sdio.c

  1// SPDX-License-Identifier: BSD-3-Clause-Clear
  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_event = mt7921_mac_sta_event,
104		.sta_remove = mt7921_mac_sta_remove,
105		.update_survey = mt792x_update_channel,
106		.set_channel = mt7921_set_channel,
107	};
108	static const struct mt76_bus_ops mt7921s_ops = {
109		.rr = mt76s_rr,
110		.rmw = mt76s_rmw,
111		.wr = mt76s_wr,
112		.write_copy = mt76s_write_copy,
113		.read_copy = mt76s_read_copy,
114		.wr_rp = mt76s_wr_rp,
115		.rd_rp = mt76s_rd_rp,
116		.type = MT76_BUS_SDIO,
117	};
118	static const struct mt792x_hif_ops mt7921_sdio_ops = {
119		.init_reset = mt7921s_init_reset,
120		.reset = mt7921s_mac_reset,
121		.mcu_init = mt7921s_mcu_init,
122		.drv_own = mt7921s_mcu_drv_pmctrl,
123		.fw_own = mt7921s_mcu_fw_pmctrl,
124	};
125	struct ieee80211_ops *ops;
126	struct mt792x_dev *dev;
127	struct mt76_dev *mdev;
128	u8 features;
129	int ret;
130
131	ops = mt792x_get_mac80211_ops(&func->dev, &mt7921_ops,
132				      (void *)id->driver_data, &features);
133	if (!ops)
134		return -ENOMEM;
135
136	mdev = mt76_alloc_device(&func->dev, sizeof(*dev), ops, &drv_ops);
137	if (!mdev)
138		return -ENOMEM;
139
140	dev = container_of(mdev, struct mt792x_dev, mt76);
141	dev->fw_features = features;
142	dev->hif_ops = &mt7921_sdio_ops;
143	sdio_set_drvdata(func, dev);
144
145	ret = mt76s_init(mdev, func, &mt7921s_ops);
146	if (ret < 0)
147		goto error;
148
149	ret = mt76s_hw_init(mdev, func, MT76_CONNAC2_SDIO);
150	if (ret)
151		goto error;
152
153	atomic_set(&mdev->bus_hung, false);
154
155	mdev->rev = (mt76_rr(dev, MT_HW_CHIPID) << 16) |
156		    (mt76_rr(dev, MT_HW_REV) & 0xff);
157	dev_dbg(mdev->dev, "ASIC revision: %04x\n", mdev->rev);
158
159	mdev->sdio.parse_irq = mt7921s_parse_intr;
160	mdev->sdio.intr_data = devm_kmalloc(mdev->dev,
161					    sizeof(struct mt7921_sdio_intr),
162					    GFP_KERNEL);
163	if (!mdev->sdio.intr_data) {
164		ret = -ENOMEM;
165		goto error;
166	}
167
168	ret = mt76s_alloc_rx_queue(mdev, MT_RXQ_MAIN);
169	if (ret)
170		goto error;
171
172	ret = mt76s_alloc_rx_queue(mdev, MT_RXQ_MCU);
173	if (ret)
174		goto error;
175
176	ret = mt76s_alloc_tx(mdev);
177	if (ret)
178		goto error;
179
180	ret = mt76_worker_setup(mt76_hw(dev), &mdev->sdio.txrx_worker,
181				mt7921s_txrx_worker, "sdio-txrx");
182	if (ret)
183		goto error;
184
185	sched_set_fifo_low(mdev->sdio.txrx_worker.task);
186
187	ret = mt7921_register_device(dev);
188	if (ret)
189		goto error;
190
191	return 0;
192
193error:
194	mt76s_deinit(&dev->mt76);
195	mt76_free_device(&dev->mt76);
196
197	return ret;
198}
199
200static void mt7921s_remove(struct sdio_func *func)
201{
202	struct mt792x_dev *dev = sdio_get_drvdata(func);
203
204	mt7921s_unregister_device(dev);
205}
206
207static int mt7921s_suspend(struct device *__dev)
208{
209	struct sdio_func *func = dev_to_sdio_func(__dev);
210	struct mt792x_dev *dev = sdio_get_drvdata(func);
211	struct mt76_connac_pm *pm = &dev->pm;
212	struct mt76_dev *mdev = &dev->mt76;
213	int err;
214
215	pm->suspended = true;
216	set_bit(MT76_STATE_SUSPEND, &mdev->phy.state);
217
218	flush_work(&dev->reset_work);
219	cancel_delayed_work_sync(&pm->ps_work);
220	cancel_work_sync(&pm->wake_work);
221
222	mt7921_roc_abort_sync(dev);
223
224	err = mt792x_mcu_drv_pmctrl(dev);
225	if (err < 0)
226		goto restore_suspend;
227
228	/* always enable deep sleep during suspend to reduce
229	 * power consumption
230	 */
231	mt76_connac_mcu_set_deep_sleep(mdev, true);
232
233	mt76_txq_schedule_all(&dev->mphy);
234	mt76_worker_disable(&mdev->tx_worker);
235	mt76_worker_disable(&mdev->sdio.status_worker);
236	mt76_worker_disable(&mdev->sdio.stat_worker);
237	clear_bit(MT76_READING_STATS, &dev->mphy.state);
238	mt76_tx_status_check(mdev, true);
239
240	mt76_worker_schedule(&mdev->sdio.txrx_worker);
241	wait_event_timeout(dev->mt76.sdio.wait,
242			   mt76s_txqs_empty(&dev->mt76), 5 * HZ);
243
244	/* It is supposed that SDIO bus is idle at the point */
245	err = mt76_connac_mcu_set_hif_suspend(mdev, true, true);
246	if (err)
247		goto restore_worker;
248
249	mt76_worker_disable(&mdev->sdio.txrx_worker);
250	mt76_worker_disable(&mdev->sdio.net_worker);
251
252	err = mt792x_mcu_fw_pmctrl(dev);
253	if (err)
254		goto restore_txrx_worker;
255
256	sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
257
258	return 0;
259
260restore_txrx_worker:
261	mt76_worker_enable(&mdev->sdio.net_worker);
262	mt76_worker_enable(&mdev->sdio.txrx_worker);
263	mt76_connac_mcu_set_hif_suspend(mdev, false, true);
264
265restore_worker:
266	mt76_worker_enable(&mdev->tx_worker);
267	mt76_worker_enable(&mdev->sdio.status_worker);
268	mt76_worker_enable(&mdev->sdio.stat_worker);
269
270	if (!pm->ds_enable)
271		mt76_connac_mcu_set_deep_sleep(mdev, false);
272
273restore_suspend:
274	clear_bit(MT76_STATE_SUSPEND, &mdev->phy.state);
275	pm->suspended = false;
276
277	if (err < 0)
278		mt792x_reset(&dev->mt76);
279
280	return err;
281}
282
283static int mt7921s_resume(struct device *__dev)
284{
285	struct sdio_func *func = dev_to_sdio_func(__dev);
286	struct mt792x_dev *dev = sdio_get_drvdata(func);
287	struct mt76_connac_pm *pm = &dev->pm;
288	struct mt76_dev *mdev = &dev->mt76;
289	int err;
290
291	clear_bit(MT76_STATE_SUSPEND, &mdev->phy.state);
292
293	err = mt792x_mcu_drv_pmctrl(dev);
294	if (err < 0)
295		goto failed;
296
297	mt76_worker_enable(&mdev->tx_worker);
298	mt76_worker_enable(&mdev->sdio.txrx_worker);
299	mt76_worker_enable(&mdev->sdio.status_worker);
300	mt76_worker_enable(&mdev->sdio.net_worker);
301	mt76_worker_enable(&mdev->sdio.stat_worker);
302
303	/* restore previous ds setting */
304	if (!pm->ds_enable)
305		mt76_connac_mcu_set_deep_sleep(mdev, false);
306
307	err = mt76_connac_mcu_set_hif_suspend(mdev, false, true);
308failed:
309	pm->suspended = false;
310
311	if (err < 0)
312		mt792x_reset(&dev->mt76);
313
314	return err;
315}
316
317MODULE_DEVICE_TABLE(sdio, mt7921s_table);
318MODULE_FIRMWARE(MT7921_FIRMWARE_WM);
319MODULE_FIRMWARE(MT7921_ROM_PATCH);
320
321static DEFINE_SIMPLE_DEV_PM_OPS(mt7921s_pm_ops, mt7921s_suspend, mt7921s_resume);
322
323static struct sdio_driver mt7921s_driver = {
324	.name		= KBUILD_MODNAME,
325	.probe		= mt7921s_probe,
326	.remove		= mt7921s_remove,
327	.id_table	= mt7921s_table,
328	.drv.pm		= pm_sleep_ptr(&mt7921s_pm_ops),
329};
330module_sdio_driver(mt7921s_driver);
331MODULE_DESCRIPTION("MediaTek MT7921S (SDIO) wireless driver");
332MODULE_AUTHOR("Sean Wang <sean.wang@mediatek.com>");
333MODULE_LICENSE("Dual BSD/GPL");