1// SPDX-License-Identifier: ISC
2/* Copyright (C) 2021 MediaTek Inc.
3 *
4 */
5
6#include <linux/kernel.h>
7#include <linux/iopoll.h>
8#include <linux/module.h>
9
10#include <linux/mmc/host.h>
11#include <linux/mmc/sdio_ids.h>
12#include <linux/mmc/sdio_func.h>
13
14#include "mt7921.h"
15#include "../sdio.h"
16#include "../mt76_connac2_mac.h"
17#include "mcu.h"
18
19static const struct sdio_device_id mt7921s_table[] = {
20	{ SDIO_DEVICE(SDIO_VENDOR_ID_MEDIATEK, 0x7901),
21		.driver_data = (kernel_ulong_t)MT7921_FIRMWARE_WM },
22	{ }	/* Terminating entry */
23};
24
25static void mt7921s_txrx_worker(struct mt76_worker *w)
26{
27	struct mt76_sdio *sdio = container_of(w, struct mt76_sdio,
28					      txrx_worker);
29	struct mt76_dev *mdev = container_of(sdio, struct mt76_dev, sdio);
30	struct mt792x_dev *dev = container_of(mdev, struct mt792x_dev, mt76);
31
32	if (!mt76_connac_pm_ref(&dev->mphy, &dev->pm)) {
33		queue_work(mdev->wq, &dev->pm.wake_work);
34		return;
35	}
36
37	mt76s_txrx_worker(sdio);
38	mt76_connac_pm_unref(&dev->mphy, &dev->pm);
39}
40
41static void mt7921s_unregister_device(struct mt792x_dev *dev)
42{
43	struct mt76_connac_pm *pm = &dev->pm;
44
45	cancel_work_sync(&dev->init_work);
46	mt76_unregister_device(&dev->mt76);
47	cancel_delayed_work_sync(&pm->ps_work);
48	cancel_work_sync(&pm->wake_work);
49
50	mt76s_deinit(&dev->mt76);
51	mt7921s_wfsys_reset(dev);
52	skb_queue_purge(&dev->mt76.mcu.res_q);
53
54	mt76_free_device(&dev->mt76);
55}
56
57static int mt7921s_parse_intr(struct mt76_dev *dev, struct mt76s_intr *intr)
58{
59	struct mt76_sdio *sdio = &dev->sdio;
60	struct mt7921_sdio_intr *irq_data = sdio->intr_data;
61	int i, err;
62
63	sdio_claim_host(sdio->func);
64	err = sdio_readsb(sdio->func, irq_data, MCR_WHISR, sizeof(*irq_data));
65	sdio_release_host(sdio->func);
66
67	if (err < 0)
68		return err;
69
70	if (irq_data->rx.num[0] > 16 ||
71	    irq_data->rx.num[1] > 128)
72		return -EINVAL;
73
74	intr->isr = irq_data->isr;
75	intr->rec_mb = irq_data->rec_mb;
76	intr->tx.wtqcr = irq_data->tx.wtqcr;
77	intr->rx.num = irq_data->rx.num;
78	for (i = 0; i < 2 ; i++) {
79		if (!i)
80			intr->rx.len[0] = irq_data->rx.len0;
81		else
82			intr->rx.len[1] = irq_data->rx.len1;
83	}
84
85	return 0;
86}
87
88static int mt7921s_probe(struct sdio_func *func,
89			 const struct sdio_device_id *id)
90{
91	static const struct mt76_driver_ops drv_ops = {
92		.txwi_size = MT_SDIO_TXD_SIZE,
93		.drv_flags = MT_DRV_AMSDU_OFFLOAD,
94		.survey_flags = SURVEY_INFO_TIME_TX |
95				SURVEY_INFO_TIME_RX |
96				SURVEY_INFO_TIME_BSS_RX,
97		.tx_prepare_skb = mt7921_usb_sdio_tx_prepare_skb,
98		.tx_complete_skb = mt7921_usb_sdio_tx_complete_skb,
99		.tx_status_data = mt7921_usb_sdio_tx_status_data,
100		.rx_skb = mt7921_queue_rx_skb,
101		.rx_check = mt7921_rx_check,
102		.sta_add = mt7921_mac_sta_add,
103		.sta_assoc = mt7921_mac_sta_assoc,
104		.sta_remove = mt7921_mac_sta_remove,
105		.update_survey = mt792x_update_channel,
106	};
107	static const struct mt76_bus_ops mt7921s_ops = {
108		.rr = mt76s_rr,
109		.rmw = mt76s_rmw,
110		.wr = mt76s_wr,
111		.write_copy = mt76s_write_copy,
112		.read_copy = mt76s_read_copy,
113		.wr_rp = mt76s_wr_rp,
114		.rd_rp = mt76s_rd_rp,
115		.type = MT76_BUS_SDIO,
116	};
117	static const struct mt792x_hif_ops mt7921_sdio_ops = {
118		.init_reset = mt7921s_init_reset,
119		.reset = mt7921s_mac_reset,
120		.mcu_init = mt7921s_mcu_init,
121		.drv_own = mt7921s_mcu_drv_pmctrl,
122		.fw_own = mt7921s_mcu_fw_pmctrl,
123	};
124	struct ieee80211_ops *ops;
125	struct mt792x_dev *dev;
126	struct mt76_dev *mdev;
127	u8 features;
128	int ret;
129
130	ops = mt792x_get_mac80211_ops(&func->dev, &mt7921_ops,
131				      (void *)id->driver_data, &features);
132	if (!ops)
133		return -ENOMEM;
134
135	mdev = mt76_alloc_device(&func->dev, sizeof(*dev), ops, &drv_ops);
136	if (!mdev)
137		return -ENOMEM;
138
139	dev = container_of(mdev, struct mt792x_dev, mt76);
140	dev->fw_features = features;
141	dev->hif_ops = &mt7921_sdio_ops;
142	sdio_set_drvdata(func, dev);
143
144	ret = mt76s_init(mdev, func, &mt7921s_ops);
145	if (ret < 0)
146		goto error;
147
148	ret = mt76s_hw_init(mdev, func, MT76_CONNAC2_SDIO);
149	if (ret)
150		goto error;
151
152	mdev->rev = (mt76_rr(dev, MT_HW_CHIPID) << 16) |
153		    (mt76_rr(dev, MT_HW_REV) & 0xff);
154	dev_dbg(mdev->dev, "ASIC revision: %04x\n", mdev->rev);
155
156	mdev->sdio.parse_irq = mt7921s_parse_intr;
157	mdev->sdio.intr_data = devm_kmalloc(mdev->dev,
158					    sizeof(struct mt7921_sdio_intr),
159					    GFP_KERNEL);
160	if (!mdev->sdio.intr_data) {
161		ret = -ENOMEM;
162		goto error;
163	}
164
165	ret = mt76s_alloc_rx_queue(mdev, MT_RXQ_MAIN);
166	if (ret)
167		goto error;
168
169	ret = mt76s_alloc_rx_queue(mdev, MT_RXQ_MCU);
170	if (ret)
171		goto error;
172
173	ret = mt76s_alloc_tx(mdev);
174	if (ret)
175		goto error;
176
177	ret = mt76_worker_setup(mt76_hw(dev), &mdev->sdio.txrx_worker,
178				mt7921s_txrx_worker, "sdio-txrx");
179	if (ret)
180		goto error;
181
182	sched_set_fifo_low(mdev->sdio.txrx_worker.task);
183
184	ret = mt7921_register_device(dev);
185	if (ret)
186		goto error;
187
188	return 0;
189
190error:
191	mt76s_deinit(&dev->mt76);
192	mt76_free_device(&dev->mt76);
193
194	return ret;
195}
196
197static void mt7921s_remove(struct sdio_func *func)
198{
199	struct mt792x_dev *dev = sdio_get_drvdata(func);
200
201	mt7921s_unregister_device(dev);
202}
203
204static int mt7921s_suspend(struct device *__dev)
205{
206	struct sdio_func *func = dev_to_sdio_func(__dev);
207	struct mt792x_dev *dev = sdio_get_drvdata(func);
208	struct mt76_connac_pm *pm = &dev->pm;
209	struct mt76_dev *mdev = &dev->mt76;
210	int err;
211
212	pm->suspended = true;
213	set_bit(MT76_STATE_SUSPEND, &mdev->phy.state);
214
215	flush_work(&dev->reset_work);
216	cancel_delayed_work_sync(&pm->ps_work);
217	cancel_work_sync(&pm->wake_work);
218
219	mt7921_roc_abort_sync(dev);
220
221	err = mt792x_mcu_drv_pmctrl(dev);
222	if (err < 0)
223		goto restore_suspend;
224
225	/* always enable deep sleep during suspend to reduce
226	 * power consumption
227	 */
228	mt76_connac_mcu_set_deep_sleep(mdev, true);
229
230	mt76_txq_schedule_all(&dev->mphy);
231	mt76_worker_disable(&mdev->tx_worker);
232	mt76_worker_disable(&mdev->sdio.status_worker);
233	mt76_worker_disable(&mdev->sdio.stat_worker);
234	clear_bit(MT76_READING_STATS, &dev->mphy.state);
235	mt76_tx_status_check(mdev, true);
236
237	mt76_worker_schedule(&mdev->sdio.txrx_worker);
238	wait_event_timeout(dev->mt76.sdio.wait,
239			   mt76s_txqs_empty(&dev->mt76), 5 * HZ);
240
241	/* It is supposed that SDIO bus is idle at the point */
242	err = mt76_connac_mcu_set_hif_suspend(mdev, true);
243	if (err)
244		goto restore_worker;
245
246	mt76_worker_disable(&mdev->sdio.txrx_worker);
247	mt76_worker_disable(&mdev->sdio.net_worker);
248
249	err = mt792x_mcu_fw_pmctrl(dev);
250	if (err)
251		goto restore_txrx_worker;
252
253	sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
254
255	return 0;
256
257restore_txrx_worker:
258	mt76_worker_enable(&mdev->sdio.net_worker);
259	mt76_worker_enable(&mdev->sdio.txrx_worker);
260	mt76_connac_mcu_set_hif_suspend(mdev, false);
261
262restore_worker:
263	mt76_worker_enable(&mdev->tx_worker);
264	mt76_worker_enable(&mdev->sdio.status_worker);
265	mt76_worker_enable(&mdev->sdio.stat_worker);
266
267	if (!pm->ds_enable)
268		mt76_connac_mcu_set_deep_sleep(mdev, false);
269
270restore_suspend:
271	clear_bit(MT76_STATE_SUSPEND, &mdev->phy.state);
272	pm->suspended = false;
273
274	if (err < 0)
275		mt792x_reset(&dev->mt76);
276
277	return err;
278}
279
280static int mt7921s_resume(struct device *__dev)
281{
282	struct sdio_func *func = dev_to_sdio_func(__dev);
283	struct mt792x_dev *dev = sdio_get_drvdata(func);
284	struct mt76_connac_pm *pm = &dev->pm;
285	struct mt76_dev *mdev = &dev->mt76;
286	int err;
287
288	clear_bit(MT76_STATE_SUSPEND, &mdev->phy.state);
289
290	err = mt792x_mcu_drv_pmctrl(dev);
291	if (err < 0)
292		goto failed;
293
294	mt76_worker_enable(&mdev->tx_worker);
295	mt76_worker_enable(&mdev->sdio.txrx_worker);
296	mt76_worker_enable(&mdev->sdio.status_worker);
297	mt76_worker_enable(&mdev->sdio.net_worker);
298	mt76_worker_enable(&mdev->sdio.stat_worker);
299
300	/* restore previous ds setting */
301	if (!pm->ds_enable)
302		mt76_connac_mcu_set_deep_sleep(mdev, false);
303
304	err = mt76_connac_mcu_set_hif_suspend(mdev, false);
305failed:
306	pm->suspended = false;
307
308	if (err < 0)
309		mt792x_reset(&dev->mt76);
310
311	return err;
312}
313
314MODULE_DEVICE_TABLE(sdio, mt7921s_table);
315MODULE_FIRMWARE(MT7921_FIRMWARE_WM);
316MODULE_FIRMWARE(MT7921_ROM_PATCH);
317
318static DEFINE_SIMPLE_DEV_PM_OPS(mt7921s_pm_ops, mt7921s_suspend, mt7921s_resume);
319
320static struct sdio_driver mt7921s_driver = {
321	.name		= KBUILD_MODNAME,
322	.probe		= mt7921s_probe,
323	.remove		= mt7921s_remove,
324	.id_table	= mt7921s_table,
325	.drv.pm		= pm_sleep_ptr(&mt7921s_pm_ops),
326};
327module_sdio_driver(mt7921s_driver);
328MODULE_DESCRIPTION("MediaTek MT7921S (SDIO) wireless driver");
329MODULE_AUTHOR("Sean Wang <sean.wang@mediatek.com>");
330MODULE_LICENSE("Dual BSD/GPL");
331