usb.c

  1// SPDX-License-Identifier: BSD-3-Clause-Clear
  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
 18static 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
 24static 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
 36static 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
 44static 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
 57static 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
 82static 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	timer_delete_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
 95static 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
101static 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
112static 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
193error:
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
203static 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
220static 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, 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
239static 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, true);
257
258	return err;
259}
260#endif /* CONFIG_PM */
261
262MODULE_DEVICE_TABLE(usb, mt7615_device_table);
263MODULE_FIRMWARE(MT7663_OFFLOAD_FIRMWARE_N9);
264MODULE_FIRMWARE(MT7663_OFFLOAD_ROM_PATCH);
265MODULE_FIRMWARE(MT7663_FIRMWARE_N9);
266MODULE_FIRMWARE(MT7663_ROM_PATCH);
267
268static 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};
281module_usb_driver(mt7663u_driver);
282
283MODULE_AUTHOR("Sean Wang <sean.wang@mediatek.com>");
284MODULE_AUTHOR("Lorenzo Bianconi <lorenzo@kernel.org>");
285MODULE_DESCRIPTION("MediaTek MT7663U (USB) wireless driver");
286MODULE_LICENSE("Dual BSD/GPL");