drivers/net/wireless/mediatek/mt76/mt76x2/pci.c

   1 /*
   2  * Copyright (C) 2016 Felix Fietkau <nbd@nbd.name>
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #include <linux/kernel.h>
  18 #include <linux/module.h>
  19 #include <linux/pci.h>
  20
  21 #include "mt76x2.h"
  22
  23 static const struct pci_device_id mt76pci_device_table[] = {
  24         { PCI_DEVICE(0x14c3, 0x7662) },
  25         { PCI_DEVICE(0x14c3, 0x7612) },
  26         { PCI_DEVICE(0x14c3, 0x7602) },
  27         { },
  28 };
  29
  30 static int
  31 mt76pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
  32 {
  33         static const struct mt76_driver_ops drv_ops = {
  34                 .txwi_size = sizeof(struct mt76x02_txwi),
  35                 .tx_aligned4_skbs = true,
  36                 .update_survey = mt76x02_update_channel,
  37                 .tx_prepare_skb = mt76x02_tx_prepare_skb,
  38                 .tx_complete_skb = mt76x02_tx_complete_skb,
  39                 .rx_skb = mt76x02_queue_rx_skb,
  40                 .rx_poll_complete = mt76x02_rx_poll_complete,
  41                 .sta_ps = mt76x02_sta_ps,
  42                 .sta_add = mt76x02_sta_add,
  43                 .sta_remove = mt76x02_sta_remove,
  44         };
  45         struct mt76x02_dev *dev;
  46         struct mt76_dev *mdev;
  47         int ret;
  48
  49         ret = pcim_enable_device(pdev);
  50         if (ret)
  51                 return ret;
  52
  53         ret = pcim_iomap_regions(pdev, BIT(0), pci_name(pdev));
  54         if (ret)
  55                 return ret;
  56
  57         pci_set_master(pdev);
  58
  59         ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
  60         if (ret)
  61                 return ret;
  62
  63         mdev = mt76_alloc_device(&pdev->dev, sizeof(*dev), &mt76x2_ops,
  64                                  &drv_ops);
  65         if (!mdev)
  66                 return -ENOMEM;
  67
  68         dev = container_of(mdev, struct mt76x02_dev, mt76);
  69         mt76_mmio_init(mdev, pcim_iomap_table(pdev)[0]);
  70         mt76x2_reset_wlan(dev, false);
  71
  72         mdev->rev = mt76_rr(dev, MT_ASIC_VERSION);
  73         dev_info(mdev->dev, "ASIC revision: %08x\n", mdev->rev);
  74
  75         ret = devm_request_irq(mdev->dev, pdev->irq, mt76x02_irq_handler,
  76                                IRQF_SHARED, KBUILD_MODNAME, dev);
  77         if (ret)
  78                 goto error;
  79
  80         ret = mt76x2_register_device(dev);
  81         if (ret)
  82                 goto error;
  83
  84         /* Fix up ASPM configuration */
  85
  86         /* RG_SSUSB_G1_CDR_BIR_LTR = 0x9 */
  87         mt76_rmw_field(dev, 0x15a10, 0x1f << 16, 0x9);
  88
  89         /* RG_SSUSB_G1_CDR_BIC_LTR = 0xf */
  90         mt76_rmw_field(dev, 0x15a0c, 0xf << 28, 0xf);
  91
  92         /* RG_SSUSB_CDR_BR_PE1D = 0x3 */
  93         mt76_rmw_field(dev, 0x15c58, 0x3 << 6, 0x3);
  94
  95         return 0;
  96
  97 error:
  98         ieee80211_free_hw(mt76_hw(dev));
  99         return ret;
 100 }
 101
 102 static void
 103 mt76pci_remove(struct pci_dev *pdev)
 104 {
 105         struct mt76_dev *mdev = pci_get_drvdata(pdev);
 106         struct mt76x02_dev *dev = container_of(mdev, struct mt76x02_dev, mt76);
 107
 108         mt76_unregister_device(mdev);
 109         mt76x2_cleanup(dev);
 110         mt76_free_device(mdev);
 111 }
 112
 113 MODULE_DEVICE_TABLE(pci, mt76pci_device_table);
 114 MODULE_FIRMWARE(MT7662_FIRMWARE);
 115 MODULE_FIRMWARE(MT7662_ROM_PATCH);
 116 MODULE_LICENSE("Dual BSD/GPL");
 117
 118 static struct pci_driver mt76pci_driver = {
 119         .name           = KBUILD_MODNAME,
 120         .id_table       = mt76pci_device_table,
 121         .probe          = mt76pci_probe,
 122         .remove         = mt76pci_remove,
 123 };
 124
 125 module_pci_driver(mt76pci_driver);