sdio.c

  1// SPDX-License-Identifier: BSD-3-Clause-Clear
  2/* Copyright (C) 2020 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/iopoll.h>
 11#include <linux/module.h>
 12
 13#include <linux/mmc/host.h>
 14#include <linux/mmc/sdio_ids.h>
 15#include <linux/mmc/sdio_func.h>
 16
 17#include "../sdio.h"
 18#include "mt7615.h"
 19#include "mac.h"
 20#include "mcu.h"
 21
 22static const struct sdio_device_id mt7663s_table[] = {
 23	{ SDIO_DEVICE(SDIO_VENDOR_ID_MEDIATEK, 0x7603) },
 24	{ }	/* Terminating entry */
 25};
 26
 27static void mt7663s_txrx_worker(struct mt76_worker *w)
 28{
 29	struct mt76_sdio *sdio = container_of(w, struct mt76_sdio,
 30					      txrx_worker);
 31	struct mt76_dev *mdev = container_of(sdio, struct mt76_dev, sdio);
 32	struct mt7615_dev *dev = container_of(mdev, struct mt7615_dev, mt76);
 33
 34	if (!mt76_connac_pm_ref(&dev->mphy, &dev->pm)) {
 35		queue_work(mdev->wq, &dev->pm.wake_work);
 36		return;
 37	}
 38	mt76s_txrx_worker(sdio);
 39	mt76_connac_pm_unref(&dev->mphy, &dev->pm);
 40}
 41
 42static void mt7663s_init_work(struct work_struct *work)
 43{
 44	struct mt7615_dev *dev;
 45
 46	dev = container_of(work, struct mt7615_dev, mcu_work);
 47	if (mt7663s_mcu_init(dev))
 48		return;
 49
 50	mt7615_init_work(dev);
 51}
 52
 53static int mt7663s_parse_intr(struct mt76_dev *dev, struct mt76s_intr *intr)
 54{
 55	struct mt76_sdio *sdio = &dev->sdio;
 56	struct mt7663s_intr *irq_data = sdio->intr_data;
 57	int i, err;
 58
 59	sdio_claim_host(sdio->func);
 60	err = sdio_readsb(sdio->func, irq_data, MCR_WHISR, sizeof(*irq_data));
 61	sdio_release_host(sdio->func);
 62
 63	if (err)
 64		return err;
 65
 66	intr->isr = irq_data->isr;
 67	intr->rec_mb = irq_data->rec_mb;
 68	intr->tx.wtqcr = irq_data->tx.wtqcr;
 69	intr->rx.num = irq_data->rx.num;
 70	for (i = 0; i < 2 ; i++)
 71		intr->rx.len[i] = irq_data->rx.len[i];
 72
 73	return 0;
 74}
 75
 76static int mt7663s_probe(struct sdio_func *func,
 77			 const struct sdio_device_id *id)
 78{
 79	static const struct mt76_driver_ops drv_ops = {
 80		.txwi_size = MT_USB_TXD_SIZE,
 81		.drv_flags = MT_DRV_RX_DMA_HDR,
 82		.tx_prepare_skb = mt7663_usb_sdio_tx_prepare_skb,
 83		.tx_complete_skb = mt7663_usb_sdio_tx_complete_skb,
 84		.tx_status_data = mt7663_usb_sdio_tx_status_data,
 85		.rx_skb = mt7615_queue_rx_skb,
 86		.rx_check = mt7615_rx_check,
 87		.sta_add = mt7615_mac_sta_add,
 88		.sta_remove = mt7615_mac_sta_remove,
 89		.update_survey = mt7615_update_channel,
 90		.set_channel = mt7615_set_channel,
 91	};
 92	static const struct mt76_bus_ops mt7663s_ops = {
 93		.rr = mt76s_rr,
 94		.rmw = mt76s_rmw,
 95		.wr = mt76s_wr,
 96		.write_copy = mt76s_write_copy,
 97		.read_copy = mt76s_read_copy,
 98		.wr_rp = mt76s_wr_rp,
 99		.rd_rp = mt76s_rd_rp,
100		.type = MT76_BUS_SDIO,
101	};
102	struct ieee80211_ops *ops;
103	struct mt7615_dev *dev;
104	struct mt76_dev *mdev;
105	int ret;
106
107	ops = devm_kmemdup(&func->dev, &mt7615_ops, sizeof(mt7615_ops),
108			   GFP_KERNEL);
109	if (!ops)
110		return -ENOMEM;
111
112	mdev = mt76_alloc_device(&func->dev, sizeof(*dev), ops, &drv_ops);
113	if (!mdev)
114		return -ENOMEM;
115
116	dev = container_of(mdev, struct mt7615_dev, mt76);
117
118	INIT_WORK(&dev->mcu_work, mt7663s_init_work);
119	dev->reg_map = mt7663_usb_sdio_reg_map;
120	dev->ops = ops;
121	sdio_set_drvdata(func, dev);
122
123	ret = mt76s_init(mdev, func, &mt7663s_ops);
124	if (ret < 0)
125		goto error;
126
127	ret = mt76s_hw_init(mdev, func, MT76_CONNAC_SDIO);
128	if (ret)
129		goto error;
130
131	mdev->rev = (mt76_rr(dev, MT_HW_CHIPID) << 16) |
132		    (mt76_rr(dev, MT_HW_REV) & 0xff);
133	dev_dbg(mdev->dev, "ASIC revision: %04x\n", mdev->rev);
134
135	mdev->sdio.parse_irq = mt7663s_parse_intr;
136	mdev->sdio.intr_data = devm_kmalloc(mdev->dev,
137					    sizeof(struct mt7663s_intr),
138					    GFP_KERNEL);
139	if (!mdev->sdio.intr_data) {
140		ret = -ENOMEM;
141		goto error;
142	}
143
144	ret = mt76s_alloc_rx_queue(mdev, MT_RXQ_MAIN);
145	if (ret)
146		goto error;
147
148	ret = mt76s_alloc_tx(mdev);
149	if (ret)
150		goto error;
151
152	ret = mt76_worker_setup(mt76_hw(dev), &mdev->sdio.txrx_worker,
153				mt7663s_txrx_worker, "sdio-txrx");
154	if (ret)
155		goto error;
156
157	sched_set_fifo_low(mdev->sdio.txrx_worker.task);
158
159	ret = mt7663_usb_sdio_register_device(dev);
160	if (ret)
161		goto error;
162
163	return 0;
164
165error:
166	mt76s_deinit(&dev->mt76);
167	mt76_free_device(&dev->mt76);
168
169	return ret;
170}
171
172static void mt7663s_remove(struct sdio_func *func)
173{
174	struct mt7615_dev *dev = sdio_get_drvdata(func);
175
176	if (!test_and_clear_bit(MT76_STATE_INITIALIZED, &dev->mphy.state))
177		return;
178
179	ieee80211_unregister_hw(dev->mt76.hw);
180	mt76s_deinit(&dev->mt76);
181	mt76_free_device(&dev->mt76);
182}
183
184static int mt7663s_suspend(struct device *dev)
185{
186	struct sdio_func *func = dev_to_sdio_func(dev);
187	struct mt7615_dev *mdev = sdio_get_drvdata(func);
188	int err;
189
190	if (!test_bit(MT76_STATE_SUSPEND, &mdev->mphy.state) &&
191	    mt7615_firmware_offload(mdev)) {
192		int err;
193
194		err = mt76_connac_mcu_set_hif_suspend(&mdev->mt76, true, true);
195		if (err < 0)
196			return err;
197	}
198
199	sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
200
201	err = mt7615_mcu_set_fw_ctrl(mdev);
202	if (err)
203		return err;
204
205	mt76_worker_disable(&mdev->mt76.sdio.txrx_worker);
206	mt76_worker_disable(&mdev->mt76.sdio.status_worker);
207	mt76_worker_disable(&mdev->mt76.sdio.net_worker);
208	mt76_worker_disable(&mdev->mt76.sdio.stat_worker);
209
210	clear_bit(MT76_READING_STATS, &mdev->mphy.state);
211
212	mt76_tx_status_check(&mdev->mt76, true);
213
214	return 0;
215}
216
217static int mt7663s_resume(struct device *dev)
218{
219	struct sdio_func *func = dev_to_sdio_func(dev);
220	struct mt7615_dev *mdev = sdio_get_drvdata(func);
221	int err;
222
223	mt76_worker_enable(&mdev->mt76.sdio.txrx_worker);
224	mt76_worker_enable(&mdev->mt76.sdio.status_worker);
225	mt76_worker_enable(&mdev->mt76.sdio.net_worker);
226
227	err = mt7615_mcu_set_drv_ctrl(mdev);
228	if (err)
229		return err;
230
231	if (!test_bit(MT76_STATE_SUSPEND, &mdev->mphy.state) &&
232	    mt7615_firmware_offload(mdev))
233		err = mt76_connac_mcu_set_hif_suspend(&mdev->mt76, false, true);
234
235	return err;
236}
237
238MODULE_DEVICE_TABLE(sdio, mt7663s_table);
239MODULE_FIRMWARE(MT7663_OFFLOAD_FIRMWARE_N9);
240MODULE_FIRMWARE(MT7663_OFFLOAD_ROM_PATCH);
241MODULE_FIRMWARE(MT7663_FIRMWARE_N9);
242MODULE_FIRMWARE(MT7663_ROM_PATCH);
243
244static DEFINE_SIMPLE_DEV_PM_OPS(mt7663s_pm_ops, mt7663s_suspend, mt7663s_resume);
245
246static struct sdio_driver mt7663s_driver = {
247	.name		= KBUILD_MODNAME,
248	.probe		= mt7663s_probe,
249	.remove		= mt7663s_remove,
250	.id_table	= mt7663s_table,
251	.drv.pm		= pm_sleep_ptr(&mt7663s_pm_ops),
252};
253module_sdio_driver(mt7663s_driver);
254
255MODULE_AUTHOR("Sean Wang <sean.wang@mediatek.com>");
256MODULE_AUTHOR("Lorenzo Bianconi <lorenzo@kernel.org>");
257MODULE_DESCRIPTION("MediaTek MT7663S (SDIO) wireless driver");
258MODULE_LICENSE("Dual BSD/GPL");