LXR linux/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
  12static 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
  19static int
  20mt76x2e_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                .tx_prepare_skb = mt76x02_tx_prepare_skb,
  29                .tx_complete_skb = mt76x02_tx_complete_skb,
  30                .rx_skb = mt76x02_queue_rx_skb,
  31                .rx_poll_complete = mt76x02_rx_poll_complete,
  32                .sta_ps = mt76x02_sta_ps,
  33                .sta_add = mt76x02_sta_add,
  34                .sta_remove = mt76x02_sta_remove,
  35        };
  36        struct mt76x02_dev *dev;
  37        struct mt76_dev *mdev;
  38        int ret;
  39
  40        ret = pcim_enable_device(pdev);
  41        if (ret)
  42                return ret;
  43
  44        ret = pcim_iomap_regions(pdev, BIT(0), pci_name(pdev));
  45        if (ret)
  46                return ret;
  47
  48        pci_set_master(pdev);
  49
  50        ret = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
  51        if (ret)
  52                return ret;
  53
  54        mdev = mt76_alloc_device(&pdev->dev, sizeof(*dev), &mt76x2_ops,
  55                                 &drv_ops);
  56        if (!mdev)
  57                return -ENOMEM;
  58
  59        dev = container_of(mdev, struct mt76x02_dev, mt76);
  60        mt76_mmio_init(mdev, pcim_iomap_table(pdev)[0]);
  61        mt76x2_reset_wlan(dev, false);
  62
  63        mdev->rev = mt76_rr(dev, MT_ASIC_VERSION);
  64        dev_info(mdev->dev, "ASIC revision: %08x\n", mdev->rev);
  65
  66        mt76_wr(dev, MT_INT_MASK_CSR, 0);
  67
  68        ret = devm_request_irq(mdev->dev, pdev->irq, mt76x02_irq_handler,
  69                               IRQF_SHARED, KBUILD_MODNAME, dev);
  70        if (ret)
  71                goto error;
  72
  73        ret = mt76x2_register_device(dev);
  74        if (ret)
  75                goto error;
  76
  77        /* Fix up ASPM configuration */
  78
  79        /* RG_SSUSB_G1_CDR_BIR_LTR = 0x9 */
  80        mt76_rmw_field(dev, 0x15a10, 0x1f << 16, 0x9);
  81
  82        /* RG_SSUSB_G1_CDR_BIC_LTR = 0xf */
  83        mt76_rmw_field(dev, 0x15a0c, 0xf << 28, 0xf);
  84
  85        /* RG_SSUSB_CDR_BR_PE1D = 0x3 */
  86        mt76_rmw_field(dev, 0x15c58, 0x3 << 6, 0x3);
  87
  88        mt76_pci_disable_aspm(pdev);
  89
  90        return 0;
  91
  92error:
  93        mt76_free_device(&dev->mt76);
  94
  95        return ret;
  96}
  97
  98static void
  99mt76x2e_remove(struct pci_dev *pdev)
 100{
 101        struct mt76_dev *mdev = pci_get_drvdata(pdev);
 102        struct mt76x02_dev *dev = container_of(mdev, struct mt76x02_dev, mt76);
 103
 104        mt76_unregister_device(mdev);
 105        mt76x2_cleanup(dev);
 106        mt76_free_device(mdev);
 107}
 108
 109static int __maybe_unused
 110mt76x2e_suspend(struct pci_dev *pdev, pm_message_t state)
 111{
 112        struct mt76_dev *mdev = pci_get_drvdata(pdev);
 113        int i, err;
 114
 115        napi_disable(&mdev->tx_napi);
 116        tasklet_kill(&mdev->pre_tbtt_tasklet);
 117        mt76_worker_disable(&mdev->tx_worker);
 118
 119        mt76_for_each_q_rx(mdev, i)
 120                napi_disable(&mdev->napi[i]);
 121
 122        pci_enable_wake(pdev, pci_choose_state(pdev, state), true);
 123        pci_save_state(pdev);
 124        err = pci_set_power_state(pdev, pci_choose_state(pdev, state));
 125        if (err)
 126                goto restore;
 127
 128        return 0;
 129
 130restore:
 131        mt76_for_each_q_rx(mdev, i)
 132                napi_enable(&mdev->napi[i]);
 133        napi_enable(&mdev->tx_napi);
 134
 135        return err;
 136}
 137
 138static int __maybe_unused
 139mt76x2e_resume(struct pci_dev *pdev)
 140{
 141        struct mt76_dev *mdev = pci_get_drvdata(pdev);
 142        struct mt76x02_dev *dev = container_of(mdev, struct mt76x02_dev, mt76);
 143        int i, err;
 144
 145        err = pci_set_power_state(pdev, PCI_D0);
 146        if (err)
 147                return err;
 148
 149        pci_restore_state(pdev);
 150
 151        mt76_worker_enable(&mdev->tx_worker);
 152
 153        local_bh_disable();
 154        mt76_for_each_q_rx(mdev, i) {
 155                napi_enable(&mdev->napi[i]);
 156                napi_schedule(&mdev->napi[i]);
 157        }
 158        napi_enable(&mdev->tx_napi);
 159        napi_schedule(&mdev->tx_napi);
 160        local_bh_enable();
 161
 162        return mt76x2_resume_device(dev);
 163}
 164
 165MODULE_DEVICE_TABLE(pci, mt76x2e_device_table);
 166MODULE_FIRMWARE(MT7662_FIRMWARE);
 167MODULE_FIRMWARE(MT7662_ROM_PATCH);
 168MODULE_LICENSE("Dual BSD/GPL");
 169
 170static struct pci_driver mt76pci_driver = {
 171        .name           = KBUILD_MODNAME,
 172        .id_table       = mt76x2e_device_table,
 173        .probe          = mt76x2e_probe,
 174        .remove         = mt76x2e_remove,
 175#ifdef CONFIG_PM
 176        .suspend        = mt76x2e_suspend,
 177        .resume         = mt76x2e_resume,
 178#endif /* CONFIG_PM */
 179};
 180
 181module_pci_driver(mt76pci_driver);
 182