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 
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 
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 
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 
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 
82 static void mt7663u_stop(struct ieee80211_hw *hw)
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 
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 
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 
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 	};
127 	static struct mt76_bus_ops bus_ops = {
128 		.rr = mt7663u_rr,
129 		.wr = mt7663u_wr,
130 		.rmw = mt7663u_rmw,
131 		.read_copy = mt76u_read_copy,
132 		.write_copy = mt7663u_copy,
133 		.type = MT76_BUS_USB,
134 	};
135 	struct usb_device *udev = interface_to_usbdev(usb_intf);
136 	struct ieee80211_ops *ops;
137 	struct mt7615_dev *dev;
138 	struct mt76_dev *mdev;
139 	int ret;
140 
141 	ops = devm_kmemdup(&usb_intf->dev, &mt7615_ops, sizeof(mt7615_ops),
142 			   GFP_KERNEL);
143 	if (!ops)
144 		return -ENOMEM;
145 
146 	ops->stop = mt7663u_stop;
147 
148 	mdev = mt76_alloc_device(&usb_intf->dev, sizeof(*dev), ops, &drv_ops);
149 	if (!mdev)
150 		return -ENOMEM;
151 
152 	dev = container_of(mdev, struct mt7615_dev, mt76);
153 	udev = usb_get_dev(udev);
154 	usb_reset_device(udev);
155 
156 	usb_set_intfdata(usb_intf, dev);
157 
158 	INIT_WORK(&dev->mcu_work, mt7663u_init_work);
159 	dev->reg_map = mt7663_usb_sdio_reg_map;
160 	dev->ops = ops;
161 	ret = __mt76u_init(mdev, usb_intf, &bus_ops);
162 	if (ret < 0)
163 		goto error;
164 
165 	mdev->rev = (mt76_rr(dev, MT_HW_CHIPID) << 16) |
166 		    (mt76_rr(dev, MT_HW_REV) & 0xff);
167 	dev_dbg(mdev->dev, "ASIC revision: %04x\n", mdev->rev);
168 
169 	if (!mt76_poll_msec(dev, MT_CONN_ON_MISC, MT_TOP_MISC2_FW_PWR_ON,
170 			    FW_STATE_PWR_ON << 1, 500)) {
171 		ret = mt7663u_mcu_power_on(dev);
172 		if (ret)
173 			goto error;
174 	} else {
175 		set_bit(MT76_STATE_POWER_OFF, &dev->mphy.state);
176 	}
177 
178 	ret = mt76u_alloc_mcu_queue(&dev->mt76);
179 	if (ret)
180 		goto error;
181 
182 	ret = mt76u_alloc_queues(&dev->mt76);
183 	if (ret)
184 		goto error;
185 
186 	ret = mt7663_usb_sdio_register_device(dev);
187 	if (ret)
188 		goto error;
189 
190 	return 0;
191 
192 error:
193 	mt76u_queues_deinit(&dev->mt76);
194 	usb_set_intfdata(usb_intf, NULL);
195 	usb_put_dev(interface_to_usbdev(usb_intf));
196 
197 	mt76_free_device(&dev->mt76);
198 
199 	return ret;
200 }
201 
202 static void mt7663u_disconnect(struct usb_interface *usb_intf)
203 {
204 	struct mt7615_dev *dev = usb_get_intfdata(usb_intf);
205 
206 	if (!test_bit(MT76_STATE_INITIALIZED, &dev->mphy.state))
207 		return;
208 
209 	ieee80211_unregister_hw(dev->mt76.hw);
210 	mt7663u_cleanup(dev);
211 
212 	usb_set_intfdata(usb_intf, NULL);
213 	usb_put_dev(interface_to_usbdev(usb_intf));
214 
215 	mt76_free_device(&dev->mt76);
216 }
217 
218 #ifdef CONFIG_PM
219 static int mt7663u_suspend(struct usb_interface *intf, pm_message_t state)
220 {
221 	struct mt7615_dev *dev = usb_get_intfdata(intf);
222 
223 	if (!test_bit(MT76_STATE_SUSPEND, &dev->mphy.state) &&
224 	    mt7615_firmware_offload(dev)) {
225 		int err;
226 
227 		err = mt76_connac_mcu_set_hif_suspend(&dev->mt76, true);
228 		if (err < 0)
229 			return err;
230 	}
231 
232 	mt76u_stop_rx(&dev->mt76);
233 	mt76u_stop_tx(&dev->mt76);
234 
235 	return 0;
236 }
237 
238 static int mt7663u_resume(struct usb_interface *intf)
239 {
240 	struct mt7615_dev *dev = usb_get_intfdata(intf);
241 	int err;
242 
243 	err = mt76u_vendor_request(&dev->mt76, MT_VEND_FEATURE_SET,
244 				   USB_DIR_OUT | USB_TYPE_VENDOR,
245 				   0x5, 0x0, NULL, 0);
246 	if (err)
247 		return err;
248 
249 	err = mt76u_resume_rx(&dev->mt76);
250 	if (err < 0)
251 		return err;
252 
253 	if (!test_bit(MT76_STATE_SUSPEND, &dev->mphy.state) &&
254 	    mt7615_firmware_offload(dev))
255 		err = mt76_connac_mcu_set_hif_suspend(&dev->mt76, false);
256 
257 	return err;
258 }
259 #endif /* CONFIG_PM */
260 
261 MODULE_DEVICE_TABLE(usb, mt7615_device_table);
262 MODULE_FIRMWARE(MT7663_OFFLOAD_FIRMWARE_N9);
263 MODULE_FIRMWARE(MT7663_OFFLOAD_ROM_PATCH);
264 MODULE_FIRMWARE(MT7663_FIRMWARE_N9);
265 MODULE_FIRMWARE(MT7663_ROM_PATCH);
266 
267 static struct usb_driver mt7663u_driver = {
268 	.name		= KBUILD_MODNAME,
269 	.id_table	= mt7615_device_table,
270 	.probe		= mt7663u_probe,
271 	.disconnect	= mt7663u_disconnect,
272 #ifdef CONFIG_PM
273 	.suspend	= mt7663u_suspend,
274 	.resume		= mt7663u_resume,
275 	.reset_resume	= mt7663u_resume,
276 #endif /* CONFIG_PM */
277 	.soft_unbind	= 1,
278 	.disable_hub_initiated_lpm = 1,
279 };
280 module_usb_driver(mt7663u_driver);
281 
282 MODULE_AUTHOR("Sean Wang <sean.wang@mediatek.com>");
283 MODULE_AUTHOR("Lorenzo Bianconi <lorenzo@kernel.org>");
284 MODULE_LICENSE("Dual BSD/GPL");
285