pci.c

  1// SPDX-License-Identifier: BSD-3-Clause-Clear
  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
 15static 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
 22static 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;
 55error:
 56	pci_free_irq_vectors(pdev);
 57
 58	return ret;
 59}
 60
 61static 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
 72static 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, 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
128restore:
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, true);
135
136	return err;
137}
138
139static 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
168	mt76_for_each_q_rx(mdev, i) {
169		napi_enable(&mdev->napi[i]);
170	}
171	napi_enable(&mdev->tx_napi);
172
173	local_bh_disable();
174	mt76_for_each_q_rx(mdev, i) {
175		napi_schedule(&mdev->napi[i]);
176	}
177	napi_schedule(&mdev->tx_napi);
178	local_bh_enable();
179
180	if (!test_bit(MT76_STATE_SUSPEND, &dev->mphy.state) &&
181	    mt7615_firmware_offload(dev))
182		err = mt76_connac_mcu_set_hif_suspend(mdev, false, true);
183
184	return err;
185}
186#endif /* CONFIG_PM */
187
188struct pci_driver mt7615_pci_driver = {
189	.name		= KBUILD_MODNAME,
190	.id_table	= mt7615_pci_device_table,
191	.probe		= mt7615_pci_probe,
192	.remove		= mt7615_pci_remove,
193#ifdef CONFIG_PM
194	.suspend	= mt7615_pci_suspend,
195	.resume		= mt7615_pci_resume,
196#endif /* CONFIG_PM */
197};
198
199MODULE_DEVICE_TABLE(pci, mt7615_pci_device_table);
200MODULE_FIRMWARE(MT7615_FIRMWARE_CR4);
201MODULE_FIRMWARE(MT7615_FIRMWARE_N9);
202MODULE_FIRMWARE(MT7615_ROM_PATCH);
203MODULE_FIRMWARE(MT7663_OFFLOAD_FIRMWARE_N9);
204MODULE_FIRMWARE(MT7663_OFFLOAD_ROM_PATCH);
205MODULE_FIRMWARE(MT7663_FIRMWARE_N9);
206MODULE_FIRMWARE(MT7663_ROM_PATCH);