drivers/net/wireless/mediatek/mt76/mt7615/pci.c

   1 // SPDX-License-Identifier: ISC
   2 /* Copyright (C) 2019 MediaTek Inc.
   3  *
   4  * Author: Ryder Lee <ryder.lee@mediatek.com>
   5  *         Felix Fietkau <nbd@nbd.name>
   6  */
   7
   8 #include <linux/kernel.h>
   9 #include <linux/module.h>
  10 #include <linux/pci.h>
  11
  12 #include "mt7615.h"
  13 #include "mcu.h"
  14
  15 static const struct pci_device_id mt7615_pci_device_table[] = {
  16         { PCI_DEVICE(PCI_VENDOR_ID_MEDIATEK, 0x7615) },
  17         { PCI_DEVICE(PCI_VENDOR_ID_MEDIATEK, 0x7663) },
  18         { PCI_DEVICE(PCI_VENDOR_ID_MEDIATEK, 0x7611) },
  19         { },
  20 };
  21
  22 static int mt7615_pci_probe(struct pci_dev *pdev,
  23                             const struct pci_device_id *id)
  24 {
  25         const u32 *map;
  26         int ret;
  27
  28         ret = pcim_enable_device(pdev);
  29         if (ret)
  30                 return ret;
  31
  32         ret = pcim_iomap_regions(pdev, BIT(0), pci_name(pdev));
  33         if (ret)
  34                 return ret;
  35
  36         pci_set_master(pdev);
  37
  38         ret = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_ALL_TYPES);
  39         if (ret < 0)
  40                 return ret;
  41
  42         ret = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
  43         if (ret)
  44                 goto error;
  45
  46         mt76_pci_disable_aspm(pdev);
  47
  48         map = id->device == 0x7663 ? mt7663e_reg_map : mt7615e_reg_map;
  49         ret = mt7615_mmio_probe(&pdev->dev, pcim_iomap_table(pdev)[0],
  50                                 pdev->irq, map);
  51         if (ret)
  52                 goto error;
  53
  54         return 0;
  55 error:
  56         pci_free_irq_vectors(pdev);
  57
  58         return ret;
  59 }
  60
  61 static void mt7615_pci_remove(struct pci_dev *pdev)
  62 {
  63         struct mt76_dev *mdev = pci_get_drvdata(pdev);
  64         struct mt7615_dev *dev = container_of(mdev, struct mt7615_dev, mt76);
  65
  66         mt7615_unregister_device(dev);
  67         devm_free_irq(&pdev->dev, pdev->irq, dev);
  68         pci_free_irq_vectors(pdev);
  69 }
  70
  71 #ifdef CONFIG_PM
  72 static int mt7615_pci_suspend(struct pci_dev *pdev, pm_message_t state)
  73 {
  74         struct mt76_dev *mdev = pci_get_drvdata(pdev);
  75         struct mt7615_dev *dev = container_of(mdev, struct mt7615_dev, mt76);
  76         bool hif_suspend;
  77         int i, err;
  78
  79         err = mt76_connac_pm_wake(&dev->mphy, &dev->pm);
  80         if (err < 0)
  81                 return err;
  82
  83         hif_suspend = !test_bit(MT76_STATE_SUSPEND, &dev->mphy.state) &&
  84                       mt7615_firmware_offload(dev);
  85         if (hif_suspend) {
  86                 err = mt76_connac_mcu_set_hif_suspend(mdev, true);
  87                 if (err)
  88                         return err;
  89         }
  90
  91         napi_disable(&mdev->tx_napi);
  92         mt76_worker_disable(&mdev->tx_worker);
  93
  94         mt76_for_each_q_rx(mdev, i) {
  95                 napi_disable(&mdev->napi[i]);
  96         }
  97         tasklet_kill(&mdev->irq_tasklet);
  98
  99         mt7615_dma_reset(dev);
 100
 101         err = mt7615_wait_pdma_busy(dev);
 102         if (err)
 103                 goto restore;
 104
 105         if (is_mt7663(mdev)) {
 106                 mt76_set(dev, MT_PDMA_SLP_PROT, MT_PDMA_AXI_SLPPROT_ENABLE);
 107                 if (!mt76_poll_msec(dev, MT_PDMA_SLP_PROT,
 108                                     MT_PDMA_AXI_SLPPROT_RDY,
 109                                     MT_PDMA_AXI_SLPPROT_RDY, 1000)) {
 110                         dev_err(mdev->dev, "PDMA sleep protection failed\n");
 111                         err = -EIO;
 112                         goto restore;
 113                 }
 114         }
 115
 116         pci_enable_wake(pdev, pci_choose_state(pdev, state), true);
 117         pci_save_state(pdev);
 118         err = pci_set_power_state(pdev, pci_choose_state(pdev, state));
 119         if (err)
 120                 goto restore;
 121
 122         err = mt7615_mcu_set_fw_ctrl(dev);
 123         if (err)
 124                 goto restore;
 125
 126         return 0;
 127
 128 restore:
 129         mt76_for_each_q_rx(mdev, i) {
 130                 napi_enable(&mdev->napi[i]);
 131         }
 132         napi_enable(&mdev->tx_napi);
 133         if (hif_suspend)
 134                 mt76_connac_mcu_set_hif_suspend(mdev, false);
 135
 136         return err;
 137 }
 138
 139 static int mt7615_pci_resume(struct pci_dev *pdev)
 140 {
 141         struct mt76_dev *mdev = pci_get_drvdata(pdev);
 142         struct mt7615_dev *dev = container_of(mdev, struct mt7615_dev, mt76);
 143         bool pdma_reset;
 144         int i, err;
 145
 146         err = mt7615_mcu_set_drv_ctrl(dev);
 147         if (err < 0)
 148                 return err;
 149
 150         err = pci_set_power_state(pdev, PCI_D0);
 151         if (err)
 152                 return err;
 153
 154         pci_restore_state(pdev);
 155
 156         if (is_mt7663(&dev->mt76)) {
 157                 mt76_clear(dev, MT_PDMA_SLP_PROT, MT_PDMA_AXI_SLPPROT_ENABLE);
 158                 mt76_wr(dev, MT_PCIE_IRQ_ENABLE, 1);
 159         }
 160
 161         pdma_reset = !mt76_rr(dev, MT_WPDMA_TX_RING0_CTRL0) &&
 162                      !mt76_rr(dev, MT_WPDMA_TX_RING0_CTRL1);
 163         if (pdma_reset)
 164                 dev_err(mdev->dev, "PDMA engine must be reinitialized\n");
 165
 166         mt76_worker_enable(&mdev->tx_worker);
 167         local_bh_disable();
 168         mt76_for_each_q_rx(mdev, i) {
 169                 napi_enable(&mdev->napi[i]);
 170                 napi_schedule(&mdev->napi[i]);
 171         }
 172         napi_enable(&mdev->tx_napi);
 173         napi_schedule(&mdev->tx_napi);
 174         local_bh_enable();
 175
 176         if (!test_bit(MT76_STATE_SUSPEND, &dev->mphy.state) &&
 177             mt7615_firmware_offload(dev))
 178                 err = mt76_connac_mcu_set_hif_suspend(mdev, false);
 179
 180         return err;
 181 }
 182 #endif /* CONFIG_PM */
 183
 184 struct pci_driver mt7615_pci_driver = {
 185         .name           = KBUILD_MODNAME,
 186         .id_table       = mt7615_pci_device_table,
 187         .probe          = mt7615_pci_probe,
 188         .remove         = mt7615_pci_remove,
 189 #ifdef CONFIG_PM
 190         .suspend        = mt7615_pci_suspend,
 191         .resume         = mt7615_pci_resume,
 192 #endif /* CONFIG_PM */
 193 };
 194
 195 MODULE_DEVICE_TABLE(pci, mt7615_pci_device_table);
 196 MODULE_FIRMWARE(MT7615_FIRMWARE_CR4);
 197 MODULE_FIRMWARE(MT7615_FIRMWARE_N9);
 198 MODULE_FIRMWARE(MT7615_ROM_PATCH);
 199 MODULE_FIRMWARE(MT7663_OFFLOAD_FIRMWARE_N9);
 200 MODULE_FIRMWARE(MT7663_OFFLOAD_ROM_PATCH);
 201 MODULE_FIRMWARE(MT7663_FIRMWARE_N9);
 202 MODULE_FIRMWARE(MT7663_ROM_PATCH);