drivers/net/wireless/mediatek/mt76/mt76x2/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 "mt76x2.h"
  11
  12 static const struct pci_device_id mt76x2e_device_table[] = {
  13         { PCI_DEVICE(PCI_VENDOR_ID_MEDIATEK, 0x7662) },
  14         { PCI_DEVICE(PCI_VENDOR_ID_MEDIATEK, 0x7612) },
  15         { PCI_DEVICE(PCI_VENDOR_ID_MEDIATEK, 0x7602) },
  16         { },
  17 };
  18
  19 static int
  20 mt76x2e_probe(struct pci_dev *pdev, const struct pci_device_id *id)
  21 {
  22         static const struct mt76_driver_ops drv_ops = {
  23                 .txwi_size = sizeof(struct mt76x02_txwi),
  24                 .drv_flags = MT_DRV_TX_ALIGNED4_SKBS |
  25                              MT_DRV_SW_RX_AIRTIME,
  26                 .survey_flags = SURVEY_INFO_TIME_TX,
  27                 .update_survey = mt76x02_update_channel,
  28                 .set_channel = mt76x2e_set_channel,
  29                 .tx_prepare_skb = mt76x02_tx_prepare_skb,
  30                 .tx_complete_skb = mt76x02_tx_complete_skb,
  31                 .rx_skb = mt76x02_queue_rx_skb,
  32                 .rx_poll_complete = mt76x02_rx_poll_complete,
  33                 .sta_ps = mt76x02_sta_ps,
  34                 .sta_add = mt76x02_sta_add,
  35                 .sta_remove = mt76x02_sta_remove,
  36         };
  37         struct mt76x02_dev *dev;
  38         struct mt76_dev *mdev;
  39         int ret;
  40
  41         ret = pcim_enable_device(pdev);
  42         if (ret)
  43                 return ret;
  44
  45         ret = pcim_iomap_regions(pdev, BIT(0), pci_name(pdev));
  46         if (ret)
  47                 return ret;
  48
  49         pci_set_master(pdev);
  50
  51         ret = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
  52         if (ret)
  53                 return ret;
  54
  55         mdev = mt76_alloc_device(&pdev->dev, sizeof(*dev), &mt76x2_ops,
  56                                  &drv_ops);
  57         if (!mdev)
  58                 return -ENOMEM;
  59
  60         dev = container_of(mdev, struct mt76x02_dev, mt76);
  61         mt76_mmio_init(mdev, pcim_iomap_table(pdev)[0]);
  62         mt76x2_reset_wlan(dev, false);
  63
  64         mdev->rev = mt76_rr(dev, MT_ASIC_VERSION);
  65         dev_info(mdev->dev, "ASIC revision: %08x\n", mdev->rev);
  66
  67         mt76_wr(dev, MT_INT_MASK_CSR, 0);
  68
  69         ret = devm_request_irq(mdev->dev, pdev->irq, mt76x02_irq_handler,
  70                                IRQF_SHARED, KBUILD_MODNAME, dev);
  71         if (ret)
  72                 goto error;
  73
  74         ret = mt76x2_register_device(dev);
  75         if (ret)
  76                 goto error;
  77
  78         /* Fix up ASPM configuration */
  79
  80         /* RG_SSUSB_G1_CDR_BIR_LTR = 0x9 */
  81         mt76_rmw_field(dev, 0x15a10, 0x1f << 16, 0x9);
  82
  83         /* RG_SSUSB_G1_CDR_BIC_LTR = 0xf */
  84         mt76_rmw_field(dev, 0x15a0c, 0xfU << 28, 0xf);
  85
  86         /* RG_SSUSB_CDR_BR_PE1D = 0x3 */
  87         mt76_rmw_field(dev, 0x15c58, 0x3 << 6, 0x3);
  88
  89         mt76_pci_disable_aspm(pdev);
  90
  91         return 0;
  92
  93 error:
  94         mt76_free_device(&dev->mt76);
  95
  96         return ret;
  97 }
  98
  99 static void
 100 mt76x2e_remove(struct pci_dev *pdev)
 101 {
 102         struct mt76_dev *mdev = pci_get_drvdata(pdev);
 103         struct mt76x02_dev *dev = container_of(mdev, struct mt76x02_dev, mt76);
 104
 105         mt76_unregister_device(mdev);
 106         mt76x2_cleanup(dev);
 107         mt76_free_device(mdev);
 108 }
 109
 110 static int __maybe_unused
 111 mt76x2e_suspend(struct pci_dev *pdev, pm_message_t state)
 112 {
 113         struct mt76_dev *mdev = pci_get_drvdata(pdev);
 114         int i, err;
 115
 116         napi_disable(&mdev->tx_napi);
 117         tasklet_kill(&mdev->pre_tbtt_tasklet);
 118         mt76_worker_disable(&mdev->tx_worker);
 119
 120         mt76_for_each_q_rx(mdev, i)
 121                 napi_disable(&mdev->napi[i]);
 122
 123         pci_enable_wake(pdev, pci_choose_state(pdev, state), true);
 124         pci_save_state(pdev);
 125         err = pci_set_power_state(pdev, pci_choose_state(pdev, state));
 126         if (err)
 127                 goto restore;
 128
 129         return 0;
 130
 131 restore:
 132         mt76_for_each_q_rx(mdev, i)
 133                 napi_enable(&mdev->napi[i]);
 134         napi_enable(&mdev->tx_napi);
 135
 136         return err;
 137 }
 138
 139 static int __maybe_unused
 140 mt76x2e_resume(struct pci_dev *pdev)
 141 {
 142         struct mt76_dev *mdev = pci_get_drvdata(pdev);
 143         struct mt76x02_dev *dev = container_of(mdev, struct mt76x02_dev, mt76);
 144         int i, err;
 145
 146         err = pci_set_power_state(pdev, PCI_D0);
 147         if (err)
 148                 return err;
 149
 150         pci_restore_state(pdev);
 151
 152         mt76_worker_enable(&mdev->tx_worker);
 153
 154         mt76_for_each_q_rx(mdev, i) {
 155                 napi_enable(&mdev->napi[i]);
 156         }
 157         napi_enable(&mdev->tx_napi);
 158
 159         local_bh_disable();
 160         mt76_for_each_q_rx(mdev, i) {
 161                 napi_schedule(&mdev->napi[i]);
 162         }
 163         napi_schedule(&mdev->tx_napi);
 164         local_bh_enable();
 165
 166         return mt76x2_resume_device(dev);
 167 }
 168
 169 MODULE_DEVICE_TABLE(pci, mt76x2e_device_table);
 170 MODULE_FIRMWARE(MT7662_FIRMWARE);
 171 MODULE_FIRMWARE(MT7662_ROM_PATCH);
 172 MODULE_DESCRIPTION("MediaTek MT76x2E (PCIe) wireless driver");
 173 MODULE_LICENSE("Dual BSD/GPL");
 174
 175 static struct pci_driver mt76pci_driver = {
 176         .name           = KBUILD_MODNAME,
 177         .id_table       = mt76x2e_device_table,
 178         .probe          = mt76x2e_probe,
 179         .remove         = mt76x2e_remove,
 180 #ifdef CONFIG_PM
 181         .suspend        = mt76x2e_suspend,
 182         .resume         = mt76x2e_resume,
 183 #endif /* CONFIG_PM */
 184 };
 185
 186 module_pci_driver(mt76pci_driver);