pci.c

  1// SPDX-License-Identifier: BSD-3-Clause-Clear
  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			     MT_DRV_IGNORE_TXS_FAILED,
 27		.survey_flags = SURVEY_INFO_TIME_TX,
 28		.update_survey = mt76x02_update_channel,
 29		.set_channel = mt76x2e_set_channel,
 30		.tx_prepare_skb = mt76x02_tx_prepare_skb,
 31		.tx_complete_skb = mt76x02_tx_complete_skb,
 32		.rx_skb = mt76x02_queue_rx_skb,
 33		.rx_poll_complete = mt76x02_rx_poll_complete,
 34		.sta_ps = mt76x02_sta_ps,
 35		.sta_add = mt76x02_sta_add,
 36		.sta_remove = mt76x02_sta_remove,
 37	};
 38	struct mt76x02_dev *dev;
 39	struct mt76_dev *mdev;
 40	int ret;
 41
 42	ret = pcim_enable_device(pdev);
 43	if (ret)
 44		return ret;
 45
 46	ret = pcim_iomap_regions(pdev, BIT(0), pci_name(pdev));
 47	if (ret)
 48		return ret;
 49
 50	pci_set_master(pdev);
 51
 52	ret = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
 53	if (ret)
 54		return ret;
 55
 56	mdev = mt76_alloc_device(&pdev->dev, sizeof(*dev), &mt76x2_ops,
 57				 &drv_ops);
 58	if (!mdev)
 59		return -ENOMEM;
 60
 61	dev = container_of(mdev, struct mt76x02_dev, mt76);
 62	mt76_mmio_init(mdev, pcim_iomap_table(pdev)[0]);
 63	mt76x2_reset_wlan(dev, false);
 64
 65	mdev->rev = mt76_rr(dev, MT_ASIC_VERSION);
 66	dev_info(mdev->dev, "ASIC revision: %08x\n", mdev->rev);
 67
 68	mt76_wr(dev, MT_INT_MASK_CSR, 0);
 69
 70	ret = devm_request_irq(mdev->dev, pdev->irq, mt76x02_irq_handler,
 71			       IRQF_SHARED, KBUILD_MODNAME, dev);
 72	if (ret)
 73		goto error;
 74
 75	ret = mt76x2_register_device(dev);
 76	if (ret)
 77		goto error;
 78
 79	/* Fix up ASPM configuration */
 80
 81	/* RG_SSUSB_G1_CDR_BIR_LTR = 0x9 */
 82	mt76_rmw_field(dev, 0x15a10, 0x1f << 16, 0x9);
 83
 84	/* RG_SSUSB_G1_CDR_BIC_LTR = 0xf */
 85	mt76_rmw_field(dev, 0x15a0c, 0xfU << 28, 0xf);
 86
 87	/* RG_SSUSB_CDR_BR_PE1D = 0x3 */
 88	mt76_rmw_field(dev, 0x15c58, 0x3 << 6, 0x3);
 89
 90	mt76_pci_disable_aspm(pdev);
 91
 92	return 0;
 93
 94error:
 95	mt76_free_device(&dev->mt76);
 96
 97	return ret;
 98}
 99
100static void
101mt76x2e_remove(struct pci_dev *pdev)
102{
103	struct mt76_dev *mdev = pci_get_drvdata(pdev);
104	struct mt76x02_dev *dev = container_of(mdev, struct mt76x02_dev, mt76);
105
106	mt76_unregister_device(mdev);
107	mt76x2_cleanup(dev);
108	mt76_free_device(mdev);
109}
110
111static int __maybe_unused
112mt76x2e_suspend(struct pci_dev *pdev, pm_message_t state)
113{
114	struct mt76_dev *mdev = pci_get_drvdata(pdev);
115	int i, err;
116
117	napi_disable(&mdev->tx_napi);
118	tasklet_kill(&mdev->pre_tbtt_tasklet);
119	mt76_worker_disable(&mdev->tx_worker);
120
121	mt76_for_each_q_rx(mdev, i)
122		napi_disable(&mdev->napi[i]);
123
124	pci_enable_wake(pdev, pci_choose_state(pdev, state), true);
125	pci_save_state(pdev);
126	err = pci_set_power_state(pdev, pci_choose_state(pdev, state));
127	if (err)
128		goto restore;
129
130	return 0;
131
132restore:
133	mt76_for_each_q_rx(mdev, i)
134		napi_enable(&mdev->napi[i]);
135	napi_enable(&mdev->tx_napi);
136
137	return err;
138}
139
140static int __maybe_unused
141mt76x2e_resume(struct pci_dev *pdev)
142{
143	struct mt76_dev *mdev = pci_get_drvdata(pdev);
144	struct mt76x02_dev *dev = container_of(mdev, struct mt76x02_dev, mt76);
145	int i, err;
146
147	err = pci_set_power_state(pdev, PCI_D0);
148	if (err)
149		return err;
150
151	pci_restore_state(pdev);
152
153	mt76_worker_enable(&mdev->tx_worker);
154
155	mt76_for_each_q_rx(mdev, i) {
156		napi_enable(&mdev->napi[i]);
157	}
158	napi_enable(&mdev->tx_napi);
159
160	local_bh_disable();
161	mt76_for_each_q_rx(mdev, i) {
162		napi_schedule(&mdev->napi[i]);
163	}
164	napi_schedule(&mdev->tx_napi);
165	local_bh_enable();
166
167	return mt76x2_resume_device(dev);
168}
169
170MODULE_DEVICE_TABLE(pci, mt76x2e_device_table);
171MODULE_FIRMWARE(MT7662_FIRMWARE);
172MODULE_FIRMWARE(MT7662_ROM_PATCH);
173MODULE_DESCRIPTION("MediaTek MT76x2E (PCIe) wireless driver");
174MODULE_LICENSE("Dual BSD/GPL");
175
176static struct pci_driver mt76pci_driver = {
177	.name		= KBUILD_MODNAME,
178	.id_table	= mt76x2e_device_table,
179	.probe		= mt76x2e_probe,
180	.remove		= mt76x2e_remove,
181#ifdef CONFIG_PM
182	.suspend	= mt76x2e_suspend,
183	.resume		= mt76x2e_resume,
184#endif /* CONFIG_PM */
185};
186
187module_pci_driver(mt76pci_driver);