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 "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 { } /* Terminating entry */
22 };
23
mt7921s_txrx_worker(struct mt76_worker * w)24 static void mt7921s_txrx_worker(struct mt76_worker *w)
25 {
26 struct mt76_sdio *sdio = container_of(w, struct mt76_sdio,
27 txrx_worker);
28 struct mt76_dev *mdev = container_of(sdio, struct mt76_dev, sdio);
29 struct mt7921_dev *dev = container_of(mdev, struct mt7921_dev, mt76);
30
31 if (!mt76_connac_pm_ref(&dev->mphy, &dev->pm)) {
32 queue_work(mdev->wq, &dev->pm.wake_work);
33 return;
34 }
35
36 mt76s_txrx_worker(sdio);
37 mt76_connac_pm_unref(&dev->mphy, &dev->pm);
38 }
39
mt7921s_unregister_device(struct mt7921_dev * dev)40 static void mt7921s_unregister_device(struct mt7921_dev *dev)
41 {
42 struct mt76_connac_pm *pm = &dev->pm;
43
44 mt76_unregister_device(&dev->mt76);
45 cancel_delayed_work_sync(&pm->ps_work);
46 cancel_work_sync(&pm->wake_work);
47
48 mt76s_deinit(&dev->mt76);
49 mt7921s_wfsys_reset(dev);
50 mt7921_mcu_exit(dev);
51
52 mt76_free_device(&dev->mt76);
53 }
54
mt7921s_parse_intr(struct mt76_dev * dev,struct mt76s_intr * intr)55 static int mt7921s_parse_intr(struct mt76_dev *dev, struct mt76s_intr *intr)
56 {
57 struct mt76_sdio *sdio = &dev->sdio;
58 struct mt7921_sdio_intr *irq_data = sdio->intr_data;
59 int i, err;
60
61 err = sdio_readsb(sdio->func, irq_data, MCR_WHISR, sizeof(*irq_data));
62 if (err < 0)
63 return err;
64
65 intr->isr = irq_data->isr;
66 intr->rec_mb = irq_data->rec_mb;
67 intr->tx.wtqcr = irq_data->tx.wtqcr;
68 intr->rx.num = irq_data->rx.num;
69 for (i = 0; i < 2 ; i++) {
70 if (!i)
71 intr->rx.len[0] = irq_data->rx.len0;
72 else
73 intr->rx.len[1] = irq_data->rx.len1;
74 }
75
76 return 0;
77 }
78
mt7921s_probe(struct sdio_func * func,const struct sdio_device_id * id)79 static int mt7921s_probe(struct sdio_func *func,
80 const struct sdio_device_id *id)
81 {
82 static const struct mt76_driver_ops drv_ops = {
83 .txwi_size = MT_SDIO_TXD_SIZE,
84 .survey_flags = SURVEY_INFO_TIME_TX |
85 SURVEY_INFO_TIME_RX |
86 SURVEY_INFO_TIME_BSS_RX,
87 .tx_prepare_skb = mt7921s_tx_prepare_skb,
88 .tx_complete_skb = mt7921s_tx_complete_skb,
89 .tx_status_data = mt7921s_tx_status_data,
90 .rx_skb = mt7921_queue_rx_skb,
91 .sta_ps = mt7921_sta_ps,
92 .sta_add = mt7921_mac_sta_add,
93 .sta_assoc = mt7921_mac_sta_assoc,
94 .sta_remove = mt7921_mac_sta_remove,
95 .update_survey = mt7921_update_channel,
96 };
97 static const struct mt76_bus_ops mt7921s_ops = {
98 .rr = mt76s_rr,
99 .rmw = mt76s_rmw,
100 .wr = mt76s_wr,
101 .write_copy = mt76s_write_copy,
102 .read_copy = mt76s_read_copy,
103 .wr_rp = mt76s_wr_rp,
104 .rd_rp = mt76s_rd_rp,
105 .type = MT76_BUS_SDIO,
106 };
107 static const struct mt7921_hif_ops mt7921_sdio_ops = {
108 .init_reset = mt7921s_init_reset,
109 .reset = mt7921s_mac_reset,
110 .mcu_init = mt7921s_mcu_init,
111 .drv_own = mt7921s_mcu_drv_pmctrl,
112 .fw_own = mt7921s_mcu_fw_pmctrl,
113 };
114
115 struct mt7921_dev *dev;
116 struct mt76_dev *mdev;
117 int ret, i;
118
119 mdev = mt76_alloc_device(&func->dev, sizeof(*dev), &mt7921_ops,
120 &drv_ops);
121 if (!mdev)
122 return -ENOMEM;
123
124 dev = container_of(mdev, struct mt7921_dev, mt76);
125 dev->hif_ops = &mt7921_sdio_ops;
126
127 sdio_set_drvdata(func, dev);
128
129 ret = mt76s_init(mdev, func, &mt7921s_ops);
130 if (ret < 0)
131 goto error;
132
133 ret = mt76s_hw_init(mdev, func, MT76_CONNAC2_SDIO);
134 if (ret)
135 goto error;
136
137 mdev->rev = (mt76_rr(dev, MT_HW_CHIPID) << 16) |
138 (mt76_rr(dev, MT_HW_REV) & 0xff);
139 dev_dbg(mdev->dev, "ASIC revision: %04x\n", mdev->rev);
140
141 mdev->sdio.parse_irq = mt7921s_parse_intr;
142 mdev->sdio.intr_data = devm_kmalloc(mdev->dev,
143 sizeof(struct mt7921_sdio_intr),
144 GFP_KERNEL);
145 if (!mdev->sdio.intr_data) {
146 ret = -ENOMEM;
147 goto error;
148 }
149
150 for (i = 0; i < ARRAY_SIZE(mdev->sdio.xmit_buf); i++) {
151 mdev->sdio.xmit_buf[i] = devm_kmalloc(mdev->dev,
152 MT76S_XMIT_BUF_SZ,
153 GFP_KERNEL);
154 if (!mdev->sdio.xmit_buf[i]) {
155 ret = -ENOMEM;
156 goto error;
157 }
158 }
159
160 ret = mt76s_alloc_rx_queue(mdev, MT_RXQ_MAIN);
161 if (ret)
162 goto error;
163
164 ret = mt76s_alloc_rx_queue(mdev, MT_RXQ_MCU);
165 if (ret)
166 goto error;
167
168 ret = mt76s_alloc_tx(mdev);
169 if (ret)
170 goto error;
171
172 ret = mt76_worker_setup(mt76_hw(dev), &mdev->sdio.txrx_worker,
173 mt7921s_txrx_worker, "sdio-txrx");
174 if (ret)
175 goto error;
176
177 sched_set_fifo_low(mdev->sdio.txrx_worker.task);
178
179 ret = mt7921_register_device(dev);
180 if (ret)
181 goto error;
182
183 return 0;
184
185 error:
186 mt76s_deinit(&dev->mt76);
187 mt76_free_device(&dev->mt76);
188
189 return ret;
190 }
191
mt7921s_remove(struct sdio_func * func)192 static void mt7921s_remove(struct sdio_func *func)
193 {
194 struct mt7921_dev *dev = sdio_get_drvdata(func);
195
196 mt7921s_unregister_device(dev);
197 }
198
199 #ifdef CONFIG_PM
mt7921s_suspend(struct device * __dev)200 static int mt7921s_suspend(struct device *__dev)
201 {
202 struct sdio_func *func = dev_to_sdio_func(__dev);
203 struct mt7921_dev *dev = sdio_get_drvdata(func);
204 struct mt76_connac_pm *pm = &dev->pm;
205 struct mt76_dev *mdev = &dev->mt76;
206 bool hif_suspend;
207 int err;
208
209 pm->suspended = true;
210 cancel_delayed_work_sync(&pm->ps_work);
211 cancel_work_sync(&pm->wake_work);
212
213 err = mt7921_mcu_drv_pmctrl(dev);
214 if (err < 0)
215 goto restore_suspend;
216
217 hif_suspend = !test_bit(MT76_STATE_SUSPEND, &dev->mphy.state);
218 if (hif_suspend) {
219 err = mt76_connac_mcu_set_hif_suspend(mdev, true);
220 if (err)
221 goto restore_suspend;
222 }
223
224 /* always enable deep sleep during suspend to reduce
225 * power consumption
226 */
227 mt76_connac_mcu_set_deep_sleep(mdev, true);
228
229 mt76_txq_schedule_all(&dev->mphy);
230 mt76_worker_disable(&mdev->tx_worker);
231 mt76_worker_disable(&mdev->sdio.txrx_worker);
232 mt76_worker_disable(&mdev->sdio.status_worker);
233 mt76_worker_disable(&mdev->sdio.net_worker);
234 cancel_work_sync(&mdev->sdio.stat_work);
235 clear_bit(MT76_READING_STATS, &dev->mphy.state);
236
237 mt76_tx_status_check(mdev, true);
238
239 err = mt7921_mcu_fw_pmctrl(dev);
240 if (err)
241 goto restore_worker;
242
243 sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
244
245 return 0;
246
247 restore_worker:
248 mt76_worker_enable(&mdev->tx_worker);
249 mt76_worker_enable(&mdev->sdio.txrx_worker);
250 mt76_worker_enable(&mdev->sdio.status_worker);
251 mt76_worker_enable(&mdev->sdio.net_worker);
252
253 if (!pm->ds_enable)
254 mt76_connac_mcu_set_deep_sleep(mdev, false);
255
256 if (hif_suspend)
257 mt76_connac_mcu_set_hif_suspend(mdev, false);
258
259 restore_suspend:
260 pm->suspended = false;
261
262 return err;
263 }
264
mt7921s_resume(struct device * __dev)265 static int mt7921s_resume(struct device *__dev)
266 {
267 struct sdio_func *func = dev_to_sdio_func(__dev);
268 struct mt7921_dev *dev = sdio_get_drvdata(func);
269 struct mt76_connac_pm *pm = &dev->pm;
270 struct mt76_dev *mdev = &dev->mt76;
271 int err;
272
273 pm->suspended = false;
274
275 err = mt7921_mcu_drv_pmctrl(dev);
276 if (err < 0)
277 return err;
278
279 mt76_worker_enable(&mdev->tx_worker);
280 mt76_worker_enable(&mdev->sdio.txrx_worker);
281 mt76_worker_enable(&mdev->sdio.status_worker);
282 mt76_worker_enable(&mdev->sdio.net_worker);
283
284 /* restore previous ds setting */
285 if (!pm->ds_enable)
286 mt76_connac_mcu_set_deep_sleep(mdev, false);
287
288 if (!test_bit(MT76_STATE_SUSPEND, &dev->mphy.state))
289 err = mt76_connac_mcu_set_hif_suspend(mdev, false);
290
291 return err;
292 }
293
294 static const struct dev_pm_ops mt7921s_pm_ops = {
295 .suspend = mt7921s_suspend,
296 .resume = mt7921s_resume,
297 };
298 #endif
299
300 MODULE_DEVICE_TABLE(sdio, mt7921s_table);
301 MODULE_FIRMWARE(MT7921_FIRMWARE_WM);
302 MODULE_FIRMWARE(MT7921_ROM_PATCH);
303
304 static struct sdio_driver mt7921s_driver = {
305 .name = KBUILD_MODNAME,
306 .probe = mt7921s_probe,
307 .remove = mt7921s_remove,
308 .id_table = mt7921s_table,
309 #ifdef CONFIG_PM
310 .drv = {
311 .pm = &mt7921s_pm_ops,
312 }
313 #endif
314 };
315 module_sdio_driver(mt7921s_driver);
316 MODULE_AUTHOR("Sean Wang <sean.wang@mediatek.com>");
317 MODULE_LICENSE("Dual BSD/GPL");
318