xref: /linux/drivers/net/wireless/mediatek/mt76/mt7615/usb.c (revision 9410645520e9b820069761f3450ef6661418e279)
1 // SPDX-License-Identifier: ISC
2 /* Copyright (C) 2019 MediaTek Inc.
3  *
4  * Author: Felix Fietkau <nbd@nbd.name>
5  *	   Lorenzo Bianconi <lorenzo@kernel.org>
6  *	   Sean Wang <sean.wang@mediatek.com>
7  */
8 
9 #include <linux/kernel.h>
10 #include <linux/module.h>
11 #include <linux/usb.h>
12 
13 #include "mt7615.h"
14 #include "mac.h"
15 #include "mcu.h"
16 #include "regs.h"
17 
18 static const struct usb_device_id mt7615_device_table[] = {
19 	{ USB_DEVICE_AND_INTERFACE_INFO(0x0e8d, 0x7663, 0xff, 0xff, 0xff) },
20 	{ USB_DEVICE_AND_INTERFACE_INFO(0x043e, 0x310c, 0xff, 0xff, 0xff) },
21 	{ },
22 };
23 
mt7663u_rr(struct mt76_dev * dev,u32 addr)24 static u32 mt7663u_rr(struct mt76_dev *dev, u32 addr)
25 {
26 	u32 ret;
27 
28 	mutex_lock(&dev->usb.usb_ctrl_mtx);
29 	ret = ___mt76u_rr(dev, MT_VEND_READ_EXT,
30 			  USB_DIR_IN | USB_TYPE_VENDOR, addr);
31 	mutex_unlock(&dev->usb.usb_ctrl_mtx);
32 
33 	return ret;
34 }
35 
mt7663u_wr(struct mt76_dev * dev,u32 addr,u32 val)36 static void mt7663u_wr(struct mt76_dev *dev, u32 addr, u32 val)
37 {
38 	mutex_lock(&dev->usb.usb_ctrl_mtx);
39 	___mt76u_wr(dev, MT_VEND_WRITE_EXT,
40 		    USB_DIR_OUT | USB_TYPE_VENDOR, addr, val);
41 	mutex_unlock(&dev->usb.usb_ctrl_mtx);
42 }
43 
mt7663u_rmw(struct mt76_dev * dev,u32 addr,u32 mask,u32 val)44 static u32 mt7663u_rmw(struct mt76_dev *dev, u32 addr,
45 		       u32 mask, u32 val)
46 {
47 	mutex_lock(&dev->usb.usb_ctrl_mtx);
48 	val |= ___mt76u_rr(dev, MT_VEND_READ_EXT,
49 			   USB_DIR_IN | USB_TYPE_VENDOR, addr) & ~mask;
50 	___mt76u_wr(dev, MT_VEND_WRITE_EXT,
51 		    USB_DIR_OUT | USB_TYPE_VENDOR, addr, val);
52 	mutex_unlock(&dev->usb.usb_ctrl_mtx);
53 
54 	return val;
55 }
56 
mt7663u_copy(struct mt76_dev * dev,u32 offset,const void * data,int len)57 static void mt7663u_copy(struct mt76_dev *dev, u32 offset,
58 			 const void *data, int len)
59 {
60 	struct mt76_usb *usb = &dev->usb;
61 	int ret, i = 0, batch_len;
62 	const u8 *val = data;
63 
64 	len = round_up(len, 4);
65 
66 	mutex_lock(&usb->usb_ctrl_mtx);
67 	while (i < len) {
68 		batch_len = min_t(int, usb->data_len, len - i);
69 		memcpy(usb->data, val + i, batch_len);
70 		ret = __mt76u_vendor_request(dev, MT_VEND_WRITE_EXT,
71 					     USB_DIR_OUT | USB_TYPE_VENDOR,
72 					     (offset + i) >> 16, offset + i,
73 					     usb->data, batch_len);
74 		if (ret < 0)
75 			break;
76 
77 		i += batch_len;
78 	}
79 	mutex_unlock(&usb->usb_ctrl_mtx);
80 }
81 
mt7663u_stop(struct ieee80211_hw * hw,bool suspend)82 static void mt7663u_stop(struct ieee80211_hw *hw, bool suspend)
83 {
84 	struct mt7615_phy *phy = mt7615_hw_phy(hw);
85 	struct mt7615_dev *dev = hw->priv;
86 
87 	clear_bit(MT76_STATE_RUNNING, &dev->mphy.state);
88 	del_timer_sync(&phy->roc_timer);
89 	cancel_work_sync(&phy->roc_work);
90 	cancel_delayed_work_sync(&phy->scan_work);
91 	cancel_delayed_work_sync(&phy->mt76->mac_work);
92 	mt76u_stop_tx(&dev->mt76);
93 }
94 
mt7663u_cleanup(struct mt7615_dev * dev)95 static void mt7663u_cleanup(struct mt7615_dev *dev)
96 {
97 	clear_bit(MT76_STATE_INITIALIZED, &dev->mphy.state);
98 	mt76u_queues_deinit(&dev->mt76);
99 }
100 
mt7663u_init_work(struct work_struct * work)101 static void mt7663u_init_work(struct work_struct *work)
102 {
103 	struct mt7615_dev *dev;
104 
105 	dev = container_of(work, struct mt7615_dev, mcu_work);
106 	if (mt7663u_mcu_init(dev))
107 		return;
108 
109 	mt7615_init_work(dev);
110 }
111 
mt7663u_probe(struct usb_interface * usb_intf,const struct usb_device_id * id)112 static int mt7663u_probe(struct usb_interface *usb_intf,
113 			 const struct usb_device_id *id)
114 {
115 	static const struct mt76_driver_ops drv_ops = {
116 		.txwi_size = MT_USB_TXD_SIZE,
117 		.drv_flags = MT_DRV_RX_DMA_HDR | MT_DRV_HW_MGMT_TXQ,
118 		.tx_prepare_skb = mt7663_usb_sdio_tx_prepare_skb,
119 		.tx_complete_skb = mt7663_usb_sdio_tx_complete_skb,
120 		.tx_status_data = mt7663_usb_sdio_tx_status_data,
121 		.rx_skb = mt7615_queue_rx_skb,
122 		.rx_check = mt7615_rx_check,
123 		.sta_add = mt7615_mac_sta_add,
124 		.sta_remove = mt7615_mac_sta_remove,
125 		.update_survey = mt7615_update_channel,
126 		.set_channel = mt7615_set_channel,
127 	};
128 	static struct mt76_bus_ops bus_ops = {
129 		.rr = mt7663u_rr,
130 		.wr = mt7663u_wr,
131 		.rmw = mt7663u_rmw,
132 		.read_copy = mt76u_read_copy,
133 		.write_copy = mt7663u_copy,
134 		.type = MT76_BUS_USB,
135 	};
136 	struct usb_device *udev = interface_to_usbdev(usb_intf);
137 	struct ieee80211_ops *ops;
138 	struct mt7615_dev *dev;
139 	struct mt76_dev *mdev;
140 	int ret;
141 
142 	ops = devm_kmemdup(&usb_intf->dev, &mt7615_ops, sizeof(mt7615_ops),
143 			   GFP_KERNEL);
144 	if (!ops)
145 		return -ENOMEM;
146 
147 	ops->stop = mt7663u_stop;
148 
149 	mdev = mt76_alloc_device(&usb_intf->dev, sizeof(*dev), ops, &drv_ops);
150 	if (!mdev)
151 		return -ENOMEM;
152 
153 	dev = container_of(mdev, struct mt7615_dev, mt76);
154 	udev = usb_get_dev(udev);
155 	usb_reset_device(udev);
156 
157 	usb_set_intfdata(usb_intf, dev);
158 
159 	INIT_WORK(&dev->mcu_work, mt7663u_init_work);
160 	dev->reg_map = mt7663_usb_sdio_reg_map;
161 	dev->ops = ops;
162 	ret = __mt76u_init(mdev, usb_intf, &bus_ops);
163 	if (ret < 0)
164 		goto error;
165 
166 	mdev->rev = (mt76_rr(dev, MT_HW_CHIPID) << 16) |
167 		    (mt76_rr(dev, MT_HW_REV) & 0xff);
168 	dev_dbg(mdev->dev, "ASIC revision: %04x\n", mdev->rev);
169 
170 	if (!mt76_poll_msec(dev, MT_CONN_ON_MISC, MT_TOP_MISC2_FW_PWR_ON,
171 			    FW_STATE_PWR_ON << 1, 500)) {
172 		ret = mt7663u_mcu_power_on(dev);
173 		if (ret)
174 			goto error;
175 	} else {
176 		set_bit(MT76_STATE_POWER_OFF, &dev->mphy.state);
177 	}
178 
179 	ret = mt76u_alloc_mcu_queue(&dev->mt76);
180 	if (ret)
181 		goto error;
182 
183 	ret = mt76u_alloc_queues(&dev->mt76);
184 	if (ret)
185 		goto error;
186 
187 	ret = mt7663_usb_sdio_register_device(dev);
188 	if (ret)
189 		goto error;
190 
191 	return 0;
192 
193 error:
194 	mt76u_queues_deinit(&dev->mt76);
195 	usb_set_intfdata(usb_intf, NULL);
196 	usb_put_dev(interface_to_usbdev(usb_intf));
197 
198 	mt76_free_device(&dev->mt76);
199 
200 	return ret;
201 }
202 
mt7663u_disconnect(struct usb_interface * usb_intf)203 static void mt7663u_disconnect(struct usb_interface *usb_intf)
204 {
205 	struct mt7615_dev *dev = usb_get_intfdata(usb_intf);
206 
207 	if (!test_bit(MT76_STATE_INITIALIZED, &dev->mphy.state))
208 		return;
209 
210 	ieee80211_unregister_hw(dev->mt76.hw);
211 	mt7663u_cleanup(dev);
212 
213 	usb_set_intfdata(usb_intf, NULL);
214 	usb_put_dev(interface_to_usbdev(usb_intf));
215 
216 	mt76_free_device(&dev->mt76);
217 }
218 
219 #ifdef CONFIG_PM
mt7663u_suspend(struct usb_interface * intf,pm_message_t state)220 static int mt7663u_suspend(struct usb_interface *intf, pm_message_t state)
221 {
222 	struct mt7615_dev *dev = usb_get_intfdata(intf);
223 
224 	if (!test_bit(MT76_STATE_SUSPEND, &dev->mphy.state) &&
225 	    mt7615_firmware_offload(dev)) {
226 		int err;
227 
228 		err = mt76_connac_mcu_set_hif_suspend(&dev->mt76, true);
229 		if (err < 0)
230 			return err;
231 	}
232 
233 	mt76u_stop_rx(&dev->mt76);
234 	mt76u_stop_tx(&dev->mt76);
235 
236 	return 0;
237 }
238 
mt7663u_resume(struct usb_interface * intf)239 static int mt7663u_resume(struct usb_interface *intf)
240 {
241 	struct mt7615_dev *dev = usb_get_intfdata(intf);
242 	int err;
243 
244 	err = mt76u_vendor_request(&dev->mt76, MT_VEND_FEATURE_SET,
245 				   USB_DIR_OUT | USB_TYPE_VENDOR,
246 				   0x5, 0x0, NULL, 0);
247 	if (err)
248 		return err;
249 
250 	err = mt76u_resume_rx(&dev->mt76);
251 	if (err < 0)
252 		return err;
253 
254 	if (!test_bit(MT76_STATE_SUSPEND, &dev->mphy.state) &&
255 	    mt7615_firmware_offload(dev))
256 		err = mt76_connac_mcu_set_hif_suspend(&dev->mt76, false);
257 
258 	return err;
259 }
260 #endif /* CONFIG_PM */
261 
262 MODULE_DEVICE_TABLE(usb, mt7615_device_table);
263 MODULE_FIRMWARE(MT7663_OFFLOAD_FIRMWARE_N9);
264 MODULE_FIRMWARE(MT7663_OFFLOAD_ROM_PATCH);
265 MODULE_FIRMWARE(MT7663_FIRMWARE_N9);
266 MODULE_FIRMWARE(MT7663_ROM_PATCH);
267 
268 static struct usb_driver mt7663u_driver = {
269 	.name		= KBUILD_MODNAME,
270 	.id_table	= mt7615_device_table,
271 	.probe		= mt7663u_probe,
272 	.disconnect	= mt7663u_disconnect,
273 #ifdef CONFIG_PM
274 	.suspend	= mt7663u_suspend,
275 	.resume		= mt7663u_resume,
276 	.reset_resume	= mt7663u_resume,
277 #endif /* CONFIG_PM */
278 	.soft_unbind	= 1,
279 	.disable_hub_initiated_lpm = 1,
280 };
281 module_usb_driver(mt7663u_driver);
282 
283 MODULE_AUTHOR("Sean Wang <sean.wang@mediatek.com>");
284 MODULE_AUTHOR("Lorenzo Bianconi <lorenzo@kernel.org>");
285 MODULE_DESCRIPTION("MediaTek MT7663U (USB) wireless driver");
286 MODULE_LICENSE("Dual BSD/GPL");
287