drivers/net/wireless/mediatek/mt76/mt76x0/pci.c

   1 // SPDX-License-Identifier: ISC
   2 /*
   3  * Copyright (C) 2016 Felix Fietkau <nbd@nbd.name>
   4  */
   5
   6 #include <linux/kernel.h>
   7 #include <linux/module.h>
   8 #include <linux/pci.h>
   9
  10 #include "mt76x0.h"
  11 #include "mcu.h"
  12
  13 static int mt76x0e_start(struct ieee80211_hw *hw)
  14 {
  15         struct mt76x02_dev *dev = hw->priv;
  16
  17         mt76x02_mac_start(dev);
  18         mt76x0_phy_calibrate(dev, true);
  19         ieee80211_queue_delayed_work(dev->mt76.hw, &dev->mt76.mac_work,
  20                                      MT_MAC_WORK_INTERVAL);
  21         ieee80211_queue_delayed_work(dev->mt76.hw, &dev->cal_work,
  22                                      MT_CALIBRATE_INTERVAL);
  23         set_bit(MT76_STATE_RUNNING, &dev->mphy.state);
  24
  25         return 0;
  26 }
  27
  28 static void mt76x0e_stop_hw(struct mt76x02_dev *dev)
  29 {
  30         cancel_delayed_work_sync(&dev->cal_work);
  31         cancel_delayed_work_sync(&dev->mt76.mac_work);
  32         clear_bit(MT76_RESTART, &dev->mphy.state);
  33
  34         if (!mt76_poll(dev, MT_WPDMA_GLO_CFG, MT_WPDMA_GLO_CFG_TX_DMA_BUSY,
  35                        0, 1000))
  36                 dev_warn(dev->mt76.dev, "TX DMA did not stop\n");
  37         mt76_clear(dev, MT_WPDMA_GLO_CFG, MT_WPDMA_GLO_CFG_TX_DMA_EN);
  38
  39         mt76x0_mac_stop(dev);
  40
  41         if (!mt76_poll(dev, MT_WPDMA_GLO_CFG, MT_WPDMA_GLO_CFG_RX_DMA_BUSY,
  42                        0, 1000))
  43                 dev_warn(dev->mt76.dev, "TX DMA did not stop\n");
  44         mt76_clear(dev, MT_WPDMA_GLO_CFG, MT_WPDMA_GLO_CFG_RX_DMA_EN);
  45 }
  46
  47 static void mt76x0e_stop(struct ieee80211_hw *hw)
  48 {
  49         struct mt76x02_dev *dev = hw->priv;
  50
  51         clear_bit(MT76_STATE_RUNNING, &dev->mphy.state);
  52         mt76x0e_stop_hw(dev);
  53 }
  54
  55 static void
  56 mt76x0e_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
  57               u32 queues, bool drop)
  58 {
  59 }
  60
  61 static const struct ieee80211_ops mt76x0e_ops = {
  62         .tx = mt76x02_tx,
  63         .start = mt76x0e_start,
  64         .stop = mt76x0e_stop,
  65         .add_interface = mt76x02_add_interface,
  66         .remove_interface = mt76x02_remove_interface,
  67         .config = mt76x0_config,
  68         .configure_filter = mt76x02_configure_filter,
  69         .bss_info_changed = mt76x02_bss_info_changed,
  70         .sta_state = mt76_sta_state,
  71         .sta_pre_rcu_remove = mt76_sta_pre_rcu_remove,
  72         .set_key = mt76x02_set_key,
  73         .conf_tx = mt76x02_conf_tx,
  74         .sw_scan_start = mt76_sw_scan,
  75         .sw_scan_complete = mt76x02_sw_scan_complete,
  76         .ampdu_action = mt76x02_ampdu_action,
  77         .sta_rate_tbl_update = mt76x02_sta_rate_tbl_update,
  78         .wake_tx_queue = mt76_wake_tx_queue,
  79         .get_survey = mt76_get_survey,
  80         .get_txpower = mt76_get_txpower,
  81         .flush = mt76x0e_flush,
  82         .set_tim = mt76_set_tim,
  83         .release_buffered_frames = mt76_release_buffered_frames,
  84         .set_coverage_class = mt76x02_set_coverage_class,
  85         .set_rts_threshold = mt76x02_set_rts_threshold,
  86         .get_antenna = mt76_get_antenna,
  87         .reconfig_complete = mt76x02_reconfig_complete,
  88 };
  89
  90 static int mt76x0e_init_hardware(struct mt76x02_dev *dev, bool resume)
  91 {
  92         int err;
  93
  94         mt76x0_chip_onoff(dev, true, false);
  95         if (!mt76x02_wait_for_mac(&dev->mt76))
  96                 return -ETIMEDOUT;
  97
  98         mt76x02_dma_disable(dev);
  99         err = mt76x0e_mcu_init(dev);
 100         if (err < 0)
 101                 return err;
 102
 103         if (!resume) {
 104                 err = mt76x02_dma_init(dev);
 105                 if (err < 0)
 106                         return err;
 107         }
 108
 109         err = mt76x0_init_hardware(dev);
 110         if (err < 0)
 111                 return err;
 112
 113         mt76x02e_init_beacon_config(dev);
 114
 115         if (mt76_chip(&dev->mt76) == 0x7610) {
 116                 u16 val;
 117
 118                 mt76_clear(dev, MT_COEXCFG0, BIT(0));
 119
 120                 val = mt76x02_eeprom_get(dev, MT_EE_NIC_CONF_0);
 121                 if (!(val & MT_EE_NIC_CONF_0_PA_IO_CURRENT))
 122                         mt76_set(dev, MT_XO_CTRL7, 0xc03);
 123         }
 124
 125         mt76_clear(dev, 0x110, BIT(9));
 126         mt76_set(dev, MT_MAX_LEN_CFG, BIT(13));
 127
 128         return 0;
 129 }
 130
 131 static int mt76x0e_register_device(struct mt76x02_dev *dev)
 132 {
 133         int err;
 134
 135         err = mt76x0e_init_hardware(dev, false);
 136         if (err < 0)
 137                 return err;
 138
 139         err = mt76x0_register_device(dev);
 140         if (err < 0)
 141                 return err;
 142
 143         set_bit(MT76_STATE_INITIALIZED, &dev->mphy.state);
 144
 145         return 0;
 146 }
 147
 148 static int
 149 mt76x0e_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 150 {
 151         static const struct mt76_driver_ops drv_ops = {
 152                 .txwi_size = sizeof(struct mt76x02_txwi),
 153                 .drv_flags = MT_DRV_TX_ALIGNED4_SKBS |
 154                              MT_DRV_SW_RX_AIRTIME,
 155                 .survey_flags = SURVEY_INFO_TIME_TX,
 156                 .update_survey = mt76x02_update_channel,
 157                 .tx_prepare_skb = mt76x02_tx_prepare_skb,
 158                 .tx_complete_skb = mt76x02_tx_complete_skb,
 159                 .rx_skb = mt76x02_queue_rx_skb,
 160                 .rx_poll_complete = mt76x02_rx_poll_complete,
 161                 .sta_ps = mt76x02_sta_ps,
 162                 .sta_add = mt76x02_sta_add,
 163                 .sta_remove = mt76x02_sta_remove,
 164         };
 165         struct mt76x02_dev *dev;
 166         struct mt76_dev *mdev;
 167         int ret;
 168
 169         ret = pcim_enable_device(pdev);
 170         if (ret)
 171                 return ret;
 172
 173         ret = pcim_iomap_regions(pdev, BIT(0), pci_name(pdev));
 174         if (ret)
 175                 return ret;
 176
 177         pci_set_master(pdev);
 178
 179         ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
 180         if (ret)
 181                 return ret;
 182
 183         mt76_pci_disable_aspm(pdev);
 184
 185         mdev = mt76_alloc_device(&pdev->dev, sizeof(*dev), &mt76x0e_ops,
 186                                  &drv_ops);
 187         if (!mdev)
 188                 return -ENOMEM;
 189
 190         dev = container_of(mdev, struct mt76x02_dev, mt76);
 191         mutex_init(&dev->phy_mutex);
 192
 193         mt76_mmio_init(mdev, pcim_iomap_table(pdev)[0]);
 194
 195         mdev->rev = mt76_rr(dev, MT_ASIC_VERSION);
 196         dev_info(mdev->dev, "ASIC revision: %08x\n", mdev->rev);
 197
 198         mt76_wr(dev, MT_INT_MASK_CSR, 0);
 199
 200         ret = devm_request_irq(mdev->dev, pdev->irq, mt76x02_irq_handler,
 201                                IRQF_SHARED, KBUILD_MODNAME, dev);
 202         if (ret)
 203                 goto error;
 204
 205         ret = mt76x0e_register_device(dev);
 206         if (ret < 0)
 207                 goto error;
 208
 209         return 0;
 210
 211 error:
 212         mt76_free_device(&dev->mt76);
 213
 214         return ret;
 215 }
 216
 217 static void mt76x0e_cleanup(struct mt76x02_dev *dev)
 218 {
 219         clear_bit(MT76_STATE_INITIALIZED, &dev->mphy.state);
 220         tasklet_disable(&dev->mt76.pre_tbtt_tasklet);
 221         mt76x0_chip_onoff(dev, false, false);
 222         mt76x0e_stop_hw(dev);
 223         mt76_dma_cleanup(&dev->mt76);
 224         mt76x02_mcu_cleanup(dev);
 225 }
 226
 227 static void
 228 mt76x0e_remove(struct pci_dev *pdev)
 229 {
 230         struct mt76_dev *mdev = pci_get_drvdata(pdev);
 231         struct mt76x02_dev *dev = container_of(mdev, struct mt76x02_dev, mt76);
 232
 233         mt76_unregister_device(mdev);
 234         mt76x0e_cleanup(dev);
 235         mt76_free_device(mdev);
 236 }
 237
 238 #ifdef CONFIG_PM
 239 static int mt76x0e_suspend(struct pci_dev *pdev, pm_message_t state)
 240 {
 241         struct mt76_dev *mdev = pci_get_drvdata(pdev);
 242         struct mt76x02_dev *dev = container_of(mdev, struct mt76x02_dev, mt76);
 243         int i;
 244
 245         mt76_worker_disable(&mdev->tx_worker);
 246         for (i = 0; i < ARRAY_SIZE(mdev->phy.q_tx); i++)
 247                 mt76_queue_tx_cleanup(dev, mdev->phy.q_tx[i], true);
 248         for (i = 0; i < ARRAY_SIZE(mdev->q_mcu); i++)
 249                 mt76_queue_tx_cleanup(dev, mdev->q_mcu[i], true);
 250         napi_disable(&mdev->tx_napi);
 251
 252         mt76_for_each_q_rx(mdev, i)
 253                 napi_disable(&mdev->napi[i]);
 254
 255         mt76x02_dma_disable(dev);
 256         mt76x02_mcu_cleanup(dev);
 257         mt76x0_chip_onoff(dev, false, false);
 258
 259         pci_enable_wake(pdev, pci_choose_state(pdev, state), true);
 260         pci_save_state(pdev);
 261
 262         return pci_set_power_state(pdev, pci_choose_state(pdev, state));
 263 }
 264
 265 static int mt76x0e_resume(struct pci_dev *pdev)
 266 {
 267         struct mt76_dev *mdev = pci_get_drvdata(pdev);
 268         struct mt76x02_dev *dev = container_of(mdev, struct mt76x02_dev, mt76);
 269         int err, i;
 270
 271         err = pci_set_power_state(pdev, PCI_D0);
 272         if (err)
 273                 return err;
 274
 275         pci_restore_state(pdev);
 276
 277         mt76_worker_enable(&mdev->tx_worker);
 278
 279         mt76_for_each_q_rx(mdev, i) {
 280                 mt76_queue_rx_reset(dev, i);
 281                 napi_enable(&mdev->napi[i]);
 282                 napi_schedule(&mdev->napi[i]);
 283         }
 284
 285         napi_enable(&mdev->tx_napi);
 286         napi_schedule(&mdev->tx_napi);
 287
 288         return mt76x0e_init_hardware(dev, true);
 289 }
 290 #endif /* CONFIG_PM */
 291
 292 static const struct pci_device_id mt76x0e_device_table[] = {
 293         { PCI_DEVICE(0x14c3, 0x7610) },
 294         { PCI_DEVICE(0x14c3, 0x7630) },
 295         { PCI_DEVICE(0x14c3, 0x7650) },
 296         { },
 297 };
 298
 299 MODULE_DEVICE_TABLE(pci, mt76x0e_device_table);
 300 MODULE_FIRMWARE(MT7610E_FIRMWARE);
 301 MODULE_FIRMWARE(MT7650E_FIRMWARE);
 302 MODULE_LICENSE("Dual BSD/GPL");
 303
 304 static struct pci_driver mt76x0e_driver = {
 305         .name           = KBUILD_MODNAME,
 306         .id_table       = mt76x0e_device_table,
 307         .probe          = mt76x0e_probe,
 308         .remove         = mt76x0e_remove,
 309 #ifdef CONFIG_PM
 310         .suspend        = mt76x0e_suspend,
 311         .resume         = mt76x0e_resume,
 312 #endif /* CONFIG_PM */
 313 };
 314
 315 module_pci_driver(mt76x0e_driver);