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
19 static 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
mt7921s_txrx_worker(struct mt76_worker * w)25 static 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
mt7921s_unregister_device(struct mt792x_dev * dev)41 static 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
mt7921s_parse_intr(struct mt76_dev * dev,struct mt76s_intr * intr)57 static 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
mt7921s_probe(struct sdio_func * func,const struct sdio_device_id * id)88 static 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
193 error:
194 mt76s_deinit(&dev->mt76);
195 mt76_free_device(&dev->mt76);
196
197 return ret;
198 }
199
mt7921s_remove(struct sdio_func * func)200 static 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
mt7921s_suspend(struct device * __dev)207 static 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
260 restore_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
265 restore_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
273 restore_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
mt7921s_resume(struct device * __dev)283 static 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);
308 failed:
309 pm->suspended = false;
310
311 if (err < 0)
312 mt792x_reset(&dev->mt76);
313
314 return err;
315 }
316
317 MODULE_DEVICE_TABLE(sdio, mt7921s_table);
318 MODULE_FIRMWARE(MT7921_FIRMWARE_WM);
319 MODULE_FIRMWARE(MT7921_ROM_PATCH);
320
321 static DEFINE_SIMPLE_DEV_PM_OPS(mt7921s_pm_ops, mt7921s_suspend, mt7921s_resume);
322
323 static 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 };
330 module_sdio_driver(mt7921s_driver);
331 MODULE_DESCRIPTION("MediaTek MT7921S (SDIO) wireless driver");
332 MODULE_AUTHOR("Sean Wang <sean.wang@mediatek.com>");
333 MODULE_LICENSE("Dual BSD/GPL");
334