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 "mt76x0.h"
11 #include "mcu.h"
12 
13 static int mt76x0e_start(struct ieee80211_hw *hw)
14 {
15 	struct mt76x02_dev *dev = hw->priv;
16 
17 	mt76x02_mac_start(dev);
18 	mt76x0_phy_calibrate(dev, true);
19 	ieee80211_queue_delayed_work(dev->mt76.hw, &dev->mt76.mac_work,
20 				     MT_MAC_WORK_INTERVAL);
21 	ieee80211_queue_delayed_work(dev->mt76.hw, &dev->cal_work,
22 				     MT_CALIBRATE_INTERVAL);
23 	set_bit(MT76_STATE_RUNNING, &dev->mphy.state);
24 
25 	return 0;
26 }
27 
28 static void mt76x0e_stop_hw(struct mt76x02_dev *dev)
29 {
30 	cancel_delayed_work_sync(&dev->cal_work);
31 	cancel_delayed_work_sync(&dev->mt76.mac_work);
32 	clear_bit(MT76_RESTART, &dev->mphy.state);
33 
34 	if (!mt76_poll(dev, MT_WPDMA_GLO_CFG, MT_WPDMA_GLO_CFG_TX_DMA_BUSY,
35 		       0, 1000))
36 		dev_warn(dev->mt76.dev, "TX DMA did not stop\n");
37 	mt76_clear(dev, MT_WPDMA_GLO_CFG, MT_WPDMA_GLO_CFG_TX_DMA_EN);
38 
39 	mt76x0_mac_stop(dev);
40 
41 	if (!mt76_poll(dev, MT_WPDMA_GLO_CFG, MT_WPDMA_GLO_CFG_RX_DMA_BUSY,
42 		       0, 1000))
43 		dev_warn(dev->mt76.dev, "TX DMA did not stop\n");
44 	mt76_clear(dev, MT_WPDMA_GLO_CFG, MT_WPDMA_GLO_CFG_RX_DMA_EN);
45 }
46 
47 static void mt76x0e_stop(struct ieee80211_hw *hw)
48 {
49 	struct mt76x02_dev *dev = hw->priv;
50 
51 	clear_bit(MT76_STATE_RUNNING, &dev->mphy.state);
52 	mt76x0e_stop_hw(dev);
53 }
54 
55 static void
56 mt76x0e_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
57 	      u32 queues, bool drop)
58 {
59 }
60 
61 static const struct ieee80211_ops mt76x0e_ops = {
62 	.tx = mt76x02_tx,
63 	.start = mt76x0e_start,
64 	.stop = mt76x0e_stop,
65 	.add_interface = mt76x02_add_interface,
66 	.remove_interface = mt76x02_remove_interface,
67 	.config = mt76x0_config,
68 	.configure_filter = mt76x02_configure_filter,
69 	.bss_info_changed = mt76x02_bss_info_changed,
70 	.sta_state = mt76_sta_state,
71 	.sta_pre_rcu_remove = mt76_sta_pre_rcu_remove,
72 	.set_key = mt76x02_set_key,
73 	.conf_tx = mt76x02_conf_tx,
74 	.sw_scan_start = mt76_sw_scan,
75 	.sw_scan_complete = mt76x02_sw_scan_complete,
76 	.ampdu_action = mt76x02_ampdu_action,
77 	.sta_rate_tbl_update = mt76x02_sta_rate_tbl_update,
78 	.wake_tx_queue = mt76_wake_tx_queue,
79 	.get_survey = mt76_get_survey,
80 	.get_txpower = mt76_get_txpower,
81 	.flush = mt76x0e_flush,
82 	.set_tim = mt76_set_tim,
83 	.release_buffered_frames = mt76_release_buffered_frames,
84 	.set_coverage_class = mt76x02_set_coverage_class,
85 	.set_rts_threshold = mt76x02_set_rts_threshold,
86 	.get_antenna = mt76_get_antenna,
87 	.reconfig_complete = mt76x02_reconfig_complete,
88 };
89 
90 static int mt76x0e_register_device(struct mt76x02_dev *dev)
91 {
92 	int err;
93 
94 	mt76x0_chip_onoff(dev, true, false);
95 	if (!mt76x02_wait_for_mac(&dev->mt76))
96 		return -ETIMEDOUT;
97 
98 	mt76x02_dma_disable(dev);
99 	err = mt76x0e_mcu_init(dev);
100 	if (err < 0)
101 		return err;
102 
103 	err = mt76x02_dma_init(dev);
104 	if (err < 0)
105 		return err;
106 
107 	err = mt76x0_init_hardware(dev);
108 	if (err < 0)
109 		return err;
110 
111 	mt76x02e_init_beacon_config(dev);
112 
113 	if (mt76_chip(&dev->mt76) == 0x7610) {
114 		u16 val;
115 
116 		mt76_clear(dev, MT_COEXCFG0, BIT(0));
117 
118 		val = mt76x02_eeprom_get(dev, MT_EE_NIC_CONF_0);
119 		if (!(val & MT_EE_NIC_CONF_0_PA_IO_CURRENT))
120 			mt76_set(dev, MT_XO_CTRL7, 0xc03);
121 	}
122 
123 	mt76_clear(dev, 0x110, BIT(9));
124 	mt76_set(dev, MT_MAX_LEN_CFG, BIT(13));
125 
126 	err = mt76x0_register_device(dev);
127 	if (err < 0)
128 		return err;
129 
130 	set_bit(MT76_STATE_INITIALIZED, &dev->mphy.state);
131 
132 	return 0;
133 }
134 
135 static int
136 mt76x0e_probe(struct pci_dev *pdev, const struct pci_device_id *id)
137 {
138 	static const struct mt76_driver_ops drv_ops = {
139 		.txwi_size = sizeof(struct mt76x02_txwi),
140 		.drv_flags = MT_DRV_TX_ALIGNED4_SKBS |
141 			     MT_DRV_SW_RX_AIRTIME,
142 		.survey_flags = SURVEY_INFO_TIME_TX,
143 		.update_survey = mt76x02_update_channel,
144 		.tx_prepare_skb = mt76x02_tx_prepare_skb,
145 		.tx_complete_skb = mt76x02_tx_complete_skb,
146 		.rx_skb = mt76x02_queue_rx_skb,
147 		.rx_poll_complete = mt76x02_rx_poll_complete,
148 		.sta_ps = mt76x02_sta_ps,
149 		.sta_add = mt76x02_sta_add,
150 		.sta_remove = mt76x02_sta_remove,
151 	};
152 	struct mt76x02_dev *dev;
153 	struct mt76_dev *mdev;
154 	int ret;
155 
156 	ret = pcim_enable_device(pdev);
157 	if (ret)
158 		return ret;
159 
160 	ret = pcim_iomap_regions(pdev, BIT(0), pci_name(pdev));
161 	if (ret)
162 		return ret;
163 
164 	pci_set_master(pdev);
165 
166 	ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
167 	if (ret)
168 		return ret;
169 
170 	mdev = mt76_alloc_device(&pdev->dev, sizeof(*dev), &mt76x0e_ops,
171 				 &drv_ops);
172 	if (!mdev)
173 		return -ENOMEM;
174 
175 	dev = container_of(mdev, struct mt76x02_dev, mt76);
176 	mutex_init(&dev->phy_mutex);
177 
178 	mt76_mmio_init(mdev, pcim_iomap_table(pdev)[0]);
179 
180 	mdev->rev = mt76_rr(dev, MT_ASIC_VERSION);
181 	dev_info(mdev->dev, "ASIC revision: %08x\n", mdev->rev);
182 
183 	mt76_wr(dev, MT_INT_MASK_CSR, 0);
184 
185 	ret = devm_request_irq(mdev->dev, pdev->irq, mt76x02_irq_handler,
186 			       IRQF_SHARED, KBUILD_MODNAME, dev);
187 	if (ret)
188 		goto error;
189 
190 	ret = mt76x0e_register_device(dev);
191 	if (ret < 0)
192 		goto error;
193 
194 	return 0;
195 
196 error:
197 	ieee80211_free_hw(mt76_hw(dev));
198 	return ret;
199 }
200 
201 static void mt76x0e_cleanup(struct mt76x02_dev *dev)
202 {
203 	clear_bit(MT76_STATE_INITIALIZED, &dev->mphy.state);
204 	tasklet_disable(&dev->mt76.pre_tbtt_tasklet);
205 	mt76x0_chip_onoff(dev, false, false);
206 	mt76x0e_stop_hw(dev);
207 	mt76_dma_cleanup(&dev->mt76);
208 	mt76x02_mcu_cleanup(dev);
209 }
210 
211 static void
212 mt76x0e_remove(struct pci_dev *pdev)
213 {
214 	struct mt76_dev *mdev = pci_get_drvdata(pdev);
215 	struct mt76x02_dev *dev = container_of(mdev, struct mt76x02_dev, mt76);
216 
217 	mt76_unregister_device(mdev);
218 	mt76x0e_cleanup(dev);
219 	mt76_free_device(mdev);
220 }
221 
222 static const struct pci_device_id mt76x0e_device_table[] = {
223 	{ PCI_DEVICE(0x14c3, 0x7610) },
224 	{ PCI_DEVICE(0x14c3, 0x7630) },
225 	{ PCI_DEVICE(0x14c3, 0x7650) },
226 	{ },
227 };
228 
229 MODULE_DEVICE_TABLE(pci, mt76x0e_device_table);
230 MODULE_FIRMWARE(MT7610E_FIRMWARE);
231 MODULE_FIRMWARE(MT7650E_FIRMWARE);
232 MODULE_LICENSE("Dual BSD/GPL");
233 
234 static struct pci_driver mt76x0e_driver = {
235 	.name		= KBUILD_MODNAME,
236 	.id_table	= mt76x0e_device_table,
237 	.probe		= mt76x0e_probe,
238 	.remove		= mt76x0e_remove,
239 };
240 
241 module_pci_driver(mt76x0e_driver);
242