
+ int ret, i = 0, batch_len;
+ const u8 *val = data;
+
+ len = round_up(len, 4);
+
+ mutex_lock(&usb->usb_ctrl_mtx);
+ while (i < len) {
+ batch_len = min_t(int, usb->data_len, len - i);
+ memcpy(usb->data, val + i, batch_len);
+ ret = __mt76u_vendor_request(dev, MT_VEND_WRITE_EXT,
+ USB_DIR_OUT | MT_USB_TYPE_VENDOR,
+ (offset + i) >> 16, offset + i,
+ usb->data, batch_len);
+ if (ret < 0)
+ break;
+
+ i += batch_len;
+ }
+ mutex_unlock(&usb->usb_ctrl_mtx);
+}
+
+static int mt7921u_mcu_power_on(struct mt7921_dev *dev)
+{
+ int ret;
+
+ ret = mt76u_vendor_request(&dev->mt76, MT_VEND_POWER_ON,
+ USB_DIR_OUT | MT_USB_TYPE_VENDOR,
+ 0x0, 0x1, NULL, 0);
+ if (ret)
+ return ret;
+
+ if (!mt76_poll_msec(dev, MT_CONN_ON_MISC, MT_TOP_MISC2_FW_PWR_ON,
+ MT_TOP_MISC2_FW_PWR_ON, 500)) {
+ dev_err(dev->mt76.dev, "Timeout for power on\n");
+ ret = -EIO;
+ }
+
+ return ret;
+}
+
+static int
+mt7921u_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);
+ u32 pad, ep;
+ int ret;
+
+ ret = mt7921_mcu_fill_message(mdev, skb, cmd, seq);
+ if (ret)
+ return ret;
+
+ if (cmd != MCU_CMD(FW_SCATTER))
+ ep = MT_EP_OUT_INBAND_CMD;
+ else
+ ep = MT_EP_OUT_AC_BE;
+
+ mt7921_skb_add_usb_sdio_hdr(dev, skb, 0);
+ pad = round_up(skb->len, 4) + 4 - skb->len;
+ __skb_put_zero(skb, pad);
+
+ ret = mt76u_bulk_msg(&dev->mt76, skb->data, skb->len, NULL,
+ 1000, ep);
+ dev_kfree_skb(skb);
+
+ return ret;
+}
+
+static int mt7921u_mcu_init(struct mt7921_dev *dev)
+{
+ static const struct mt76_mcu_ops mcu_ops = {
+ .headroom = MT_SDIO_HDR_SIZE + sizeof(struct mt7921_mcu_txd),
+ .tailroom = MT_USB_TAIL_SIZE,
+ .mcu_skb_send_msg = mt7921u_mcu_send_message,
+ .mcu_parse_response = mt7921_mcu_parse_response,
+ .mcu_restart = mt76_connac_mcu_restart,
+ };
+ int ret;
+
+ dev->mt76.mcu_ops = &mcu_ops;
+
+ mt76_set(dev, MT_UDMA_TX_QSEL, MT_FW_DL_EN);
+ ret = mt7921_run_firmware(dev);
+ if (ret)
+ return ret;
+
+ set_bit(MT76_STATE_MCU_RUNNING, &dev->mphy.state);
+ mt76_clear(dev, MT_UDMA_TX_QSEL, MT_FW_DL_EN);
+
+ return 0;
+}
+
+static void mt7921u_stop(struct ieee80211_hw *hw)
+{
+ struct mt7921_dev *dev = mt7921_hw_dev(hw);
+
+ mt76u_stop_tx(&dev->mt76);
+ mt7921_stop(hw);
+}
+
+static void mt7921u_cleanup(struct mt7921_dev *dev)
+{
+ clear_bit(MT76_STATE_INITIALIZED, &dev->mphy.state);
+ mt7921u_wfsys_reset(dev);
+ mt7921_mcu_exit(dev);
+ mt76u_queues_deinit(&dev->mt76);
+}
+
+static int mt7921u_probe(struct usb_interface *usb_intf,
+ const struct usb_device_id *id)
+{
+ static const struct mt76_driver_ops drv_ops = {
+ .txwi_size = MT_SDIO_TXD_SIZE,
+ .drv_flags = MT_DRV_RX_DMA_HDR | MT_DRV_HW_MGMT_TXQ,
+ .survey_flags = SURVEY_INFO_TIME_TX |
+ SURVEY_INFO_TIME_RX |
+ SURVEY_INFO_TIME_BSS_RX,
+ .tx_prepare_skb = mt7921_usb_sdio_tx_prepare_skb,
+ .tx_complete_skb = mt7921_usb_sdio_tx_complete_skb,
+ .tx_status_data = mt7921_usb_sdio_tx_status_data,
+ .rx_skb = mt7921_queue_rx_skb,
+ .sta_ps = mt7921_sta_ps,
+ .sta_add = mt7921_mac_sta_add,
+ .sta_assoc = mt7921_mac_sta_assoc,
+ .sta_remove = mt7921_mac_sta_remove,
+ .update_survey = mt7921_update_channel,
+ };
+ static const struct mt7921_hif_ops hif_ops = {
+ .mcu_init = mt7921u_mcu_init,
+ .init_reset = mt7921u_init_reset,
+ };
+ static struct mt76_bus_ops bus_ops = {
+ .rr = mt7921u_rr,
+ .wr = mt7921u_wr,
+ .rmw = mt7921u_rmw,
+ .read_copy = mt76u_read_copy,
+ .write_copy = mt7921u_copy,
+ .type = MT76_BUS_USB,
+ };
+ struct usb_device *udev = interface_to_usbdev(usb_intf);
+ struct ieee80211_ops *ops;
+ struct ieee80211_hw *hw;
+ struct mt7921_dev *dev;
+ struct mt76_dev *mdev;
+ int ret;
+
+ ops = devm_kmemdup(&usb_intf->dev, &mt7921_ops, sizeof(mt7921_ops),
+ GFP_KERNEL);
+ if (!ops)
+ return -ENOMEM;
+
+ ops->stop = mt7921u_stop;
+
+ mdev = mt76_alloc_device(&usb_intf->dev, sizeof(*dev), ops, &drv_ops);
+ if (!mdev)
+ return -ENOMEM;
+
+ dev = container_of(mdev, struct mt7921_dev, mt76);
+ dev->hif_ops = &hif_ops;
+
+ udev = usb_get_dev(udev);
+ usb_reset_device(udev);
+
+ usb_set_intfdata(usb_intf, dev);
+
+ ret = __mt76u_init(mdev, usb_intf, &bus_ops);
+ if (ret < 0)
+ goto error;
+
+ mdev->rev = (mt76_rr(dev, MT_HW_CHIPID) << 16) |
+ (mt76_rr(dev, MT_HW_REV) & 0xff);
+ dev_dbg(mdev->dev, "ASIC revision: %04x\n", mdev->rev);
+
+ if (mt76_get_field(dev, MT_CONN_ON_MISC, MT_TOP_MISC2_FW_N9_RDY)) {
+ ret = mt7921u_wfsys_reset(dev);
+ if (ret)
+ goto error;
+ }
+
+ ret = mt7921u_mcu_power_on(dev);
+ if (ret)
+ goto error;
+
+ ret = mt76u_alloc_mcu_queue(&dev->mt76);
+ if (ret)
+ goto error;
+
+ ret = mt76u_alloc_queues(&dev->mt76);
+ if (ret)
+ goto error;
+
+ ret = mt7921u_dma_init(dev);
+ if (ret)
+ return ret;
+
+ hw = mt76_hw(dev);
+ /* check hw sg support in order to enable AMSDU */
+ hw->max_tx_fragments = mdev->usb.sg_en ? MT_HW_TXP_MAX_BUF_NUM : 1;
+
+ ret = mt7921_register_device(dev);
+ if (ret)
+ goto error;
+
+ return 0;
+
+error:
+ mt76u_queues_deinit(&dev->mt76);
+
+ usb_set_intfdata(usb_intf, NULL);
+ usb_put_dev(interface_to_usbdev(usb_intf));
+
+ mt76_free_device(&dev->mt76);
+
+ return ret;
+}
+
+static void mt7921u_disconnect(struct usb_interface *usb_intf)
+{
+ struct mt7921_dev *dev = usb_get_intfdata(usb_intf);
+
+ if (!test_bit(MT76_STATE_INITIALIZED, &dev->mphy.state))
+ return;
+
+ mt76_unregister_device(&dev->mt76);
+ mt7921u_cleanup(dev);
+
+ usb_set_intfdata(usb_intf, NULL);
+ usb_put_dev(interface_to_usbdev(usb_intf));
+
+ mt76_free_device(&dev->mt76);
+}
+
+MODULE_DEVICE_TABLE(usb, mt7921u_device_table);
+MODULE_FIRMWARE(MT7921_FIRMWARE_WM);
+MODULE_FIRMWARE(MT7921_ROM_PATCH);
+
+static struct usb_driver mt7921u_driver = {
+ .name = KBUILD_MODNAME,
+ .id_table = mt7921u_device_table,
+ .probe = mt7921u_probe,
+ .disconnect = mt7921u_disconnect,
+ .soft_unbind = 1,
+ .disable_hub_initiated_lpm = 1,
+};
+module_usb_driver(mt7921u_driver);
+
+MODULE_AUTHOR("Lorenzo Bianconi <lorenzo at kernel.org>");
+MODULE_LICENSE("Dual BSD/GPL");
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/usb_mac.c b/drivers/net/wireless/mediatek/mt76/mt7921/usb_mac.c
new file mode 100644
index 000000000000..420445f790ca
--- /dev/null
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/usb_mac.c
@@ -0,0 +1,195 @@
+// SPDX-License-Identifier: ISC
+/* Copyright (C) 2022 MediaTek Inc.
+ *
+ * Author: Lorenzo Bianconi <lorenzo at kernel.org>
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/usb.h>
+
+#include "mt7921.h"
+#include "mcu.h"
+#include "mac.h"
+
+static u32 mt7921u_uhw_rr(struct mt76_dev *dev, u32 addr)
+{
+ u32 ret;
+
+ mutex_lock(&dev->usb.usb_ctrl_mtx);
+ ret = ___mt76u_rr(dev, MT_VEND_DEV_MODE,
+ USB_DIR_IN | MT_USB_TYPE_UHW_VENDOR, addr);
+ mutex_unlock(&dev->usb.usb_ctrl_mtx);
+
+ return ret;
+}
+
+static void mt7921u_uhw_wr(struct mt76_dev *dev, u32 addr, u32 val)
+{
+ mutex_lock(&dev->usb.usb_ctrl_mtx);
+ ___mt76u_wr(dev, MT_VEND_WRITE,
+ USB_DIR_OUT | MT_USB_TYPE_UHW_VENDOR, addr, val);
+ mutex_unlock(&dev->usb.usb_ctrl_mtx);
+}
+
+static void mt7921u_dma_prefetch(struct mt7921_dev *dev)
+{
+ mt76_rmw(dev, MT_UWFDMA0_TX_RING_EXT_CTRL(0),
+ MT_WPDMA0_MAX_CNT_MASK, 4);
+ mt76_rmw(dev, MT_UWFDMA0_TX_RING_EXT_CTRL(0),
+ MT_WPDMA0_BASE_PTR_MASK, 0x80);
+
+ mt76_rmw(dev, MT_UWFDMA0_TX_RING_EXT_CTRL(1),
+ MT_WPDMA0_MAX_CNT_MASK, 4);
+ mt76_rmw(dev, MT_UWFDMA0_TX_RING_EXT_CTRL(1),
+ MT_WPDMA0_BASE_PTR_MASK, 0xc0);
+
+ mt76_rmw(dev, MT_UWFDMA0_TX_RING_EXT_CTRL(2),
+ MT_WPDMA0_MAX_CNT_MASK, 4);
+ mt76_rmw(dev, MT_UWFDMA0_TX_RING_EXT_CTRL(2),
+ MT_WPDMA0_BASE_PTR_MASK, 0x100);
+
+ mt76_rmw(dev, MT_UWFDMA0_TX_RING_EXT_CTRL(3),
+ MT_WPDMA0_MAX_CNT_MASK, 4);
+ mt76_rmw(dev, MT_UWFDMA0_TX_RING_EXT_CTRL(3),
+ MT_WPDMA0_BASE_PTR_MASK, 0x140);
+
+ mt76_rmw(dev, MT_UWFDMA0_TX_RING_EXT_CTRL(4),
+ MT_WPDMA0_MAX_CNT_MASK, 4);
+ mt76_rmw(dev, MT_UWFDMA0_TX_RING_EXT_CTRL(4),
+ MT_WPDMA0_BASE_PTR_MASK, 0x180);
+
+ mt76_rmw(dev, MT_UWFDMA0_TX_RING_EXT_CTRL(16),
+ MT_WPDMA0_MAX_CNT_MASK, 4);
+ mt76_rmw(dev, MT_UWFDMA0_TX_RING_EXT_CTRL(16),
+ MT_WPDMA0_BASE_PTR_MASK, 0x280);
+
+ mt76_rmw(dev, MT_UWFDMA0_TX_RING_EXT_CTRL(17),
+ MT_WPDMA0_MAX_CNT_MASK, 4);
+ mt76_rmw(dev, MT_UWFDMA0_TX_RING_EXT_CTRL(17),
+ MT_WPDMA0_BASE_PTR_MASK, 0x2c0);
+}
+
+static void mt7921u_wfdma_init(struct mt7921_dev *dev)
+{
+ mt7921u_dma_prefetch(dev);
+
+ mt76_clear(dev, MT_UWFDMA0_GLO_CFG, MT_WFDMA0_GLO_CFG_OMIT_RX_INFO);
+ mt76_set(dev, MT_UWFDMA0_GLO_CFG,
+ MT_WFDMA0_GLO_CFG_OMIT_TX_INFO |
+ MT_WFDMA0_GLO_CFG_OMIT_RX_INFO_PFET2 |
+ MT_WFDMA0_GLO_CFG_FW_DWLD_BYPASS_DMASHDL |
+ MT_WFDMA0_GLO_CFG_TX_DMA_EN |
+ MT_WFDMA0_GLO_CFG_RX_DMA_EN);
+
+ /* disable dmashdl */
+ mt76_clear(dev, MT_UWFDMA0_GLO_CFG_EXT0,
+ MT_WFDMA0_CSR_TX_DMASHDL_ENABLE);
+ mt76_set(dev, MT_DMASHDL_SW_CONTROL, MT_DMASHDL_DMASHDL_BYPASS);
+
+ mt76_set(dev, MT_WFDMA_DUMMY_CR, MT_WFDMA_NEED_REINIT);
+}
+
+static int mt7921u_dma_rx_evt_ep4(struct mt7921_dev *dev)
+{
+ if (!mt76_poll(dev, MT_UWFDMA0_GLO_CFG,
+ MT_WFDMA0_GLO_CFG_RX_DMA_BUSY, 0, 1000))
+ return -ETIMEDOUT;
+
+ mt76_clear(dev, MT_UWFDMA0_GLO_CFG, MT_WFDMA0_GLO_CFG_RX_DMA_EN);
+ mt76_set(dev, MT_WFDMA_HOST_CONFIG,
+ MT_WFDMA_HOST_CONFIG_USB_RXEVT_EP4_EN);
+ mt76_set(dev, MT_UWFDMA0_GLO_CFG, MT_WFDMA0_GLO_CFG_RX_DMA_EN);
+
+ return 0;
+}
+
+static void mt7921u_epctl_rst_opt(struct mt7921_dev *dev, bool reset)
+{
+ u32 val;
+
+ /* usb endpoint reset opt
+ * bits[4,9]: out blk ep 4-9
+ * bits[20,21]: in blk ep 4-5
+ * bits[22]: in int ep 6
+ */
+ val = mt7921u_uhw_rr(&dev->mt76, MT_SSUSB_EPCTL_CSR_EP_RST_OPT);
+ if (reset)
+ val |= GENMASK(9, 4) | GENMASK(22, 20);
+ else
+ val &= ~(GENMASK(9, 4) | GENMASK(22, 20));
+ mt7921u_uhw_wr(&dev->mt76, MT_SSUSB_EPCTL_CSR_EP_RST_OPT, val);
+}
+
+int mt7921u_dma_init(struct mt7921_dev *dev)
+{
+ int err;
+
+ mt7921u_wfdma_init(dev);
+
+ mt76_clear(dev, MT_UDMA_WLCFG_0, MT_WL_RX_FLUSH);
+
+ mt76_set(dev, MT_UDMA_WLCFG_0,
+ MT_WL_RX_EN | MT_WL_TX_EN |
+ MT_WL_RX_MPSZ_PAD0 | MT_TICK_1US_EN);
+ mt76_clear(dev, MT_UDMA_WLCFG_0,
+ MT_WL_RX_AGG_TO | MT_WL_RX_AGG_LMT);
+ mt76_clear(dev, MT_UDMA_WLCFG_1, MT_WL_RX_AGG_PKT_LMT);
+
+ err = mt7921u_dma_rx_evt_ep4(dev);
+ if (err)
+ return err;
+
+ mt7921u_epctl_rst_opt(dev, false);
+
+ return 0;
+}
+
+int mt7921u_wfsys_reset(struct mt7921_dev *dev)
+{
+ u32 val;
+ int i;
+
+ mt7921u_epctl_rst_opt(dev, false);
+
+ val = mt7921u_uhw_rr(&dev->mt76, MT_CBTOP_RGU_WF_SUBSYS_RST);
+ val |= MT_CBTOP_RGU_WF_SUBSYS_RST_WF_WHOLE_PATH;
+ mt7921u_uhw_wr(&dev->mt76, MT_CBTOP_RGU_WF_SUBSYS_RST, val);
+
+ usleep_range(10, 20);
+
+ val = mt7921u_uhw_rr(&dev->mt76, MT_CBTOP_RGU_WF_SUBSYS_RST);
+ val &= ~MT_CBTOP_RGU_WF_SUBSYS_RST_WF_WHOLE_PATH;
+ mt7921u_uhw_wr(&dev->mt76, MT_CBTOP_RGU_WF_SUBSYS_RST, val);
+
+ mt7921u_uhw_wr(&dev->mt76, MT_UDMA_CONN_INFRA_STATUS_SEL, 0);
+ for (i = 0; i < MT7921_WFSYS_INIT_RETRY_COUNT; i++) {
+ val = mt7921u_uhw_rr(&dev->mt76, MT_UDMA_CONN_INFRA_STATUS);
+ if (val & MT_UDMA_CONN_WFSYS_INIT_DONE)
+ break;
+
+ msleep(100);
+ }
+
+ if (i == MT7921_WFSYS_INIT_RETRY_COUNT)
+ return -ETIMEDOUT;
+
+ return 0;
+}
+
+int mt7921u_init_reset(struct mt7921_dev *dev)
+{
+ set_bit(MT76_RESET, &dev->mphy.state);
+
+ wake_up(&dev->mt76.mcu.wait);
+ mt7921_mcu_exit(dev);
+
+ mt76u_stop_rx(&dev->mt76);
+ mt76u_stop_tx(&dev->mt76);
+
+ mt7921u_wfsys_reset(dev);
+
+ clear_bit(MT76_RESET, &dev->mphy.state);
+
+ return mt76u_resume_rx(&dev->mt76);
+}
--
2.35.1
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