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1// SPDX-License-Identifier: ISC2/* Copyright (C) 2022 MediaTek Inc.3 *4 * Author: Lorenzo Bianconi <lorenzo@kernel.org>5 */6 7#include <linux/kernel.h>8#include <linux/module.h>9#include <linux/usb.h>10 11#include "mt7921.h"12#include "mcu.h"13#include "../mt76_connac2_mac.h"14 15static const struct usb_device_id mt7921u_device_table[] = {16 { USB_DEVICE_AND_INTERFACE_INFO(0x0e8d, 0x7961, 0xff, 0xff, 0xff),17 .driver_info = (kernel_ulong_t)MT7921_FIRMWARE_WM },18 /* Comfast CF-952AX */19 { USB_DEVICE_AND_INTERFACE_INFO(0x3574, 0x6211, 0xff, 0xff, 0xff),20 .driver_info = (kernel_ulong_t)MT7921_FIRMWARE_WM },21 /* Netgear, Inc. [A8000,AXE3000] */22 { USB_DEVICE_AND_INTERFACE_INFO(0x0846, 0x9060, 0xff, 0xff, 0xff),23 .driver_info = (kernel_ulong_t)MT7921_FIRMWARE_WM },24 { },25};26 27static int28mt7921u_mcu_send_message(struct mt76_dev *mdev, struct sk_buff *skb,29 int cmd, int *seq)30{31 struct mt792x_dev *dev = container_of(mdev, struct mt792x_dev, mt76);32 u32 pad, ep;33 int ret;34 35 ret = mt76_connac2_mcu_fill_message(mdev, skb, cmd, seq);36 if (ret)37 return ret;38 39 mdev->mcu.timeout = 3 * HZ;40 41 if (cmd != MCU_CMD(FW_SCATTER))42 ep = MT_EP_OUT_INBAND_CMD;43 else44 ep = MT_EP_OUT_AC_BE;45 46 mt792x_skb_add_usb_sdio_hdr(dev, skb, 0);47 pad = round_up(skb->len, 4) + 4 - skb->len;48 __skb_put_zero(skb, pad);49 50 ret = mt76u_bulk_msg(&dev->mt76, skb->data, skb->len, NULL,51 1000, ep);52 dev_kfree_skb(skb);53 54 return ret;55}56 57static int mt7921u_mcu_init(struct mt792x_dev *dev)58{59 static const struct mt76_mcu_ops mcu_ops = {60 .headroom = MT_SDIO_HDR_SIZE +61 sizeof(struct mt76_connac2_mcu_txd),62 .tailroom = MT_USB_TAIL_SIZE,63 .mcu_skb_send_msg = mt7921u_mcu_send_message,64 .mcu_parse_response = mt7921_mcu_parse_response,65 };66 int ret;67 68 dev->mt76.mcu_ops = &mcu_ops;69 70 mt76_set(dev, MT_UDMA_TX_QSEL, MT_FW_DL_EN);71 ret = mt7921_run_firmware(dev);72 if (ret)73 return ret;74 75 set_bit(MT76_STATE_MCU_RUNNING, &dev->mphy.state);76 mt76_clear(dev, MT_UDMA_TX_QSEL, MT_FW_DL_EN);77 78 return 0;79}80 81static int mt7921u_mac_reset(struct mt792x_dev *dev)82{83 int err;84 85 mt76_txq_schedule_all(&dev->mphy);86 mt76_worker_disable(&dev->mt76.tx_worker);87 88 set_bit(MT76_RESET, &dev->mphy.state);89 set_bit(MT76_MCU_RESET, &dev->mphy.state);90 91 wake_up(&dev->mt76.mcu.wait);92 skb_queue_purge(&dev->mt76.mcu.res_q);93 94 mt76u_stop_rx(&dev->mt76);95 mt76u_stop_tx(&dev->mt76);96 97 mt792xu_wfsys_reset(dev);98 99 clear_bit(MT76_MCU_RESET, &dev->mphy.state);100 err = mt76u_resume_rx(&dev->mt76);101 if (err)102 goto out;103 104 err = mt792xu_mcu_power_on(dev);105 if (err)106 goto out;107 108 err = mt792xu_dma_init(dev, false);109 if (err)110 goto out;111 112 mt76_wr(dev, MT_SWDEF_MODE, MT_SWDEF_NORMAL_MODE);113 mt76_set(dev, MT_UDMA_TX_QSEL, MT_FW_DL_EN);114 115 err = mt7921_run_firmware(dev);116 if (err)117 goto out;118 119 mt76_clear(dev, MT_UDMA_TX_QSEL, MT_FW_DL_EN);120 121 err = mt7921_mcu_set_eeprom(dev);122 if (err)123 goto out;124 125 err = mt7921_mac_init(dev);126 if (err)127 goto out;128 129 err = __mt7921_start(&dev->phy);130out:131 clear_bit(MT76_RESET, &dev->mphy.state);132 133 mt76_worker_enable(&dev->mt76.tx_worker);134 135 return err;136}137 138static int mt7921u_probe(struct usb_interface *usb_intf,139 const struct usb_device_id *id)140{141 static const struct mt76_driver_ops drv_ops = {142 .txwi_size = MT_SDIO_TXD_SIZE,143 .drv_flags = MT_DRV_RX_DMA_HDR | MT_DRV_HW_MGMT_TXQ |144 MT_DRV_AMSDU_OFFLOAD,145 .survey_flags = SURVEY_INFO_TIME_TX |146 SURVEY_INFO_TIME_RX |147 SURVEY_INFO_TIME_BSS_RX,148 .tx_prepare_skb = mt7921_usb_sdio_tx_prepare_skb,149 .tx_complete_skb = mt7921_usb_sdio_tx_complete_skb,150 .tx_status_data = mt7921_usb_sdio_tx_status_data,151 .rx_skb = mt7921_queue_rx_skb,152 .rx_check = mt7921_rx_check,153 .sta_add = mt7921_mac_sta_add,154 .sta_event = mt7921_mac_sta_event,155 .sta_remove = mt7921_mac_sta_remove,156 .update_survey = mt792x_update_channel,157 .set_channel = mt7921_set_channel,158 };159 static const struct mt792x_hif_ops hif_ops = {160 .mcu_init = mt7921u_mcu_init,161 .init_reset = mt792xu_init_reset,162 .reset = mt7921u_mac_reset,163 };164 static struct mt76_bus_ops bus_ops = {165 .rr = mt792xu_rr,166 .wr = mt792xu_wr,167 .rmw = mt792xu_rmw,168 .read_copy = mt76u_read_copy,169 .write_copy = mt792xu_copy,170 .type = MT76_BUS_USB,171 };172 struct usb_device *udev = interface_to_usbdev(usb_intf);173 struct ieee80211_ops *ops;174 struct ieee80211_hw *hw;175 struct mt792x_dev *dev;176 struct mt76_dev *mdev;177 u8 features;178 int ret;179 180 ops = mt792x_get_mac80211_ops(&usb_intf->dev, &mt7921_ops,181 (void *)id->driver_info, &features);182 if (!ops)183 return -ENOMEM;184 185 ops->stop = mt792xu_stop;186 mdev = mt76_alloc_device(&usb_intf->dev, sizeof(*dev), ops, &drv_ops);187 if (!mdev)188 return -ENOMEM;189 190 dev = container_of(mdev, struct mt792x_dev, mt76);191 dev->fw_features = features;192 dev->hif_ops = &hif_ops;193 194 udev = usb_get_dev(udev);195 usb_reset_device(udev);196 197 usb_set_intfdata(usb_intf, dev);198 199 ret = __mt76u_init(mdev, usb_intf, &bus_ops);200 if (ret < 0)201 goto error;202 203 mdev->rev = (mt76_rr(dev, MT_HW_CHIPID) << 16) |204 (mt76_rr(dev, MT_HW_REV) & 0xff);205 dev_dbg(mdev->dev, "ASIC revision: %04x\n", mdev->rev);206 207 if (mt76_get_field(dev, MT_CONN_ON_MISC, MT_TOP_MISC2_FW_N9_RDY)) {208 ret = mt792xu_wfsys_reset(dev);209 if (ret)210 goto error;211 }212 213 ret = mt792xu_mcu_power_on(dev);214 if (ret)215 goto error;216 217 ret = mt76u_alloc_mcu_queue(&dev->mt76);218 if (ret)219 goto error;220 221 ret = mt76u_alloc_queues(&dev->mt76);222 if (ret)223 goto error;224 225 ret = mt792xu_dma_init(dev, false);226 if (ret)227 goto error;228 229 hw = mt76_hw(dev);230 /* check hw sg support in order to enable AMSDU */231 hw->max_tx_fragments = mdev->usb.sg_en ? MT_HW_TXP_MAX_BUF_NUM : 1;232 233 ret = mt7921_register_device(dev);234 if (ret)235 goto error;236 237 return 0;238 239error:240 mt76u_queues_deinit(&dev->mt76);241 242 usb_set_intfdata(usb_intf, NULL);243 usb_put_dev(interface_to_usbdev(usb_intf));244 245 mt76_free_device(&dev->mt76);246 247 return ret;248}249 250#ifdef CONFIG_PM251static int mt7921u_suspend(struct usb_interface *intf, pm_message_t state)252{253 struct mt792x_dev *dev = usb_get_intfdata(intf);254 struct mt76_connac_pm *pm = &dev->pm;255 int err;256 257 pm->suspended = true;258 flush_work(&dev->reset_work);259 260 err = mt76_connac_mcu_set_hif_suspend(&dev->mt76, true);261 if (err)262 goto failed;263 264 mt76u_stop_rx(&dev->mt76);265 mt76u_stop_tx(&dev->mt76);266 267 return 0;268 269failed:270 pm->suspended = false;271 272 if (err < 0)273 mt792x_reset(&dev->mt76);274 275 return err;276}277 278static int mt7921u_resume(struct usb_interface *intf)279{280 struct mt792x_dev *dev = usb_get_intfdata(intf);281 struct mt76_connac_pm *pm = &dev->pm;282 bool reinit = true;283 int err, i;284 285 for (i = 0; i < 10; i++) {286 u32 val = mt76_rr(dev, MT_WF_SW_DEF_CR_USB_MCU_EVENT);287 288 if (!(val & MT_WF_SW_SER_TRIGGER_SUSPEND)) {289 reinit = false;290 break;291 }292 if (val & MT_WF_SW_SER_DONE_SUSPEND) {293 mt76_wr(dev, MT_WF_SW_DEF_CR_USB_MCU_EVENT, 0);294 break;295 }296 297 msleep(20);298 }299 300 if (reinit || mt792x_dma_need_reinit(dev)) {301 err = mt792xu_dma_init(dev, true);302 if (err)303 goto failed;304 }305 306 err = mt76u_resume_rx(&dev->mt76);307 if (err < 0)308 goto failed;309 310 err = mt76_connac_mcu_set_hif_suspend(&dev->mt76, false);311failed:312 pm->suspended = false;313 314 if (err < 0)315 mt792x_reset(&dev->mt76);316 317 return err;318}319#endif /* CONFIG_PM */320 321MODULE_DEVICE_TABLE(usb, mt7921u_device_table);322MODULE_FIRMWARE(MT7921_FIRMWARE_WM);323MODULE_FIRMWARE(MT7921_ROM_PATCH);324 325static struct usb_driver mt7921u_driver = {326 .name = KBUILD_MODNAME,327 .id_table = mt7921u_device_table,328 .probe = mt7921u_probe,329 .disconnect = mt792xu_disconnect,330#ifdef CONFIG_PM331 .suspend = mt7921u_suspend,332 .resume = mt7921u_resume,333 .reset_resume = mt7921u_resume,334#endif /* CONFIG_PM */335 .soft_unbind = 1,336 .disable_hub_initiated_lpm = 1,337};338module_usb_driver(mt7921u_driver);339 340MODULE_DESCRIPTION("MediaTek MT7921U (USB) wireless driver");341MODULE_AUTHOR("Lorenzo Bianconi <lorenzo@kernel.org>");342MODULE_LICENSE("Dual BSD/GPL");343